Skip Navigation
Menu
close
Read Our Reviews
(618) 484-9822
Schedule Online

If your HVAC fan seems like it never shuts off, you are not imagining it. An HVAC fan can run nonstop for several reasons, and not all of them mean something is broken. Sometimes it is a simple thermostat setting. Other times, it points to a control issue, airflow restriction, or system strain during extreme Illinois weather.

In this guide, we will walk through the most common causes, simple checks you can try, and when it makes sense to call Tiger Plumbing, Heating, Air Conditioning & Electrical for a professional diagnosis.

Tiger has been serving Central and Eastern Illinois since 1993. Our licensed HVAC technicians, plumbers, and electricians understand how heating, cooling, ductwork, and electrical controls work together to keep your home comfortable and safe.

Normal vs. Problem: When a Constant Fan Is Actually Okay

In some homes, running the fan more often is intentional. Setting the thermostat fan to “On” instead of “Auto” keeps air circulating even when heating or cooling is not actively running.

This can help:

If your temperature stays steady and your energy bills are reasonable, an always-running fan may simply reflect your chosen comfort settings. The key is knowing it is intentional, not the result of a malfunction.

Common Problems That Make an HVAC Fan Run Nonstop

If the fan runs constantly even when set to “Auto,” it is time to look deeper.

Faulty Thermostat or Incorrect Programming

A faulty thermostat is one of the most common reasons a fan will not shut off. If the system ignores thermostat changes, the display glitches, or the fan runs even after the temperature is satisfied, the thermostat may be sending a continuous signal.

A failed relay, bad temperature sensor, or wiring issue can cause the command to stick. If changing the setting from “On” to “Auto” does not stop the blower motor running, a technician should test the thermostat and connections.

Fan Relay or Control Board Issues

Inside your furnace or air handler is a control board that tells the fan when to turn on and off. If a relay sticks or the board malfunctions, power may continue flowing to the fan even after heating or cooling stops.

This is not a DIY repair. Electrical components require proper testing and replacement by a licensed HVAC technician.

If the fan in ac unit runs constantly without cooling, that can also point to internal control problems.

Airflow Problems and Dirty Filters

Restricted airflow can make your system run longer than normal. A severely clogged filter, blocked return vent, or dirty coils can cause the system to struggle reaching the thermostat setpoint.

When that happens, the blower motor running continuously may be a symptom of the system trying to catch up.

Start with these checks:

If the problem continues, a deeper inspection may be needed. In some cases, Air Duct Services can help address underlying airflow restrictions.

System Size and Extreme Illinois Weather

Illinois summers and winters can be demanding. An undersized system may run almost constantly just to maintain temperature during peak conditions.

Poor insulation, leaky ductwork, or excessive air leaks can also cause near-constant fan operation. If your system struggles year after year, Tiger can evaluate system sizing, ductwork, and overall performance.

Simple Checks You Can Do Before Calling an HVAC Company

Before scheduling service, try these safe steps:

If your HVAC fan still runs nonstop after these steps, professional troubleshooting is the next step.

Is It Bad if My HVAC Fan Runs All the Time?

It depends on the cause.

In some cases, it is a comfort preference. However, nonstop fan operation can increase utility costs and add wear to the blower motor.

If constant operation is tied to control board issues, airflow restrictions, or electrical problems, ignoring it can shorten equipment life.

If you notice related issues, including radiator fan not working properly in certain heating configurations, schedule an inspection soon.

When to Call Tiger Plumbing, Heating and Cooling

Contact Tiger if:

Tiger Plumbing, Heating, Air Conditioning & Electrical is veteran-owned and family-operated, serving Central and Eastern Illinois since 1993. Our team handles heating services, AC repair, furnace repair, and complete HVAC diagnostics.

Homeowners across Central and Eastern Illinois count on our team, and when a repair goes beyond what you planned for, financing can help you move forward.

If your HVAC fan will not shut off and you are unsure why, contact us today to schedule an inspection. A clear diagnosis now helps protect comfort and system longevity. We also provide maintenance plans for long term peace of mind.

Schedule Online(618) 484-9822

HVAC carbon monoxide concerns are real. A malfunctioning gas furnace or other fuel-burning equipment can release carbon monoxide into your home. It is a colorless, odorless gas, and that is what makes it dangerous.

When everything is installed correctly and maintained properly, your HVAC system vents combustion gases safely outdoors. Problems start when a component fails, venting becomes blocked, or the system has not been serviced in a while.

Tiger Plumbing, Heating, Air Conditioning & Electrical has been serving Illinois homeowners since 1993. Our licensed HVAC technicians, plumbers, and electricians work together to make sure your systems operate safely, not just efficiently.

What Is Carbon Monoxide and How Does Your HVAC Create It?

Carbon monoxide forms when fuel like natural gas does not burn completely. You cannot see it or smell it, which is why it can build up without warning.

Any fuel-burning appliance produces carbon monoxide during normal operation, including:

An HVAC system that includes a gas furnace creates carbon monoxide as part of combustion. The system is designed to send that exhaust outside through flue pipes.

A central air conditioner does not create carbon monoxide. However, if a furnace carbon monoxide issue develops, the blower and ductwork can circulate contaminated air throughout the home.

How Can a Faulty HVAC Unit Release Carbon Monoxide?

Carbon monoxide leaks usually happen because something inside the system is worn out, damaged, or blocked.

Cracked Heat Exchanger in Your Furnace

The heat exchanger keeps combustion gases separate from the air that flows through your vents. Over time, metal can weaken from heat and corrosion. If cracks form, a carbon monoxide leak can allow exhaust gases to mix with the air moving through your home.

This is one of the most serious furnace problems because the crack may not be visible from the outside.

Blocked or Damaged Flue and Vent Pipes

Flue pipes carry exhaust gases outdoors. If they are blocked, rusted, disconnected, or improperly installed, gases can back up into living spaces.

Common causes include:

This is why annual inspections matter, especially before winter.

Improper Installation or DIY Changes

Incorrect gas pressure, loose venting connections, or improper slope on exhaust pipes can increase the risk of incomplete combustion.

Heating equipment should always be installed and adjusted by licensed professionals. Small setup mistakes can create larger safety issues later.

Poor Maintenance and Dirty Burners

When burners become dirty or safety controls fail, combustion can become incomplete. That increases carbon monoxide production.

Routine heating services help keep burners clean, venting clear, and safety switches operating as designed.

Can Your Air Conditioner Release Carbon Monoxide?

A typical electric air conditioner does not produce carbon monoxide. However, if CO from a furnace or water heater builds up in a basement or mechanical room, your HVAC system can move that air through the ductwork.

This is why both heating services and AC repair should include checks that ensure airflow and ventilation are functioning correctly.

Warning Signs of a Possible Carbon Monoxide Problem

Carbon monoxide does not have a smell. You cannot rely on scent alone.

Equipment or Home Clues

Health Symptoms in People

If you suspect a carbon monoxide leak, leave the home immediately and contact emergency services.

How to Help Prevent Carbon Monoxide Leaks from Your HVAC

Most CO issues are preventable with routine care.

Joining Tiger’s Membership program helps ensure your equipment is checked regularly. Maintenance reduces wear and helps catch problems early.

If you believe your system is unsafe, contact us for Emergency hvac services right away.

Why Illinois Homeowners Trust Tiger for CO and Furnace Safety

Tiger Plumbing, Heating, Air Conditioning & Electrical has been serving Central and Eastern Illinois since 1993. We are veteran-owned and family-operated, with licensed professionals across HVAC, plumbing, and electrical trades.

Our team understands how systems work together. A furnace issue can affect airflow. Electrical controls affect safety. Ductwork influences how air moves through your home. We look at the full picture.

We serve families throughout Central and Eastern Illinois, and if a repair ends up being more than you planned for, financing options are available.

If you have concerns about carbon monoxide or your heating system has not been inspected recently, contact us today. A professional safety check provides clarity and helps ensure your home stays comfortable and safe.

Schedule Online(618) 484-9822

Mold is one of those problems homeowners worry about for good reason. It affects air quality, comfort, and peace of mind. A common question that comes up during inspections and service calls is this: can HVAC system cause mold inside a home? The short answer is yes, under the right conditions. HVAC systems do not create mold on their own, but they can contribute to growth when moisture and airflow problems are present.

Understanding how mold forms, where HVAC systems fit into the picture, and what steps help reduce risk can make a big difference in protecting your home.

How Mold Grows in Illinois Homes

Mold needs three things to grow: moisture, warmth, and a food source. Illinois homes often provide all three, especially during humid seasons or temperature swings.

Moisture is the biggest factor. High humidity, condensation, or standing water create the environment mold needs. Warm indoor temperatures help it spread, and common materials like dust, insulation, and drywall give it something to grow on. Once conditions are right, mold can develop quickly and spread through the air.

Common HVAC Related Causes of Mold Growth

HVAC systems play a major role in controlling moisture and airflow. When something goes wrong, HVAC mold problems can develop.

Excess Moisture and Condensation

Air conditioners naturally produce condensation as they cool the air. If that moisture is not managed properly, it can collect inside the system or nearby surfaces. Over time, damp areas can lead to mold in HVAC system components, especially around coils and drain pans.

Clogged or Improperly Drained Condensate Lines

Condensate lines are designed to carry moisture away from the system. When they clog or drain incorrectly, water can back up and overflow. Standing water creates a prime environment for mold growth and can contribute to ongoing HVAC mold problems if left unaddressed.

Dirty Evaporator Coils and Air Filters

Dust and debris on coils and filters trap moisture and organic material. This combination increases the risk of mold in HVAC system parts and allows spores to circulate once airflow resumes. Air conditioner mold often starts in these hard to see areas.

Signs of Mold in an HVAC System

Mold is not always visible right away. Many homeowners notice signs before they ever see growth.

Common warning signs include:

These symptoms often point to mold in HVAC system components or moisture issues that need attention.

Is Mold in an HVAC System Dangerous?

Mold spores circulating through ductwork can affect indoor air quality. For some people, exposure can trigger allergy symptoms, headaches, or breathing discomfort. Long term exposure can be especially concerning for children, older adults, or anyone with respiratory conditions.

Air conditioner mold can also spread beyond the HVAC system into walls, ceilings, and insulation. Addressing HVAC mold problems early helps limit both health concerns and property damage.

How to Prevent Mold Growth in Your Illinois HVAC System

Prevention focuses on moisture control, airflow, and routine care. Small steps taken consistently reduce the chance of mold development.

Helpful prevention practices include:

Many HVAC mold problems stem from skipped maintenance. Keeping the system clean and balanced goes a long way toward prevention.

When to Call a Professional for HVAC Mold Issues

If you suspect mold, professional evaluation is important. DIY cleaning may address surface issues, but it often misses hidden moisture problems. Mold in HVAC system components usually signals an underlying issue that needs proper diagnosis.

Professionals can inspect drainage, airflow, and system performance to identify why moisture is building up. They can also recommend safe cleaning or sanitizing steps without spreading spores through the home.

Why Homeowners Trust Tiger

Tiger Services has been helping Illinois homeowners since 1993. Their licensed HVAC technicians, plumbers, and electricians understand how systems interact and how moisture issues in one area can affect the whole home.

Homeowners in Collinsville, Springfield, Bloomington, and Peoria trust Tiger for clear communication, careful inspections, and solutions focused on long term comfort and safety. The goal is not a quick fix, but lasting protection against issues like mold.

Protect Your Illinois Home

If you are concerned and asking can HVAC system cause mold in your home, a professional inspection can provide clarity and peace of mind. Mold risks increase when moisture issues are ignored, but they are manageable with the right approach. If you need more proactive service, Tiger Services offers a membership program where our specialists come to your home on a scheduled basis to ensure your HVAC system is free from mold.

Contact Us Today

Contact us today to schedule an HVAC inspection with Tiger Services. Our experienced team can identify moisture concerns, address HVAC mold problems, and help protect your home’s air quality and comfort. We have several locations all across the state of Illinois to serve your needs. If you are in need of emergency services or need financial assistance for bigger projects, we offer those as well!

Schedule Online(618) 484-9822

When an air conditioner or heat pump keeps icing over, it usually points to a breakdown in how the system is operating. Homeowners often notice the ice and start asking why a system meant to control temperature is freezing instead. In most cases, icing is a signal that airflow, refrigerant levels, or another core function is off. These problems are often straightforward to diagnose and address when they’re caught early.

Understanding what causes freezing, what you can safely do right away, and when it is time to call for help can prevent bigger problems and protect your system.

Common Reasons an HVAC System Keeps Freezing

An HVAC system freezes when the temperature inside the unit drops too low or airflow is restricted. Several conditions can lead to this, and many of them are connected.

Some of the most common HVAC freezing causes include:

These problems are often tied to ongoing HVAC maintenance issues. When routine upkeep is skipped, small airflow or performance problems can slowly turn into ice buildup.

What to Do When Your HVAC System Freezes in Illinois

If you notice ice forming on your system, there are a few safe steps you can take before calling a professional. Acting quickly helps limit damage.

First, turn the system off. This allows the ice to melt and prevents further strain on the equipment. Next, check your air filter. If it looks dirty, replace it. Then make sure vents are open and not blocked by furniture or rugs.

These steps do not fix the root cause, but they can help stabilize the system. Frozen HVAC repair often requires more than a quick adjustment, especially if freezing keeps coming back.

Can Repeated Freezing Damage Your HVAC System?

Yes, repeated freezing can cause serious problems. Ice buildup forces the system to work harder than it should. Over time, this extra stress can damage the compressor, reduce efficiency, and shorten the lifespan of the unit.

Ignoring the issue can also lead to higher energy bills and uneven cooling throughout the home. Many homeowners wait too long because the system still runs after the ice melts, but recurring freezing is a warning sign that should not be ignored.

How Local Conditions in Central Illinois Can Contribute to HVAC Freezing

Homes in Collinsville, Springfield, Bloomington, and Peoria experience wide temperature swings and periods of high humidity. These conditions can increase the risk of freezing, especially during long run times in warmer months.

Humidity adds extra moisture to the air. If airflow is limited or the system is already struggling, that moisture can freeze on the coils. Extended run times also mean the system has less chance to recover between cycles, making underlying HVAC maintenance issues more noticeable.

Local conditions do not cause freezing on their own, but they can make existing problems show up faster.

How to Prevent Your HVAC System From Freezing

Preventing freezing starts with consistent care and attention to airflow. Small habits can make a big difference.

Helpful prevention steps include:

Many HVAC freezing causes are linked to neglect rather than sudden failure. Regular inspections help catch issues before ice becomes a problem.

When to Call a Professional HVAC Technician

If freezing happens more than once, it is time to call a professional. Replacing filters and opening vents can only go so far. Ongoing freezing often points to refrigerant issues, electrical concerns, or internal component problems that require expert diagnosis.

Frozen HVAC repair is not just about removing ice. It involves finding the reason the system cannot maintain proper temperature and airflow. Licensed technicians have the tools and training to evaluate the entire system and recommend the right fix.

Why Homeowners Trust Tiger

Tiger Services has been helping Illinois homeowners since 1993. Their team includes licensed HVAC technicians, plumbers, and electricians who understand how home systems work together. This full system perspective matters when diagnosing freezing issues, because airflow, electrical components, and mechanical parts all play a role.

Homeowners across Collinsville, Springfield, Bloomington, and Peoria choose Tiger because the focus is on long term performance, not temporary solutions. Clear explanations, transparent pricing, and careful workmanship help homeowners feel confident in their decisions.

Get Your HVAC System Back to Normal

If you are still wondering why does my HVAC keep freezing, a professional evaluation can provide answers and peace of mind. Repeated freezing is not something to live with, and it is rarely something that fixes itself.

Contact Us Today

Contact us today to schedule a professional HVAC inspection with Tiger Services. Our experienced team can diagnose the cause of freezing, complete any needed frozen HVAC repair, and help prevent future HVAC maintenance issues. If you are in need of emergency services or need financial assistance, give us a call. We have several locations across Illinois to better serve you!

Schedule Online(618) 484-9822

When you’re trying to figure out what to do when an electrical outlet stops working, it can be frustrating. One minute everything is normal, the next there’s no power at all. In many Illinois homes, especially older ones, this happens more often than people expect. While a dead outlet might seem like a small issue, electrical problems should always be handled carefully to protect your home and everyone in it.

Why an Electrical Outlet May Stop Working

There are several reasons an outlet can lose power. Some are simple and quick to identify, while others point to larger electrical issues. Common causes include a tripped circuit breaker, a GFCI outlet that has shut off power, loose wiring behind the outlet, or a worn or damaged receptacle. In some homes, multiple outlets stop working because they share the same circuit.

Understanding these possibilities helps you decide what’s safe to check and when professional help is needed.

Safety First: What NOT to Do

Before troubleshooting, it’s important to know what actions can create risk. Electrical systems can be dangerous when handled incorrectly. If you are in a serious electrical situation, you can call for emergency services.

Do not:

What to Check When an Outlet Stops Working

There are a few basic steps homeowners can safely take.

  1. Check the circuit breaker: A tripped breaker can cut power to one outlet or several. Reset the breaker fully by switching it off, then back on.
  2. Look for a tripped GFCI outlet: Bathrooms, kitchens, garages, and basements often use GFCI outlets. One tripped GFCI can shut off power to other outlets. Press the reset button if you find one.
  3. Test nearby outlets: If more than one outlet isn’t working, the issue is likely circuit-related rather than a single outlet failure.

If power doesn’t return after these checks, the issue is likely deeper in the electrical system.

Common Electrical Problems Behind a Dead Outlet in Illinois

When an electrical outlet not working isn’t fixed by breakers or GFCIs, the cause may include loose wiring, internal damage to the outlet, overloaded circuits, or aging electrical components. Older Illinois homes often have outlets that have worn out over time or wiring that has loosened after years of use.

These problems usually require professional repair to restore power safely.

Is a Non-Working Outlet Dangerous?

A dead electrical outlet can sometimes signal more serious issues. Loose connections or heat damage behind the wall can increase the risk of electrical fires or shock hazards if ignored. If an outlet feels warm, smells unusual, or shows visible damage, it should be addressed as soon as possible.

When to Call a Professional Electrician

Homeowner troubleshooting should stop when:

A licensed electrician can diagnose the issue, make code-compliant repairs, and ensure the system is safe.

How Professional Electrical Repairs Protect Your Home

Professional electrical repairs do more than restore power. They help prevent future failures, protect connected appliances, and reduce the risk of fire. Electricians evaluate how circuits are loaded, how outlets are wired, and how the electrical system functions as a whole.

This approach supports long-term reliability rather than short-term fixes.

Why Illinois Homeowners Trust Tiger

Tiger Services has served Illinois homeowners since 1993. With over 30 years of experience, their team of licensed electricians, plumbers, and HVAC technicians understands how home systems work together. Electrical issues often connect to heating, cooling, or plumbing concerns, and having one trusted provider helps keep everything running safely.

Homeowners in Collinsville, Springfield, Bloomington, and Peoria rely on Tiger for clear communication, transparent pricing, and workmanship designed to last.

Get Your Electrical Outlet Working Safely Again

If a power outlet stopped working and basic checks didn’t solve the issue, professional service is the safest next step. Tiger Services is ready to diagnose the problem and restore power without guesswork. If you need financing, we can help with that!

Contact Tiger Services today to schedule electrical diagnostics and repair and keep your Illinois home safe. We have several locations across Illinois!

Schedule Online(618) 484-9822

Air duct cleaning comes up often when people are trying to improve indoor air quality or solve comfort issues. Dust buildup, lingering odors, or uneven airflow can all lead to the same question: can air duct cleaning cause damage? It is a smart thing to ask before scheduling service. While duct cleaning can help in certain situations, it is not risk free, especially when it is rushed or done without proper care.

Understanding how duct cleaning works, where problems can happen, and how to avoid them can help you protect your HVAC system and avoid unnecessary repairs.

What Is Air Duct Cleaning?

Air duct cleaning is the process of removing dust, debris, and buildup from the ductwork that moves air throughout a home or building. This typically includes supply ducts, return ducts, and registers. In some cases, parts of the HVAC system may also be involved.

The goal is to clear out material that can restrict airflow or circulate through the space. When done correctly, duct cleaning is controlled and methodical. When it is not, problems can start quickly.

Can Air Duct Cleaning Cause Damage in Illinois Homes?

Yes, air duct cleaning can cause damage if it is done improperly. Many air duct cleaning risks are tied to the wrong tools, untrained workers, or companies that treat ductwork as a simple vacuum job.

Illinois homes vary widely in age and construction. Some have older duct systems that are more fragile, while others use flexible duct materials that require a lighter touch. Improper air duct cleaning in any of these setups can lead to issues that are not always obvious right away.

Types of Damage That Can Occur During Air Duct Cleaning

Damage to Flexible Ducts

Flexible ducts are common, but they are easy to damage. Aggressive brushes or forceful cleaning can tear the inner lining or collapse sections of duct. Once that happens, airflow drops and efficiency suffers. This is one of the most common air duct cleaning risks when cleaning crews are not trained to work with different duct materials.

Disconnected or Leaking Ductwork

Duct sections can loosen if they are pulled or handled carelessly. Small separations may not be noticeable at first, but they allow conditioned air to escape into attics or walls. Over time, these duct cleaning problems can lead to higher energy use and rooms that never feel comfortable.

Damage to HVAC Components

Ducts connect directly to critical HVAC components. If debris is pushed into the system or vacuums are not sealed correctly, parts like blowers or coils can be affected. Improper air duct cleaning can turn a routine service into a larger HVAC repair.

When Air Duct Cleaning Is Safe and Beneficial

There are situations where duct cleaning makes sense and can be done safely. These include visible debris inside ducts, post construction cleanup, or known contamination concerns. In these cases, the key factor is how the work is performed.

Professional duct cleaning starts with inspection, not equipment. A careful approach limits air duct cleaning risks and protects the system instead of stressing it.

Common Air Duct Cleaning Mistakes to Avoid

Many duct cleaning problems come from shortcuts. Homeowners should be cautious of services that focus on speed or unusually low pricing.

Mistakes to watch for include:

These are often signs of improper air duct cleaning methods that can cause damage instead of improvement.

How to Choose a Professional Air Duct Cleaning Company in Illinois

Choosing the right company matters more than the cleaning itself. A qualified provider should understand how ductwork fits into the larger HVAC system and explain their process clearly.

Look for companies that:

This approach reduces duct cleaning problems and supports long term system health.

How Air Duct Condition Affects HVAC Performance and Indoor Air Quality

Damaged or dirty ducts can restrict airflow and force HVAC systems to work harder than necessary. Over time, this strain can shorten equipment life and impact comfort throughout the space.

Clean, intact ductwork supports consistent airflow and better system performance. That is why duct care should always be part of a broader maintenance conversation, not treated as a stand alone fix.

Why Homeowners Trust Tiger

Tiger Services has served Illinois communities since 1993, bringing together licensed HVAC technicians, plumbers, and electricians under one roof. That experience allows our team to look beyond surface issues and understand how systems work together.

Homeowners across Collinsville, Springfield, Bloomington, and Peoria turn to Tiger because the focus is on long term comfort, safety, and clear communication. The goal is not to sell unnecessary services, but to help people make informed decisions about their homes.

Is Air Duct Cleaning Right for Your Home?

Not every home needs duct cleaning, and not every concern points back to the ducts. The best first step is an honest evaluation that looks at the full HVAC system, not just one part.

Contact Us Today

Contact us today to talk with Tiger Services about your air duct concerns. Our team can help you determine if duct cleaning is appropriate and make sure the work protects your system from start to finish. If you are looking for more frequent tune ups to your air ducts or your HVAC system, we provide maintenance plans. We also offer financing options if you need it.

Schedule Online(618) 484-9822
Schedule Your Service

For reliable and honest AC services in Illinois, you can trust Tiger.