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Main Signs That a Heater Needs Service Include

Strange Noises

Unusual noises indicate an issue with your motor, blower wheel, shaft bearing, fan, or another part of your system. Our technicians can diagnose and repair your heater based on the noise before your system completely breaks down.

High Energy Bill

A high energy bill means that your system is using more energy than it should. Your system may be overloaded, have a problem with the heating element or blower, have insufficient airflow, or other issues. A lack of efficiency will continue costing you money until the issue is resolved.

Strange Furnace Odors

If you smell an abnormal odor around or coming from your furnace, you should call us immediately. Unusual odors are often caused by gas leaks, which are extremely dangerous.

Carbon Monoxide Leaks

Carbon monoxide can be detected by a carbon monoxide alarm, and if you don’t have an alarm, it’s vital to install one if you have a furnace on your property. Symptoms of carbon monoxide poisoning are similar to the flu, with headaches, dizziness, shortness of breath, and nausea. Get to a physician right away if you have these symptoms. If you’re experiencing symptoms or your carbon monoxide alarm goes off, air out and evacuate the house, turn off your heater, and call Air Masters immediately.

Inconsistent Home Temperature

Temperature fluctuations in your home can indicate that your furnace is too small for the area it’s supposed to heat, or it could be due to lack of efficiency caused by thermostat issues, blower issues, clogged filters, or other problems.

High Levels of Dust in Your Home

Dusty homes can cause trouble for your furnace or heater. Built-up dust can damage or clog your system, causing efficiency loss.

No Heat

If your furnace isn’t blowing hot air, we’ll check the filters, pilot light, thermostat, and other parts that are likely causing the issue.

The Last Service Was Done a Year or More Ago

Slacking on heater maintenance is one of the most common signs that a heater needs service. Irregular or no maintenance leads to parts breaking, inefficiency, furnace failure, and more.

Puddles Around Furnace

If water pools around your heater, the condensate line or drain may be clogged or broken. If leaks aren’t repaired, the pooling water can cause mold, slipping hazards, and other issues.

Weak Airflow

Clogged filters, dying motors, and other parts can cause weak airflow from your heater.

Cold Air

Furnaces blowing cold air could be due to your system overheating, the pilot light burning out, or a running fan or thermostat.

Constant Cycling

A furnace that frequently or constantly cycles will lead to high energy bills and less effective heating. It can be caused by clogged filters, a thermostat set too high or leaking air ducts.

More Than 10 Years Old

Most new furnaces have a lifespan of 15 to 20 years, but if yours is already more than a decade old, it could be time to start shopping for a new heater that will be more efficient and cost-effective.

Yellow Flame Instead of Blue

One of the most overlooked signs that a heater needs service is a yellow flame in a gas furnace, which means there’s dirt in your burner preventing the gas from being fully ignited, hindering efficiency.

Multiple Repairs Needed Recently

A furnace that keeps having issues is likely on its last legs or harboring an undiagnosed problem.

Clogged Filters

Filters that aren’t changed or cleaned frequently become clogged. Clogged filters prevent adequate airflow, allow grime to get into your system, and lower your air quality.

Ignition Failure

This can be caused by faulty controls, wiring, a failed ignition switch, clogged filters that caused the ignitor to burn out, or other problems.

Bad Air Circulation

Improper circulation inhibits the efficiency of your system and is usually caused by clogged filters or an issue with the fan, blower, or motor.

Oil Burner Issues

Low fuel levels, clogged filters, and faulty thermostats are all common issues in oil-burning furnaces.

Condensation on Windows

Some high-efficiency furnaces cause increased condensation by pulling air from outside into your home, which raises humidity levels.

Leaky Ducts

Ducts that aren’t airtight cause a drop in the effectiveness of your system and prevent the proper distribution of heated air throughout your home.


Obstructions are sure signs that a heater needs service. Whether it’s dirt, hairballs, or another blockage, any clog can cause a domino effect of trouble for your system, such as overloaded motors, loss of heat, and buildup of grime in your system’s parts.

Furnace Won’t Stay On

Furnaces come equipped with heat limit switches that shut them down when they overheat. If your furnace won’t stay on, it may be overheating. Overheating is one of the surest signs that a heater needs service, as it indicates dirty filters, blocked air vents, or other airflow hindrances.

Don’t Ignore the Signs That Your Heater Needs Service

The technicians at Air Masters are heater maintenance and repair experts who can effectively diagnose and repair your system. Contact us in Frisco, TX, to schedule affordable, reliable service.

Schedule Your Estimate or Service Today