Coronavirus Update: We care about your health and continue to service our customers safely. Read More

Skip navigation

HVAC Contractors
in the Phoenix Metropolitan Area

HVAC Contractors
in the Phoenix Metropolitan Area


24/7 Emergency Service


Cool Touch Air Conditioning and Heating Blog

Common Issues with Gas Furnaces

Gas furnaces do not pose a large safety risk. Although they use a gas that is combustible and potentially toxic to inhale, modern gas furnaces are constructed with safety features. If a homes gas furnace receives regular maintenance and any necessary repairs, it should pose no danger to you or your family.

When a gas furnace does run into problems, it’s important that you have the issues fixed as soon as you can and make sure that only professionals work on the repairs. Gas furnace problems can lead to a potential full breakdown as well as the hazard of carbon monoxide leaks. Stay safe with prompt work from an experienced company like Alaskan Home Services for your furnace repairs in Phoenix, AZ.

Some common troubles with gas furnaces

  • Dirty burner: The burner is the place in a gas furnace where the jets ignite that create the combustion gas used to raise the temperature of the air. A build-up of dirt and grime along the burner, or the development of rust, will restrict the oxygen available to the jets and make it more and more difficult for them to ignite. If your furnace uses a pilot light, a clogged burner could also cause it to go out. The burner will need to be removed and cleaned, and for this you will require professionals.
  • Failed thermocouple/mercury sensor: Depending on the age of your furnace, you will either have a thermocouple or a mercury sensor registering whether the pilot light is lit. If the pilot light goes out, the thermocouple or sensor will automatically shut of the gas supply so carbon monoxide will not flood the combustion chamber and potentially cause a danger of explosion. Thermocouples will need occasional replacement and sensors repaired, so make sure you schedule regular maintenance to catch these needs.
  • Cracked heat exchangers: The heat exchanger transfers the heat from the combustion gas to the air. If a heat exchanger develops cracks—usually because of corrosion weakening the metal—then it can lead to exhaust gases leaking into the cabinet or into your living spaces. If you suspect a heat exchanger problem (usually signaled by a loud clicking sound right before the blower fan stars up), then you need to shut off the gas supply to the furnace and call for repairs.

Use only professionals to solve these problems

Gas furnace repair is risky for amateurs to perform, and in some local codes it may be illegal for anyone who isn’t licensed to work on an appliance connected to a gas line. Don’t risk damaging your furnace or hurting yourself, let the pro’s at Cool Touch maintenance or repair your household furnace. Call us today 623-584-3762

Comments are closed.