No heat: Furnaces have many components, and a malfunction with lots of these can result in a furnace that doesn’t produce heat. Some of the most common components involved include the gas, power, thermostat, heat exchanger, and ignitor.
Producing heat but blowing cold air: This means the furnace is working properly but not circulating air the way it should, and the blower motor or a belt in the motor is usually the problem here.
Strange sounds: Mechanical failures and malfunctions do happen, and when they do the furnace will often make whistling, rattling, squealing, gurgling, or other noises.
Gas smells: If your furnace smells like gas, shut off the gas valve, open some windows, and get everybody out of the house. Once you’re safely outside, call your utility company to report a potential gas leak.
Overblowing: If your furnace is blowing too much air, then it could be an issue with the control board or a problem with the thermostat.
Leaking: High-efficiency furnaces produce condensation, which can leak and pool on the floor if a pipe inside breaks or isn’t fitted properly.
Cracks, corrosion, strange smells, or soot: All of these could mean your heat exchanger is cracked, and this needs to be addressed immediately because a damaged heat exchanger can mean dangerous gasses are leaking into the air you breathe.
Furnace maintenance and repairs are crucial to the health of your heating system and the comfort and safety of your family, so it’s important to choose a trusted, reliable, and certified HVAC company when your furnace needs help.
If you don’t already have a company you can depend on, you can use our independent HVAC contractor certification program to find a local company that will have the skills and knowledge to address and fix any furnace problems you may be experiencing.