Furnaces have several types of sensors and automatic functions that will trigger a shutdown for safety reasons. Let’s review the main issues that will shut your Westminster, MD, furnace down because of a hazard or malfunction.
An Oversized Furnace
An oversized furnace is likely to turn on and off too much, which will increase your energy bills. There isn’t a safety problem in this case, but you will hear it turn on and off often.
A Damaged Igniter
Newer models have a hot surface igniter that will trigger an automatic shutdown if it malfunctions. Some older models have a pilot light that will do the same to prevent gas accumulation.
A Malfunctioning Fan Limiter
The fan limit switch keeps the system from overheating, which can start fires or damage components. Overheating can lead to cracks on components, and that might lead to carbon monoxide leaks or other hazards. The furnace may turn off early when the fan limiter needs a repair or replacement altogether.
A Dirty Flame Sensor
Newer furnaces have a flame sensor that lets natural gas flow when the flame is on near the burner. Older furnaces have a thermocouple with the same function, and problems with either will trigger a shutdown. The gas valve and furnace will shut down to prevent fires caused by natural gas buildup.
A Clogged Flue
This can happen if a bird or rodent nests inside the flue. Be aware that objects can fall into flues on occasion. The flue limiter will shut the furnace down to prevent carbon monoxide poisoning and other dangers.
Don’t let your furnace turn on and off all the time while you try to stay warm. Contact the experts at Siegman Forced Air Systems, Inc. for quality maintenance and repairs that will make your furnace last.
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