4 Possible Reasons Your Furnace Isn’t Working
1. Air Filter Needs to Be Replaced If your furnace is running, but there is little to no hot air blowing out of your vents, you should first make sure your air filter isn’t clogged, as this will limit the amount of air coming into the furnace and, thus, how much heat it produces. A clogged air filter can also cause your furnace to overheat and shut down. Should this happen, your furnace won’t turn on again until it has had time to cool sufficiently. In some cases, your heating system will also need to be reset after overheating before it will work again. 2. Flame Sensor Is Dirty If your furnace lights and then almost immediately shuts down, it usually means that the flame sensor is too dirty to work properly. The flame sensor can also fail due to age. In either case, the flame sensor won’t detect that the burners are lit, which leads to the gas valve closing and the furnace shutting down within a few seconds. 3. Fuel or Electricity Supply Issues If your furnace won’t come on at all, you should make sure that the circuit breaker isn’t tripped. Your furnace obviously also won’t work...
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