My furnace is not working properly. I shut down the whole electricity and also the switch on my furnice and waiting a few minutes to turn all back on. It will heat up the house and turns off automatically when it reaches my desired temperature setting. But when it needs to start back again it will lite up the fire and turn off about 3 times but never turn on. I have to keep resetting to get the heater to turn in. Changed the filter already and I did see a small light turn off and blink 7 times consecutively.
My furnace cycles once, then won’t ignite again. What could be wrong
furnace
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Best Answer
A red light flashing 7 times typically means the furnace is in lockout mode, which based on your description seems to be your situation.
There are many things that could cause the furnace to fail to light, each of which requires its own diagnostics to determine if it is the problem.
Since it sounds like you don't know much about furnaces, your best bet would be to contact a local licensed HVAC company.
Things that could cause a furnace to fail to ignite include, but are not limited to...