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Re: furnace doesnt come on
said by seandrom :Our furnace is much older with no electronic filter but ... a few years ago something like this happened.
Furnace is at least 7 yrs old. Any suggestions as to what the problem could be? Electronic or just a bad filter unit?
The HVAC guy came and changed the flame sensing element (aka thermocouple) and charged me $$$. If it happened again, I think I could do it myself.
I am curious how you are sure that the thermostat is working properly. Have you actually checked heat call relay tripping by adjusting the temperature settings?