I just inspected a four year old home and have a question regarding a gas heating unit that would not engage. All elec. breakers and disconnects were ON, the air conditioning worked fine but the gas heat would not come ON. I waited for about twenty minutes in case there was a delay but to no avail. The gas utility was ON.
The outside temperature was 91 degrees F. Is it possible that there is a limit switch that prevents the unit from engaging at this temperature?
Any ideas as to the cause of this condition?
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