I have a question on the cycling of my NG furnace. When called upon for heat it fires up but only stays on for 3 to4 Minutes then shuts off and stays off for about 5 to 7 minutes. It’s not even close to reaching the temp. that has been called for. Needless to say, this never brings the temp. high enough to make a difference. I thought that maybe it’s a faulty thermostat but I have never had any problem with cooling and short cycling. I have called to get my unit serviced but I am looking for information I why is this so and what component could be causing this problem.
Thanks in advance.