I think the furnace in my cabin may be short cycling. It's a 10-15 year old high efficiency Rheem furnance. I noticed that the burner only runs for 60 seconds before cutting out only to refire again in 2-3 minutes and run for another 60 seconds and so on. Here's what I know so far:
- Fan blower motor runs all the time. (stat doesn't have a Auto/On setting)
- Vent motor seems to be working - I can stand outside and hear it run and watch it exhaust.
- It's not cutting out because the temperature has been met - it only caught up to the set point during the day yesterday.
It was -2 F this morning and I was still able to hold 58 degrees in the main part of the house. Luckily I have a wood stove in the addition that keeps that part of the house toasty.
What could some possible problems be?