Furnace short cycling

stubborn1

Hi,


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?

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HvacWiz

Check the condensate trap, it might be plugged up. Should be located in the blower section.

stubborn1

I'll double check it, but I don't think it's plugged. It's draining condensate pretty well.

__________________
Some advice you receive on the internet can be worth exactly what you paid for it - be careful.