Hi,

Can anyone please help me out with some ideas?

The heater is installed in the basement. I program it to be at 22 degrees. It works fine most of time, but sometimes it will drop to 18 degree.

From the sound of the system, it is still on. And the blower blows for 2 seconds, stops for 10 seconds, blows for 2 seconds... on and on. The air from fan isn't warm during this time. I would think the blower should keep blowing until the temprature reaches what I set.

But it only happens intermittently. So it really drives me nuts. 18 degree is not dying but I live in a cold place so it still gives hard time.

Can anyone please help with some suggestions?

Thanks in advance!

To answer my own quesiton: so it turned out to be the flame sensor. Cleaned it with sandpaper and the current is back to normal.

Learnt a lot on this site!