Furnace Thermostat Failure?

[49merc]

I have a 2007 Montana 2955l with what I believe is a faulty thermostat. Our last trip out the first cold morning I got up and turned the thermostat to 68 degrees where we usualy set it. Nothing happened and after waiting several minutes I turned it to 70.....still nothing.I then went to 72 and it finally worked. The bottom line is it won't work below 72 degrees. This is the Duo-Therm 3109228.001. A 5 button digital display. The only connections are a 4 wire phone type cable. I see no way to test this unit other than to buy a new one. Any sugestions?

[racerjoe]

I think there is a reset feature on these. I am trying to remember,but I know someone will be here to tell you how. Have you tried the search feature here? there are some past post on this problem

[racerjoe]

try this:
1. Turn slide switch to OFF position
2. Press and hold MODE (top) and ZONE (bottom) buttons
3. Turn slide switch to ON position
4. Release MODE and ZONE buttons
5. FF appears indicating reset is complete

[49merc]

Thanks Racerjoe. I will give that a try. I did do search but didn't see the same problem.
Bob