Gremlin in my T-stat?

4Barrel

An odd occurrence this morning:

My White Rodgers (model 1F85RF-275) decided to go into a "hold" status all by itself. I have it programmed for a set back to 64 (I know there are cons to this), to come back up to daily operating temp of 67 starting at 6:30AM. I awoke cold, the temp reading was 62, and the T-stat in "hold." Even stranger, I swore I heard the exhaust fan pop on at the right time (I have a pre-venting system). So, what I think happened was:

- T-Stat signals for heat at the right time, system exhaust vent turns up.

- Shortly thereafter the T-Stat signals hold, causing the temp to drop below my "low" setting. since the boiler never gets going (hard to know if it fired or not).

This happened once before back in October, didn't think much of it. Is my T-stat fried, or could there be some other reason?

PS - I do have the T-stat on an iso-relay.

PPS - Should have mentioned that in the morning date and time on the T-stat were wrong as well.

crash2009

power failure?

Any other clocks in the house with wrong time?

jpf321

bad batteries?

bad batteries?



FYI, somewhat off topic .. i had a ritetemp touchscreen whose screen was no longer touchable after 2yrs.. they said .. yeah that happens .. brought it to Home Depot and they exchanged it (RiteTemp is a HD brand) with only few questions asked... 

4Barrel

No power failure

Thanks for the replies.



No, I don't think there was a power failure, as none of the other clocks were affected.

I changed the batteries at the beginning of the heating season, but I will swap out to eliminate that.



I guess I was wondering if this might be indicative of a T-stat failure itself, perhaps a result of a power surge from the transformer, from which the T-stat is drawing power...

crash2009

HOMEOWNER HELP LINE: 1-800-284-2925

I was just browsing through your manual and noticed that they have a phone number.  If you no longer have the manual here it is. 

 http://www.ntsupply.com/files/products/0037-6841.pdf

Maybe you might have better luck with this question over in Controls.

nicholas bonham-carter

ghost in the machine?

maybe it is the static shocks we get so many of in the winter.--nbc