I've got a strange problem.

It started this winter, I was flipping breakers off and on trying to find where they went. Got the furnace one three times, and every time it would 'die'. Had the professionals out only to have it cycle on when they got here 4-5 days later. All three times!

Recently, I had to flip the breakers going to my old well off, accidently got the one going to the blower unit/a/c/furnace.

Same issue, but now it's set to a/c. I've reset the thermostat, I've flipped every breaker, the main panel, and ones on the unit itself. No luck. It was working fine before I flipped the breaker. Now I just get silence.

Thermostat clicks to 'cool' (I can hear it click) but it has never turned the fan on when you switch to "fan-on" from "Auto"

Any suggestions/insight is greatly appreciated.

 

sounds like the thermostat is holding the unit off during a simulated power failure...check the manual for something like that.if you have a control board in the furnace that might add to the restart delay....one way to prove it is the stat is to pop the stat off the wall do a power down power up then manually jump R/G fan, R/Ycool, R/W Heat if they respond with the jump its the stat holding out on you.

 

Jumping the cables fired it right up, thank you!

Looks like I'm off to buy a new thermostat.

 

Got the Honeywell RTH7500 series.

Wired it in, powered everything up... nothing. Waited 10 minutes. Pulled the cover off, jumped the wires, nothing.

Pulled the whole shebang back off, made sure my wires were good (jumped them, got a response), put it back on the wall. Re-powered up the furnace, jumped it and things came on.

Put the face back on... nothing. Now it's been 30 minutes of nothing.

What would make the thermostat incapable of talking to the unit? Edited to say the original was a Hunter 44300a thermostat.

 

After much fooling around it appears I have a loose breaker, nothing to do with the a/c or thermostat. Oops.

That's a whole different battle... Will tackle that one tomorrow.

Thanks again!