Honeywell RTH7500

[dna0603]

Hi,

I installed this t-stat in February 2005 and it worked fine through the heating system with my carrier heat pump. The heat pump says it was manufactured in 9/86... So it was the original one put into the home. I tried to get A/C this weekend and no luck. I went to the Honeywell website for troubleshooting and they suggested that I take out the wire going to the "C" (which for my wiring is the blue wire). I did that and it still is only providing fan circulation. Any suggestions would be greatly appreciated.

Thanks!

[m Ransley]

It could be alot of things like no power. My Ac would not start, breaker was on, so I reset it anyway and it worked.

[RP]

It could be anything, probably not the t-stat and definitely not the blower motor. Get out your VOM, your Gauge Manifold, your digital thermometer, and your EPA cert, and I'll walk you through it.

hvacrmedic

[Stormin Mormon]

I suggest you call a HVAC guy to come out and troubleshoot it for you.