Question about Honeywell CT3200 5-2 Day Electronic Programmable Thermostat Heater

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Honeywell 5+2 day programmable thermostat will keep heating to 29 degrees!


I have a gas furnace and central ac.

My old thermostat could be set at 15 degrees (c) and would only shut off the furnace at 25 (c), so I purchased a programmable thermostat to replace the old one (thinking that it must be broken).

Now the new thermostat won't shut the furnace off at all. I can set it at 19 degrees (celsius) and It will keep heating to 30 (i didn't let it go any further).

Is this a furnace issue or a thermostat issue? could i have improperly installed the new one? there were only 4 wires red, black , white, green. I had an old honeywell thermostat and now a new one the wire hook ups were pretty simple looking (red to R, green to G, black to Y, white to W)

pls. help!


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Re: Honeywell 5+2 day programmable thermostat will keep...

Our Honeywell thermostat is model RTH6300B. Now that the weather is getting hot, we decided to put the centeral air on. Hot air keeps blowing out. I called Honeywell several times thinking that we had fixed the problem. It still is blowing out hot air. Also, my husband checked the wires. Has anyone else had this problem? Any ideas what it could be?

Posted on May 29, 2008

Re: Honeywell 5+2 day programmable thermostat will keep heating to 29 degrees! - Honeywell CT3200 5-2 Day Electronic...

The screen if faded on the thermostat

Posted on May 15, 2008

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Re: Honeywell 5+2 day programmable thermostat will keep...

Is sounds like you wired it correctly, The black is a little unusual perhaps its blue, anyway, try disconnecting the wires from the thermostat and see if it shuts off. If so, then it may need to re calibrated. I will need some more info to help you anymore.

Posted on Dec 23, 2007

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