Question about Honeywell Programmable Thermostat Heater

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Honeywell RTH230B--Air Conditioner won't turn off!

Hello,

I just installed a new Honeywell RTH230B last night. I programmed it according to the directions and had it set at 71 F for the evening. I woke up in a 59 F apartment. My air conditioner will not turn off when it reaches the correct temperature! What happened? I wasn't exactly sure which cycle rate to put, but I don't think that would cause this problem.

Thank you in advance for any help!
Tanya

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5 Suggested Answers

  • 168 Answers

SOURCE: honeywell RTH230B

Normally, you should have 5 color wires: W-White, Y-Yellow, G-Green, R-Red and C-Blue.

The Blue wire is a common from the transformer on older systems, which is probably hooked to RC terminal.

Try this: Remove the blue wire and jump the RC to RH with the red wire and you will be fine. Blue wire should not be needed with the new thermostat.

This should also be stated in the instruction manual.
Hope this helps.

Posted on Feb 03, 2008

  • 1 Answer

SOURCE: Honeywell thermostat RTH230B

After several months of calling Honeywell (actually someone in India), I found what seems to be the solution. I think I became such a pest (they had a lot of complains from me in their record) that they put me on hold and called someone at Honeywell Corp. The solution was to "reset the microchip". You do this by holding down the "Mode" button and while holding it down, take the batteries out for a couple of seconds (still holding down the Mode button) and then put the batteries back in and release the Mode button. 10 days have passed and it has been working perfectly. Hope this doesn'f jinx it! Good luck.

Posted on Feb 26, 2008

Destinova
  • 46 Answers

SOURCE: problem with Honeywell RTH230B Thermostat

Sounds like you have it wired wrong..   Pop the top off and give me to color of the wires and tell me which letter each color wire is on.. that will tell us right away if you have it wired wrong

Posted on May 27, 2008

  • 1 Answer

SOURCE: Honeywell RTH230B

This my situation exactly.  Changing from a 6 wire manual round Honeywell thermostat to a 5 wire Honeywell programable.  Is there a way to maintain all functions?

Posted on Nov 25, 2008

  • 587 Answers

SOURCE: The thermostat worked correctly for months then

Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions
If you can’t find what you want, the bottom left and bottom of web
Page, they have homeowners assistance and Home products to get the help you need

Posted on May 10, 2010

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