Question about Heating & Cooling
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Posted on Jan 02, 2017
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
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
SOURCE: My furnace works intermittently.
You may have a dirty flame sensor. There are a number of other possible causes as well. Rheem/Ruud/Weatherking furnaces also have problems with the connection on the blower deck.
The flame sensor sometimes must be bypassed around the MOLEX CONNECTOR in the deck due to humidity.
Hope this helps.
Posted on Jan 15, 2009
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