cent air
Recently changed thermostat on gas furnace,honeywell no-programmable,and now a/c not coming on,and cant run fan only....the heat works perfectly...questioning placement of rh n rc terminals....wire colors are red blue yellow white and green not ruud ubhc
Heating & Cooling - Ruud - UBHC Air Conditioner
Answers & Comments
Unfortunately, a strick standard does not exist for wire terminals and colors. However, there are "norms" which I will be happy to share with you.
Red - Rh & Rc (Jumpered)
Blue - C
Yellow - Y
White - W
Green - F
Note: this is assuming you have only ONE transformer in your low voltage circuit for both heating and cooling. If there is a low voltage transformer at your outdoor unit you will need to seperate Rc & Rh. At this point, I have to recommend a trained, qualified service technician. A good service technician should be able to resolve the wiring issue in under 30 minutes.
http://www.youtube.com/watch?v=_HyhUyU-AMI
I only wish I was able to look at exactly what you have to include tracing all the wire back to the furnace and condensing unit. Tracing the wire is the only sure-fire wire to do the job correctly.
I wish this could have been a black & white answer; however, I do hope you found this information helpful in your endeavor. Good Luck to you! :-)