Need help w/replacing thermostat - http://www.hvacmechanic.com/ Forums
Original message
| Abbeyg
 |  "Need help w/replacing thermostat"
, posted Fri 7 Mar 14:23  
Am trying to replace Nordyne 903993 Type 1C26-123 thermostat with Honeywell RTH230B 230B1006 Thermostat--old nordyne cover does not have labels designating Rh Rc W Y or G-- Nordyne has color red, yellow, white & black wires--Honeywell has green, blue, red & white wires-- got it working as far as the A/C coming on, but the central heat doesn't come on...ANY help will be very much appreciated !!! Tried Honeywell's website & customer service--was told to look at at system for "power board" to find designated Rh, Rc, etc.--could not find it...Hoping can find something to match it up by colored wires!!! Really need help--suppose to be in the 20s in the morning!!! Thanks!!!
Abbeyg
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Replies:
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| oldmangobles
|  "Re(1):Need help w/replacing thermostat"
, posted Fri 7 Mar 17:33
what are the t-stat wires hooked up to in the furnace?you should have R,W,Y and G maybe C.jumper Rc and Rh at t-stat and run your wires to the t-stat according to the board.the colors dont mean jack unless they are connected to the right terminals.
old man mike
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