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    mjbeecham's Avatar
    mjbeecham Posts: 1, Reputation: 1
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    #1

    Apr 14, 2007, 01:54 PM
    Honeywell RTH230B thermostat not blowing cold air
    I just installed a Honeywell RTH230B thermostat. Connected the four wires, per the instructions - Red to Rh (jumpered to Rc) White to W, Yellow to Y and Green to G. I live in Arizona, and have a split air conditioning system. The Air conditioning compressor unit turns on, the fan blows, but no cold air comes out of the ducts. I get a trickle of warm air that is being recirculated by the unit, but nothing else. The thermostate I took off was a Robertshaw, and the wiring was connected Red to Rc, Green to G, White to O and Yellow was connected to both Y and W. Any ideas what I'm doing wrong?
    JackT's Avatar
    JackT Posts: 260, Reputation: 19
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    #2

    Apr 14, 2007, 06:51 PM
    Is your unit just air conditioning or is it a heat pump? With the yellow wire connected to both Y & W tells me it's probably a heat pump, if so is your new thermostat for a heat pump? The white wire went to O on your old thermostat and O usually energize the reversing valve on heat pumps.
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
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    #3

    Apr 14, 2007, 07:01 PM
    If you need more help, see the sticky at https://www.askmehelpdesk.com/heatin...ons-58313.html. It has sections on both identifying a heat pump and thermostat wiring.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #4

    Apr 14, 2007, 10:05 PM
    Quote Originally Posted by mjbeecham
    I just installed a Honeywell RTH230B thermostat. Connected the four wires, per the instructions - Red to Rh (jumpered to Rc) White to W, Yellow to Y and Green to G. I live in Arizona, and have a split air conditioning system. The Air conditioning compressor unit turns on, the fan blows, but no cold air comes out of the ducts. I get a trickle of warm air that is being recirculated by the unit, but nothing else. The thermostate I took off was a Robertshaw, and the wiring was connected Red to Rc, Green to G, White to O and Yellow was connected to both Y and W. Any ideas what I'm doing wrong?
    Sounds like you had a make shift job from the get go. If you do not know if you have a heatpump or A/C turn the power of to the out side unit and remove the electrical cover.(Just two wires from the stat= A/C only- 5 wires or more= heatpump)Give more info we will try to help.
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