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    Wilson2's Avatar
    Wilson2 Posts: 1, Reputation: 1
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    #1

    Sep 1, 2007, 12:55 PM
    Honeywell RTH230 Programmable Thermostat
    We have replaced our old thermostat with a Honeywell RTH230 programmable, and it's been over 30 minutes and the a/c has not kicked on. Is there anything that we should check or do?
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #2

    Sep 1, 2007, 02:12 PM
    Re-check your wiring. If the new thermostat has terminals 'Rc' & 'Rh', there should be a jumper between them. If the old t-stat was mechanical and the new one has a 'C' terminal you may have to connect the low-voltage common wire at the indoor unit.
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
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    #3

    Sep 1, 2007, 04:37 PM
    Check your thermostat to insure that it is calling for cool, this thermostat does not use a "c" or common wire but it may not be programed properly, press the mode button to cooling and lower the temperature with up-down arrows. Good luck, Mike
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