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

    Jun 1, 2006, 08:45 AM
    Help with new Honeywell RTH7500D
    Hello Everyone. I just bought my new thermostat and installed it. Using my old thermostat, an old mercury White-Rodgers, I wiring the Honeywell to what I thought was a "conventional" system. I have gas heat and electric A/C. Outside I have the fan unit which blows air into the compressor and for heat, heated by the gas, and for A/C, the compressor cools it.

    When I fired up the A/C with my new thermostat everything seemed to work well. The cool air come on and went to my programmed temperature. However, when it reaches the temp (slowly I might add), it doesn't shut off. I've noticed the air will shut off for 5 or 10 minutes and then come right back on.

    Is this a wiring problem or simply a bad internal thermometer?

    Any help is GREATLY appreciated!
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Jun 2, 2006, 05:44 PM
    See if your new stat offers settings to change the "starts per hour" , you may need to experiment to find the best to cool the area and keep cool, try 3 starts per hour and go from there.

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