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Thermostat problems I have a thermostat 9600 Robertshaw and I have to use the trip switch to start my furnace. Then it reaches the temperature and sometimes it will kick in by itself but majority of the time I have to trip it. I have changed the batteries cleaned the thermostat,and reset it. Is it time for a new thermostat and can I replace it myself. Thanks

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Have you confirmed that the thermostat is programmed correctly?

Did the thermostat ever control the temperature of the house properly?

When you indicate "kick", are you talking about flipping the Auto-On switch back and forth? The Auto-On switch only controls the fan, and no heating or cooling (Auto - fan runs on call for heat or cool, On- fan runs all the time.).

If "kick" means making the heating work, and if you have the same problem for making the cooling work, chances are good you have bad thermostat.

If the problem only occurs with the heating, and cooling works fine, then the problem could be in the controller board of the furnace, assuming you have a more recent (1990's or newer) furnace.

Posted on Jan 16, 2009

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