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| Q |
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My fan, furnace, or AC runs all the time, why?
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| A |
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Remove the thermostat body from the wall. If it continues to run, there is a furnace problem. If it turns off, check the settings on the thermostat, and check the jumpers on the back of the unit. They should be in the default settings as shipped. Then reset and re-install the thermostat.
Or, if your HVAC system is running continuously and the room temperature is not changing, the problem may be the HVAC system cannot keep up with the heating or cooling settings because of outside temperature extremes. All the thermostat does is turn on and off the system as per the target temperature vs the room temperature. If the room temperature never gets to, or crosses the target setting, the thermostat is not going to shut the HVAC off. Also, check your air handler filters, as dirty filters make a big difference.
HEAT: Lower your target temperature 5F below your room temperature, the furnace should shut off in a few minutes, which indicates the thermostat is working.
COOL: Raise your target temperature 5F above your room temperature, the cool should shut off in a few minutes which indicates the thermostat is working.
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