Mine in that location controls the bathroom vent fan. With the vent knob pushed up in "auto" position and the fan turned on, the thermostat will raise or lower the vent lid so the fan will turn on or off. There also is a rain sensor on the fan that will close the vent if water hits the sensor.
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[COLOR="Blue"]Doug, Robyn, Ross & Ryan
06 Travel Supreme Select 45'
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