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I have a 20 year old honeywell quartz air/heating control. I'm not really sure how to use the heater. It has two separate toggles at the top (one blue and one red), a button that you push "up" at the bottom, which appears to turn this dial inside to either red or blue, a clock thing that doesn't work, or at least appears to do nothing. The air comes out warm for a bit, and then goes cold.

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The Blue knob is for cooling the red for heating. I would reccomend replacing it due to the fact the age and it probably has yrs of dust built up on the mercury bulbs which can throw the tempurature off. Dust on these old mecury style thermostats is its worst enemy. The bulb is very sensitve and enough dust can throw the bulb of several degrees.

Posted on Dec 21, 2008

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