Thermostat Problem

Old 01-05-10, 05:16 AM
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Thermostat Problem

My husband and I just bought a new house and we set the thermostat to 63 but the furnace doesnt shut off until its almost 68 or 70 in there. We have a forced air, oil unit. The thermostat is an old circular dial type as well. Would replacing the thermostat with a digital model help this problem? Thanks!
Old 01-05-10, 07:19 AM
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Take the cover off the thermostat and check to see if it has a small glass container of mercury, which acts as the switch to turn on the furnace.

If so, the thermostat needs to be dead level for it to register the temperature correctly. The correct way to check that is by using a bubble level. There are typically a couple of small plastic prongs to set a level against to check.

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