I have a Lennox gas pack - last week the fan started running non stop and the thermostat went blank. It doesn't heat or cool now - just blows air. Any thoughts?
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I have a Lennox gas pack - last week the fan started running non stop and the thermostat went blank. It doesn't heat or cool now - just blows air. Any thoughts?
There could be a number of causes but I would start by checking for an open limit. An open limit shouldn't normally effect the thermostat display but if the limit breaks "common" & your stat is powered from the furnace, it's possible.
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