Lennox furnace blows cold air and shuts off

Robskip Posts: 1, Reputation: 1

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Oct 10, 2010, 06:43 AM

Lennox furnace blows cold air and shuts off

Lennox furnace with electronic ignition. Thermostat calls for heat, unit comes on, blower starts, blows cold air for approx 3 minutses. Furnace then goes off. Cycle keeps repeating itself

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