Latest Discussions : HVAC


11:27AM | 11/16/02
Member Since: 11/15/02
1 lifetime posts
Our Lennox Whisper Heat C16 furnace becomes non-responsive to the thermostat after 6 to 30 hours of use. First step to failure: the thermostat calls for heat and for a short time the fan blows COLD air. Final step to failure: The furnace and blower quit completely.

To return the furnace to a functional state we turn everything completely off at the thermostat, wait a few moments and turn it back on (heat, auto).

We replaced the thermostat and verified that all wires are connected to the proper receptor. [G=Green(Blower/Fan), Y=Blue (Cool), W=White (Heat),R=Red(Power)]

The intermittent failure continues.

What would you recommend?

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