With thermostat in HEAT mode, the display continuously flashes as if waiting for user to set time and date, but will not accept input. Gas furnace operates, but will not shut off unless mode switch moved to OFF. Rotary selector switch (SET, FILTER, RUN) has no effect on the operation of the unit in HEAT mode.

Asked by j on 03/13/2013 0  Answer

ManualsOnline posted an answer 11 years, 8 months ago

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