DIYbanter - View Single Post - Blower and Ac Compressor won't stop running

wrote:

This is a 3 year old home. Tempstar furnace and ac unit with a White
Rogers thermostat.
Last night we noticed the unit blowing cold air. I found the Ac
running.The gas is cycling when the house temp falls below the set
limit. I pulled the breaker on the Ac to stop the compressor. The
blower still runs constantly with the gas cycling as required. Any
suggestions on additional trouble shooting. I'd like to narrow it down
either to the thermostat or the main unit.

Disconnect the wires to the thermostat at the furnace (remembering where
each went), turn the breaker back on, and see if it's still running.

If not, it's either the thermostat or the wires to the thermostat.

If it is, then it's something internal to either the main unit or the
compressor (my guess would be the relay on the compressor is frozen).

Be careful.

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