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Low or no heat from heater - blower runs

(2005 Buick LeSabre)
in Clayton, NC on January 16, 2011
Little to no heat from heater; blower runs; started before I changed thermostat - code was set; have tried to bleed air at thermostat valve.
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Popular Answer
of Tune Up Plus on January 16, 2011
it is possible the following happened:
1. switch is not working
2.blend door is not working (possible actuator)
3. electrical problem

this is a job for a technician to run down. these controls are all electrical and any can cause this. hope this helps!
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