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Frequently I cannot increase or decrease the thermostat on the heat/air conditioning in my 1991 Cadillac Brougham. When I push the button to change the temperature that is set just does not change. Then at other times the button changes the temperature easily. What is happening? And how can this be fixed?

Answers from the Automotive Experts

Gelina Aquilina, Service Advisor / Mechanic at There's a motor in the dash that controls the blend door, sounds like that may need to be replaced.

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