heater in 2007 mustang doesnt blow heat when stopped or in park

Asked by kathaz9livez Oct 24, 2013 at 08:17 PM about the Ford Mustang

Question type: Maintenance & Repair

ac works great  HEAT doesnt work when stopped at lights or when in Park

1 Answer
13,275

Fordtudor37 answered 10 years ago

Sound like you need to replace the vacuum controlled heater/defrost manifold. Its a vacuum control manifold is what the switches are attached to, that control the amount of heat, direction of air flow and air fan speed on the dash board. It is a vacuum run unit that is known for failure over time.

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