New answers tagged heat
I'm thinking @SteveMatthews may be onto something - If the HVAC system is vacuum operated, one of the vacuum actuators is having an issue (ie: leaking). It may be getting adjusted without you having to do anything. When you shift gears, you take your foot off of the "go pedal" (not a gas pedal in this instance because it's diesel power ;-)), which causes a ...
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