my 2003 mercury sable gs the air conditioner blows cold then hot back to cold and if I go fast it blows were the deafroster blows

Asked by Jul 14, 2016 at 04:36 PM about the 2003 Mercury Sable GS

Question type: General

not sure if ac in going out blows cold then hot back to cold and if i go over 30
it blows from the defroster

1 Answer

83,095

Sounds like you have a vacuum leak in the heater control system, could be a split hose, vacuum servos leaking, control switch leaking vacuum.

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