I have a problem with my 2007 Mercury Grand Marquis. Whenever I press down on the accelerator, whether just picking up speed or going up a hill, the stream of cold air coming from the air-conditioner stops. This lack of A/C typically lasts 12 to 15 seconds. In the hot summertime, you can be sweat…

A/C cuts out when accelerating

EllyEllis September 3, 2009, 7:11pm 2

Well, it may be that the compressor cuts off under heavy acceleration, but I would suspect a vacuum problem letting the blend doors to close.