When I start the vehicle the a/c comes on and works fine when I rev up the engine the a/c stops working and the heater comes on. The compressor is still engaged. Driving down the road the heater is on. At a stop a/c starts working again I suspected a vacuum problem so I replaced the vac hoses under the hood. The check valve is working as it should. When the engine is off I can disconnect the vac line at the vac reservoir, it seems to be holding vacuum. I removed the lower inside panel and all of the vacuum pots (that I can see) seem to be working and holding. When I am driving down the road there is no problem with air shifting say from defrost to panel etc. The gauge readings on the high side and the low side are correct
have the same problem?
Monday, June 21st, 2010 AT 5:08 PM