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Topic: Vacuum Pump for AC & Heating on Front Dash--Information (Read 1623 times) previous topic - next topic
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Vacuum Pump for AC & Heating on Front Dash--Information

Yahoo Message Number: 147
The vacuum pump located in the front lower left basement door was running continuously. This is the pump that controlls the dash heating and air conditioner controls. After checking the lines for leaks and that the pump was pulling a vacuum I found the vacuum controlled switch under the right front dash cover. There are two adjustment screws on the device for in and out. A very small screw driver is required. I made one from a round tooth pick. After adjustment the pump will now come on pull a vacuum and shut off. The controls work fine and the pump will cycle to keep the required vacuum.
Al