Forum Discussion
kmb1966
Jul 24, 2018Explorer
dougrainer wrote:
ALL Class A motorhomes have aftermarket Dash AC systems. They have inherent Vacuum leaks. Always have and impossible to fix. The actuators are the culprits as they are not 100% leak free. When you go to zero Vacuum on full throttle, the vacuum reservoir runs out of vacuum. The default is then to go to defrost. As the other poster showed, get the Ford 12 volt vacuum pump. It will mount on the firewall up front by the rest of the controls from the outside. You will see a round black ball with 2 small hoses and that is your vacuum reservoir. The larger hose is connected to the engine manifold vacuum. THAT hose you remove from the reservoir and plug. The vacuum hose from your new 12 volt pump connects to that vacuum reservoir ball. Connect ground and 12 volts to your ignition side of the chassis and your problem is fixed. This is the same system Diesel Motorhomes use. Doug
at the very bottom of this link when you click will be a pic of the most common Pump and reservoir.
http://www.evanstempcon.com/service_parts.php
****AWESOME ****
THANK YOU!!!!
THIS MIGHT BE A PROJECT I CAN DO MYSELF! THANKS AGAIN!
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