Suspension Fault - Normal Height Only - Pressure does not decrease

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alfapat

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Ressurecting an old thread here , I have same issue , is it worth doing a valve block clean out . I have reknewed the AMK WITH A sercice kit and still get the rising slowly fault C1A20-64
 

CoopLR3

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I cleaned out my rear valve block 5 years ago, and replaced some of the o-rings from the local hardware store. It was full of dessicant powder. Still works fine. C1A20-64 = pressure rising slowly. I've had that code several times. Once was due to a bad voss fitting in the front valve block, another time it was a bad compressor, another a cracked dryer, and recently leaky pressure swiitch.
 

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