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In this video, I diagnose and repair my faulty RV 12VDC freshwater pump. Turns out the microswitch, part of the water pump’s pressure switch assembly, was intermittent. A new inexpensive microswitch solved the problem. Installation was straightforward, only requiring unscrewing 4 screws to access and replace.
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Source: RV 12V Fresh Water Pump Repair – Replaced Faulty Microswitch




