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www.fixya.com/unsolved_problems/simpson_encore_pu Unsolved problems for simpson encore pu question. Get free help ... My simpson encore 757 shows PU error code. What is this? ... Simpson encore 556. Aug 22 ...
Does machine stop filling if you discnnect from power? If it does, the problem lies with timer/control unit, or fault in pressure switch/ tube. Check pressure tube (thin rubber pipe that goes from water level selctor switch to side of outer bowl) for holes- replace if faulty. You can test pressure switch by remove pressure tube from outer bowl and blowing thru tube- you should hear the water level switch click when you blow, and then click again when you release pressure.
If it keeps filling even with power off, you have a faulty inlet valve. If you remove top panel (3 screws along top rear-power off first!!), you will see the inlet valves- one for hot, one for cold. The valve is the thing the inlet hoses screw onto. New valves availble from any good spare parts supplier, relatively inexpensive part. Good luck!!
the manufacturer should be able to tell you what the error code means, look them up in your manual and call them or send them email. even though all codes may not be listed in the operating instructions they supply to consumers they will tell you when asked.