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Pressure switch fault will not let water fill.


Warren

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Hi Andy I have read through your faults pages but not found the same fault hope you can help. I have a zanussi zwh7122j PN 91490492501. I have just moved, when I had to move the washing machine installed drum bolts and moved on it side in the car. When I installed in the new house the machine would not fill with water. Checked the water supply, which is good checked filters which were clean, checked the solenoids with a meter and they were both good, checked the pressure pipe and chamber which were both clean and good, when I take the pressure pipe off the switch and operate with my mouth the machine begins to fill so i connect the hose the machine fill to the correct level and begins it wash cycle, at the end of the wash it pumps all the water out but will not fill for the rinse. Took the pressure hose, chamber, and the rubber connector to the bottom of the drum off also checked the main filter all was good. So bought a new pressure switch from zanussi fitted it but the machine acts the same, I havent operated this one by my mouth, have filled the drum with 3 liters of water and drained as a reset for the pressure switch but its still will not fill unless I put the old switch back on and operate by mouth. All the progams seem to work except from the fill. Please help if you can cause im at a complete loss. Any help very much appreciated, good site by the way. Warren.  

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That's strange. If you blow into a pressure switch you will probably operate the overfill switch. That should start the pump running. Blowing into the switch should only make it stop filling or start pumping. For the washing machine to fill the pressure in the switch needs to be off. If the fault only occurred after moving and the water supply at the new location is definitely OK then chances are water may have run down onto the pcb and damaged something.

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Hi Andy thanks for the reply, I should have been more accurate, I blow then suck just to move the diaphragm inside the switch then it lets in water. Tried on a super quick wash cycle and it even rinsed. When i put the machine on a full wash cycle it will pump for 15 maybe 20 seconds then nothing with either pressure switch ( even with the pressure pipe taken off ) its at this point I operate the switch with my mouth. When I transported the machine I laid it on its side so the pcb was at the highest point. Let me know if you think of any thing else I could try. Cheers 

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  • Root Admin

Hello Warren. Be careful holding the pressure switch with the machine live!! That's stranger still. If sucking down the pressure switch causes water to go into the machine it seems to implicate the pressure switch but if you replaced it (with the correct one and wired it correctly) it should have cured it. The only thing I can suggest at the moment is to carefully read my articles on the pressure system and see if they give you any better understanding

How a washing machine controls water levels

Faults on washing machine pressure system

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Warning:  Read this before attempting any diy repairsNo representations or warranties are made (express or implied) as to the reliability, accuracy or completeness of advice. I can't be held liable for any loss arising directly or indirectly from the use of, or any action taken in reliance on, any information on this website, which is given free of charge and in good faith.

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