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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Dishwasher not filling
Our 15 year old Bosch dishwasher has stopped filling although the
heater still comes on. I've checked the water inlet valve for blockages and put a meter across it which has given a reading within expected range. Haynes Dishwasher manual suggests a pressure system fault is most likely but it's pretty vague about how to diagnose/solve the problem --- "The pressure system has no standard design or location" --- so I'm struggling to know what I should investigate next. I can't see an obvious, separate pressure switch but there is a large plastic matrix behind the side panel. Photos of innards he http://img836.imageshack.us/img836/6492/dishwasher.jpg http://img696.imageshack.us/img696/2971/dishwasher2.jpg Any pointers as to likely problem / location / solution would be much appreciated. |
#2
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Dishwasher not filling
On Dec 4, 10:08*pm, mike wrote:
Our 15 year old Bosch dishwasher has stopped filling although the heater still comes on. *I've checked the water inlet valve for blockages and put a meter across it which has given a reading within expected range. Haynes Dishwasher manual suggests a pressure system fault is most likely but it's pretty vague about how to diagnose/solve the problem --- "The pressure system has no standard design or location" --- so I'm struggling to know what I should investigate next. I can't see an obvious, separate pressure switch but there is a large plastic matrix behind the side panel. Photos of innards he http://img836.imageshack.us/img836/6...ishwasher2.jpg Any pointers as to likely problem / location / solution would be much appreciated. I suspect the water level switch might be that big white job in the middle of the 2nd pic. You've got a water cavity with what looks like a float that operates it. I'm guessing you resistance tested the solenoid. Check if its getting voltage when the pwoer is on and wash cycle starting. NT |
#3
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Dishwasher not filling
On Dec 5, 6:07 pm, Tabby wrote:
On Dec 4, 10:08 pm, mike wrote: Our 15 year old Bosch dishwasher has stopped filling although the heater still comes on. I've checked the water inlet valve for blockages and put a meter across it which has given a reading within expected range. Haynes Dishwasher manual suggests a pressure system fault is most likely but it's pretty vague about how to diagnose/solve the problem --- "The pressure system has no standard design or location" --- so I'm struggling to know what I should investigate next. I can't see an obvious, separate pressure switch but there is a large plastic matrix behind the side panel. Photos of innards he http://img836.imageshack.us/img836/6...ttp://img696.i... Any pointers as to likely problem / location / solution would be much appreciated. I suspect the water level switch might be that big white job in the middle of the 2nd pic. You've got a water cavity with what looks like a float that operates it. I've had problems with soap and crud getting into the float chamber, so that it thinks it's full when it isnt. The micro switch should be easy enough to test. |
#4
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Dishwasher not filling
On Dec 4, 10:08*pm, mike wrote:
Our 15 year old Bosch dishwasher has stopped filling although the heater still comes on. *I've checked the water inlet valve for blockages and put a meter across it which has given a reading within expected range. Haynes Dishwasher manual suggests a pressure system fault is most likely but it's pretty vague about how to diagnose/solve the problem --- "The pressure system has no standard design or location" --- so I'm struggling to know what I should investigate next. I can't see an obvious, separate pressure switch but there is a large plastic matrix behind the side panel. Photos of innards he http://img836.imageshack.us/img836/6...ishwasher2.jpg Any pointers as to likely problem / location / solution would be much appreciated. There is usually a small chamber adjoining the main "sump" with a pipe about 20or30 mm dia. This has another small bore pipe connecting the pressure switch to it. The PS is located well above the water line. This pipe can block and the chamber can fill up with crud. The pressure switch is usually circular, about 100mm dia. If you disconnect the pipe from it, you should be able to blow down it and hear air bubbling in the water. If you can't blow down it, it's blocked. The PS can have up to six wires attached and is usually two(No)two way switches, set at different pressures. You can blow into this (gently) and you should hear them click. Just occasionally they click but don't make contact. You need a meter to check this. One switch is to control the fill. The other is to stop the heater coming on when it's empty. |
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