Question about Bosch Dishwashers
Hello I have a Bosch dishwasher model no: SGS43t22.The fault is It will not drain on any programme.have tried unblocking pipes.
It's most likely a fault with the control module or the drain pump. Please follow these instructions to detemine the likely cause of the fault and, therefore, what to do next:
1. Turn the programme selector to any wash cycle but don't press start.
2. Open the door and pull out the lower rack
3. If the washer is dry, pour roughly a pint of water into the sump in the bottom of the washer
4. Locate the float (the mushroom) and lift it . . .
When the float is fully lifted (about 3/4 of an inch) the drain pump should start and drain any water from the washer. This activates the anti-flood safety feature and the pump should continue to run as long as the float is lifted. The power supply to the drain pump bypasses the controller so this is the best way to determine if the drain pump is faulty.
If the water drains when you lift the float . . .
The drain pump is working but it's not receiving the signal to start from the controller during a wash cycle. It may be a wiring problem, but more likely that your control module will likely need to be repaired or replaced. These cost about £100 - if you replace it yourself.
If you can hear the pump humming but water does not drain when you lift the float . . .
There may be a blockage somewhere or the pump impeller may have jammed or broken away from the driveshaft. Try lifting and dropping the float rapidly about 10-20 times. Repeated stop/start signals to the pump motor can free a stuck impeller.
If nothing happens when you lift the float . . .
There is either no power to the pump motor or, more likely, the pump motor has failed. You will need to test the motor to determine whether or not it needs to be replaced. You will need a Torx T20 screwdriver or screwdriver bit to remove the kickplate under the door and an ohm / multi-meter to test the motor.
The drain pump motor should give a resistance reading of between 110 and 260 ohms across the live/hot and neutral/common terminals if the motor is good. In most cases, the reading is about 160-170 ohms.
I'd suggest testing the drain pump using the float as detailed above, then let me know the results. I'm happy to provide further assistance once the likely cause of the fault has been determined.
Hope this helps.
Posted on Apr 10, 2011
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Posted on Jan 02, 2017
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