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Re: dishwasher not starting or emptying
Bit difficult to diagnose this but worth while splitting the door and carefully examining the wiring loom where it goes round the corner at the bottom of the door. its quite common to get breakages at this point as it flexes every time you open or close the door
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Sorry I only have more questions. If you observe the following things it may help rule out the thermostat or heating element . There are similarities to my problem. My dishwasher run for 4 seconds and stops briefly and starts again and will do that for ever.
1. Will it run properly in RINSE ONLY mode?
2. Does it run constantly or stop /starts continuously?
3. Does the soap dispenser open?
4. Does the timer count down? Ie cycle reads 2H and counts down, at least on my model.
5. Finally noticing if all the normal sequencing is happening. Ie turns on, pump empties the dishwasher, fill occurs, arms spin, and so forth. you should be able hear the unit empty and refill again and the rinse light goes on.
Sorry I could'nt be more help but possibly we can help each other.
All of the things that you are describing are controlled by transistor circuits, and relays, and solenoids. The next time it fails would be the time to call a service repairman with the test equipment and training to locate the failing circuit card or component and replace it. The ticking sound could be a bad relay chattering or a defective solenoid opening and closing. There is no way to diagnose the problem remotely. Even if there were it would require special training to locate and replace the part. Hope that is helpful.
When I start a new cycle, I first hear the pump run to empty out all
remaining water, and after that I hear the motor run for the regular
washing cycle, but there is no water in the dishwasher. After a few
minutes, the cycle stops, and the washer claims the dishes are 'clean'.
When I try starting a new cycle over and over again, about one in 20
times, the cycle will run normally with water. But then the next time,
the problem starts all over again. Once a cycle starts correctly,
everything works fine, including the rinsing.
The first thing a Bosch dishwasher does when you start a program is run the waste pump. This ensures that any residual water and waste is removed from the machine before the wash program begins.
The hum you can hear is most likely the pump motor trying to drive the impeller. This can become clogged with waste and seize up, preventing the wash cycle from starting. There is an easy way to check this:
(It's easier to do this with the washer empty)
1: Select a wash program
2. Press "Start" and wait for the humming noise
3. Open the door and pull the bottom basket forward or lift it out completely
4. Find and lift the float (the plastic dome/mushroom in the bottom of the washer) all the way up
5. Keep the float lifted and the dishwasher should pump out. Stop if/when you hear a gurgling noise as this means it's empty and pumping mostly air.
6. If the pump doesn't start, lift the float again for about 1-2 seconds then let it drop again for 1-2 seconds. Repeat this 10-20 times and see if the pump starts. The repeated stop/start signals to the pump motor can sometimes free a seized impeller.
If the pump does start, keep lifting and dropping the float switch (1-2 seconds each time) to see if the pump starts every time. If it does, you should be OK to use the washer, but further action is needed to stop the problem returning.
When you've done all this, post the results here and I'll advise you what to do to fix the problem or prevent it from returning.
These mechanical timer machines have to follow a series of logical steps to complete the program - ie, empty. fill to level 1. wash. heat to temp. etc etc
My guess is the machine is not heating, as you say it works for part of the program - or possibly it is not emptying correctly? check water heating element and drain pump.
Program 4 eco is a separate program from 3, using low temperature washing - the machine does stop between 3 and 4 normally and doesnt carry on through.