Bosch Exxcel 1200 Pump Running Nearly Continuously
A little bit of a saga, I'm afraid. I've tried the advice on this site but my problem doesn't seem to be covered.
My Bosch Exxcel 1200 gave up on spinning a few days ago. I checked the filter bay and the impellor was working ok and I removed a small bit of plastic that was sitting in the bottom. The area was almost as clean as the day it was maufactured; impressed!
My attention turned to the motor. I had to put the machine on its side to get to it (the back panel only has the "teardrop" access panel to get to the belt). The brushes were badly worn, so I replaced them and disassembled the motor to clear out the carbon dust. I reassembled the motor, reassembled the machine and stood it up.
When I selected a programme the countdown display very briefly flashed up and then went blank. This behaviour was constant yesterday after my repair, but seems to have sorted itself this morning. Water in the electrics, a software reaction to something or a connection disturbed by being on the tilt? No idea.
Despite the display issue I put the machine into a spin cycle and it worked (including the "Wash", "Rinse", "Spin" and "Ready" lights, though only the last two needed for a spin cycle). Or it started out working (and spun very well, thank you); at the end of the cycle the pump just ran and ran, the machine refusing to shut down.
This problem is now persistent. If I turn the machine off for a prolonged period (several minutes) then it will start a programme but go into "drain" pretty quickly. If I turn the machine off for a shorter period it will start draining as soon as I select a programme.
The drain is working; I put several pints of water into the drum and it's carried away ok.
I've perhaps dislodged a connector somewhere or some gunk has been moved onto a sensor by putting the machine on its side (how else are you supposed to get at the motor with no removable panels??!!). Can anyone suggest anything I can do to get the machine running again, please?
Many thanks,
Rob.
Solution Summary
AI-generated from this discussion
This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.
Bosch Exxcel 1200 pump runs continuously after machine was laid on its side
- The problem
- After worn motor brushes were replaced, the Bosch Exxcel 1200 would spin, but at the end of the cycle the drain pump kept running and the machine would not shut down. The display had also briefly flashed and gone blank after reassembly. If left off for several minutes it would start a programme then go into drain quickly; after a shorter off period it would begin draining as soon as a programme was selected.
- Likely cause
- The accepted reply says laying the machine on its side can let water reach the PCB, causing odd behaviour. It also states an insulation fault on components such as the motor or heater could cause these symptoms. The exact fault was not confirmed.
- What fixed it
- The accepted advice was that the symptoms were most likely due to moisture affecting the PCB after the machine had been laid on its side, which might clear after drying out, or an insulation fault requiring proper testing. No confirmed repair was documented. Further diagnosis should be carried out by a suitably qualified appliance engineer.
- Checks to try
- Filter bay checked
- Pump impellor checked
- Small piece of plastic removed from filter area
- Motor brushes found badly worn and replaced
- Motor dismantled and carbon dust cleaned out
- Spin cycle tested and machine did spin
- Drain function checked by adding water to the drum
- Parts or tools mentioned
- Motor brushes
- Insulation test meter capable of testing at 500v DC
Safety: Further diagnosis should be carried out by a suitably qualified appliance engineer.
1 Answer
You have to be careful about laying a washing machine on its side as water can potentially get onto the pcb which are often fitted at the base of one of the sides. If you have to lay one down I'd lay it on its front.
Insulation faults can cause weird symptoms, insulation leaks on the motor or heater etc. A proper insulation test meter capable of testing at 500v DC would be needed to check though. If it's related to water getting in somewhere it may dry out after a day or so but I can't see it being anything to do with dislodged connections.
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