Pressure Switches Etc Zanussi Won't Spin Fast
My 3 or 4 year old Zanussi Jetsystem 1200 (FJS 1225 W) won't spin fast anymore. The drum "kicks" and then idles / chugs at a very low speed when trying to spin. The drain pump is running in the background.
The drum spins easily by hand. Running with no load makes no improvement. I have cleaned out pipes, blown down pipes etc and have removed a TINY bit of muck ... but to no avail.
I also killed the processor unit by making it wet when I tipped the machine on its side - but 30 minutes of warm hairdryer brought it back to life!
The processor relays click at regular intervals during spin mode - the motor jumps into life ... and then slumps as soon as each spin cycle starts ... I do NOT hear any relay "drop out" when the "slump" happens. So ... does any other circuit OUTSIDE the processor box have the capability of slugging the motor?
Also, what is this pressure switch / chamber that other posts refer to? Where can I find it?
Finally, there are two air pressure sensors mounted at the top of the frame connected by pipes to the nether regions. One sensor is a large grey disc whilst the other is a small black cyliner. What do these do? Can they fail? Any help most appreciated!
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.
Zanussi FJS 1225 W will not reach fast spin and motor jerks
- The problem
- A Zanussi Jetsystem 1200, model FJS 1225 W, would not spin at full speed. On spin, the drum kicked briefly then only idled or chugged slowly while the drain pump continued to run. The drum turned freely by hand, and the fault remained with no load. The owner had already cleaned and blown through the hoses and only found a very small amount of debris.
- Likely cause
- The accepted reply said the fault was more likely to be in the timer, PCB board or motor, with badly worn carbon brushes given as a possible cause of the jerky motor behaviour. A pressure switch fault or blockage in the pressure bottle was considered less likely because that would normally allow washing and distribution but prevent fast spin only, which did not appear to match the reported symptoms. Water having got onto the electronics was also noted as a possible contributor.
- What fixed it
- No confirmed repair was documented. The accepted advice was that the symptoms did not point strongly to the pressure switch and were more consistent with an electronic control or motor-related fault, including possible worn brushes. Further diagnosis should be carried out by a suitably qualified appliance engineer.
- Checks to try
- Drum spins easily by hand
- Fault unchanged with no load
- Pipes were cleaned and blown through
- Processor relays were heard clicking regularly during spin
- Motor briefly jumped into life then slumped during each spin attempt
- Drain pump was running during the spin attempts
- Parts or tools mentioned
- timer
- PCB board
- motor
- carbon brushes
- pressure switches
Safety: Water had been on the electronics, so further diagnosis should be carried out by a suitably qualified appliance engineer.
2 Answers
Unfortunately this fault sounds like it could be the timer, the PCB board or even the motor. A pressure switch fault or blockage in the pressure bottle would cause the symptoms that it washes and distributes perfectly OK, but just wont do the fast spin. It doesn't sound like the case here. The jerkyness of the motor implicates one of the above causes. It's possible for badly worn carbon brushes to cause a jerky motor. If you had water on the electronics too, there's no guarantee it hasn't caused some problem. It doesn't look promising I'm afraid.
The "two air pressure sensors mounted at the top of the frame connected by pipes to the nether regions" must be the pressure switches.
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