Indesit washer control board question
Hi, sorry for the long backstory, thought it would be best to add the full information.
I have an Indesit xwd71452 xkuk
My other half recently overfilled our washer and a sock managed to somehow bypass the drum seal and wedge itself between the drum and the water inlet pipe.
Chaos ensued as the water backed up rapidly and started to pour out of the powder drawer.
Once i had removed the offending item and started a new wash a h20 error occured about a minute into the cycle.
The pre-wash was filling correctly but no water was entering for the main wash, apart comes the machine again and on checking the inlet valve solenoid was showing an open circuit.
I have now replaced this but the washer isnt sending a signal to the new valve to open. Ive taken apart the main control board housing and it appears that the triac for the fill valve signal wire is blown. All other components seem to be functioning as intended.
Indesit say its not possible to repair the board and it would need to be reprogrammed, my question is do you expect that will be the case or will a replacement triac sort the job as its no where near the micro chips themselves.
Any help or guidance would be 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.
Indesit XWD71452 XKUK H20 error traced to failed fill-valve triac on control board
- The problem
- After a sock became trapped and water backed up through the powder drawer, the Indesit XWD71452 XKUK then showed an H20 error about a minute into a cycle. Pre-wash filled correctly, but no water entered for the main wash.
- Likely cause
- The inlet valve solenoid for the main wash was found open circuit and was replaced, but the machine still did not send a signal to that valve. The original poster then traced the fault to a failed triac on the main control board that drives the fill valve. It was suggested the earlier incident may have contributed if water reached electrical parts, but that was not confirmed.
- What fixed it
- The confirmed repair was replacement of the failed control-board triac with a Z0107NA. The original poster reported that after fitting the new triac, the washer worked normally and all programmes tested correctly. No board reprogramming was needed in this case.
- Checks to try
- H20 fault appeared about a minute into the cycle
- Pre-wash fill operated correctly
- Main wash was not taking in water
- Inlet valve solenoid checked open circuit
- Valve wiring traced back to the control board
- Triac tested with a multimeter diode-check function and identified as faulty
- Machine tested on each cycle after repair
- Parts or tools mentioned
- inlet valve solenoid
- control-board triac Z0107NA
- multimeter
- soldering equipment
Safety: Board-level repair was only reported as successful by a user experienced in soldering electronics. Further diagnosis should be carried out by a suitably qualified appliance engineer.
5 Answers
Hello there. It seems very strange that the fault would occur after the sock incident, unless water somehow leaked out onto electrical parts. Washing machine repair engineers don't repair pcbs. Manufacturers have never facilitated repairing them. So I have no idea about the components inside pcbs other than general knowledge about resistors etc. The only repairs I've ever done to them are soldiering dry joints.
Need Professional Help or Spare Parts?
Hi Andy and thanks for the response.
I traced the cables back to the circuit board from the valves and worked my way back from there.
They are controlled by a bank of Triac's and MOV's triggered from the main microcontroller.
One of the triacs had gone bad, i isolated this just using a basic diode check function on a multimeter which indicated that there was no voltage drop across the component.
Replaced with a new triac (Z0107NA if anyone is interested) and all is well again!
Its not something i would recommend unless you have experience with soldering electronics as these components are heat sensitive and easily damaged whilst fitting.
Ive tested on each cycle now and none of the programming seems to have been affected either.
Thanks for the quick response anyway and have a nice day!
Many thanks for the update. Well played.
Need Professional Help or Spare Parts?
Hi there !
I have a similar issue, but I think with a different component, i.e. :
Do you by any chance know if this triac is also a Z0107NA ?
Unfortunately the label can't be seen on my board...
Thank you in advance.
Hi Boris ,
I was interested in your question , as i have the same issue with a blown transistor in the same place on my PCB. The code etched on this PCB alongside the transistor looks like Q018 , and your one appears the same.
Of course , the code on the transistor itself, (having blown ), is unreadable .
The door lock mechanism is haywire on this machine.
Did you ever find out the answer to your question about the triac ?
Did you solve the issue?
Thanks in advance
Paul
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