[pau1200]

Re: Hotpoint WD640P F-08 Error

just to update this thread, the fault was due to the heater element, when insulation tested a short was found to earth which caused the voltage detect circuit on the main pcb to think it was on when it wasnt. The joys of using a potential divider.

Thanks for your help helo_75, much appreciated. Hope i can return the help some time.

[pau1200]

Re: Hotpoint WD640P F-08 Error

Please dont think i am questioning your knowledge, i am not in any trying to that. What i am trying to do is understand what is going on with my washing machine, you have now given me a little more to go on as in the heater circuit is on when the tub is empty. I know the the heater circuit isnt on but obviously the feedback signal is stuck in a state, so i should be able to recreate the fault with the heater disconnected. It will probally be some sort of transistor/fet which is hard on.
As engineers do you diagnose the pcbs to component level and do you have any schematics for them as this would be really usefull.

Thanks

[pau1200]

Re: Hotpoint WD640P F-08 Error

Thanks for the update, I checked the heater circuit out and it works fine, on a wash cycle it switches on and off correctly. I am wondering if there is something wrong with the pressure switch, as it only fails before it starts to spin, machine operates correctly for everything else.
I also get the f08 error when the machine powers up, if i do not start a cycle within 30 seconds i get f08 error message. The reason i suspect the pressure switch is if i unplug the pressure switch i do not get the f08 error message on power up. I have physically checked the pressure switch by measuring continuity between the 3 terminals under pressure and without pressure and it seems to switch o.k. This leaves me with where the pressure tube comes from.
Is the pressure tube easy to get too to check?

[pau1200]

Re: hotpoint wd640 problem

o.k i have fixed the main problem, there was a loose spade connector on the heater element, washing machine now working o.k again.

I have also checked the heater element on the heater box and it is o.k. I did put the machine on dry and checked the voltage accross the element and it doesnt read any voltage. if i check the voltage on the thermostat (its the one that feeds the element) there is 240v but nothing on its output pin to the element coil. does anyone have the part number for this, this is the dryer issue

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