Hotpoint WMA34 spin problem

[admin]

Machine will start to spin, then stop after a few seconds. Brushes look shiny and not overly worn – should I replace them anyway? Could there be a problem with unbalanced load detection?

[Dave_Conway]

Re: Hotpoint WMA34 spin problem

Possibly, check if it spins empty.

I suspect the motor personally 🙁

Power off before running any further checks of course 😉

Dave.

[admin]

Re: Hotpoint WMA34 spin problem

Thanks for reply Dave. Behaves exactly the same when empty, spins up for a few seconds, then stops.

Time to dig out the hotpoint service number I guess!!

[Dave_Conway]

Re: Hotpoint WMA34 spin problem

sda wrote:Time to dig out the hotpoint service number I guess!!

Repairs@ <<< over there should provide someone 😀

Dave.

[bazza500]

Re: Hotpoint WMA34 spin problem

I`ve came across this a few times. It is caused by the module not receiving feedback from the motor tacho and then the machine aborting.
Unfortunately it can be caused by either motor or module and can only be found with a meter but the other thing to check is that the motor wires sometimes chaffe against the bottom weight or the drum where they are tiewrapped. You can tell this easily by tilting the machine back and looking underneath. May save you a call out.

P.S Power off first obviously.

[twobeercans]

Re: Hotpoint WMA34 spin problem

I know this is an old thread, to be honest i just had this problem with my wma33.

i stripped out the control pcb, and did a piece by piece test, i normally work on laptop motherboards so it was not very difficult. Ennoyingly i could find no fault save a suspect thyristor BTA16 800W which i changed.

It didn’t help at all, i proceeded to disasemble the motor and quiet by accident i noticed a daft rataining clip securing the magnet that feeds the tacho coil was not secure. allowing the motor shaft to spin while the magnet was slipping. (what a ridiculous mechanism for goodness sake)
Anyway a dap of silicon on the shaft prior to refitting the magnet and presto no slipping even if the clip comes loose again.

Under normal circumstances i wouldn’t even bother but i fitted new outer and inner drums bearings ect 8 months ago and wasn’t about to waste al that effort lol.

hope this helps others, oh i measured the tacho coil at about 200ohms which can of course be measured from the control pcb. terminal with all white and 1 red wire. count red as 1, terminal to test are 4-5 if this is open it would mean a wiring fault as mentioned in this thread if not check the magnet retaining clip and then the thyristors on the main pcb they can be replaced without much problem with BTA16 600B which are 600v but stil 16amp and plenty upto the job.

regards tbc

[iadom]

Re: Hotpoint WMA34 spin problem

Three different types of motors used on these machines, CESET, FHP & Bosch. The loose tacho fault is well known but mainly only affects one of the three types.

Jim.

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