Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

[Hitcher1970]

Hello

Our Hotpoint WMD960 washing machine (about 4 years old) has developed a fault and displays error code F10 when the rinse cycle is about to commence.

So far, I have cleaned the pump and filter, checked the wiring connections to the pressure switch, pump and control PCB and I have also confirmed that the hoses to and from the machine are clear and not kinked.

I have also confirmed the small hose from the base of the machine to the pressure switch is clear (although I have not yet checked whether there are any small holes or splits but I think this is unlikely).

The machine is pumping out water without problem and before refitting the pump, I measured a reading of 172 Ohms between the wiring terminals.

I suspect the pressure switch may be at fault although it is in good condition and does make an audible click when blown into. I would like to prove the switch operation (or otherwise) before I replace it but I am struggling to find information on which terminals need to be monitored for the ‘on’ and ‘off’ states. It’s a Metalflex switch, part number HD505 T85 Mu and the terminals fitted are identified as 12, 14, 11 and 16.

If you could advise on anything else I should be doing to fix the machine and in particular, how to prove the switch operation, I’d be very grateful.

Thanks.

Neil

[iadom]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

11 to 12 is empty, 11 to 14 is full. The other connection is the overflow contact, you should not blow hard enough to trip this, it will not click and you can damage the switch if you do.

BTW, that is not the part number, there are three versions of this machine with three different pressure switches.

You will need to give us all of the numbers on the rating plate including any suffix to WMD960 that you can find.

There should be a label on the back as well if the one on the door is not clear.

[Hitcher1970]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

iadom

Thank you for the prompt reply and advice about the switch.

As requested, here are the details of our machine in full:

Hotpoint Ultima WMD960P
905120207 (Presumably the serial number)
Also noted: 54728 (Lot / week number?)

Further markings stamped on the circumference of the pressure switch for your reference:

505GU201
145-120-307
160022665.00

Regarding your advice about the terminals / contacts on the pressure switch, here are my findings, further to carrying out some measurements:

11 to 12 is S/C when switch ‘at rest’ (i.e. no air pressure)
11 to 14 is O/C as per above
12 to 14 is O/C as per above
11, 12 or 14 to 16 is O/C as per above

When pressure is applied to the tube on the switch, the states are as follows:

11 to 12 is O/C
11 to 14 is S/C
12 to 14 is O/C
11, 12, or 14 to 16 is O/C

Therefore, it looks like 11, 12 and 14 are operating together as a standard SPCO switch but based on your comments about the Overflow terminal – which is presumably the one marked ’16’ – the operation of the switch seems to have no effect on its state when referred to the other terminals so it safe to assume that overall, the switch is currently serviceable?

In any case, any advice on how to proceed with the repair will be appreciated.

Thanks and regards

Neil

[iadom]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

54728 is the commercial code and is the essential number for parts etc.
The switch for your appliance is C00261746.

From your tests it ‘appears’ to be OK but as you may be aware we are talking Indesit machines here. All circuits and connections between the main pcb and pressure switch should be checked. The choice is yours TBH, risk a low cost pressure switch to find out that the known flaky Indesit pcb is the cause of the fault after all. 🙁

Sent from my iPad using Tapatalk HD

[Hitcher1970]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

iadom

Thanks for the update and advice.

I was wondering if the PCB was going to be suggested as a possible cause of the fault.

I have just ordered a cheap but working pressure switch as per your part number advice and if that fails then I’ll have to extract the PCB and see if I can work out whether there has been a component failure or otherwise.

Will keep you posted and thanks again for the help.

Regards

Neil

[world9563]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

hi hitcher

just quick one did you find out if pressure witch or pcb as i have just got one in with same error code etc.

kind regards
mitch

[Hitcher1970]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

Hi Mitch

Thanks for the enquiry.

As per the discussion above, I installed the replacement pressure switch to test the machine but as anticipated, this did not solve the problem.

I carried out a detailed check of the pipe which connects from the pressure chamber to the switch and this was clear.

I also checked the continuity of the wiring from both the pump and the pressure switch to the PCB unit which sits in the recess at the bottom left of my machine (as viewed from the rear of it) and this checked out fine, as did the condition of all the connectors onto the board.

Since then I have extracted the PCB unit from the machine (a bit of a fiddle but much easier if you can ease off the white plastic cowling first) and in the next couple of days, Im going to remove and test the two power relays local to the pump wiring connector to see if they’ve failed.

Hope that’s of some help.

Regards

Neil

[world9563]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

hi neil

thanks for that neil if you could let me know how you get on please as i have the same problem as you and dont know weather to fix or just strip for the parts.

mitch

[Hitcher1970]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

Hi Mitch

Yes, I’ll keep you posted on any developments.

Best Regards

Neil

[omhie]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

Hi Read the comments about F10 fault. This shows on my machine but I think it is not to do with to the pressure switch. The machine will fill, the pump will empty. The machine will go thro the balance cycle will start a wash sequence but starting a spin cycle gives The F10. Does not spin at high speed at all when set to spin only F10 again. Could this be the motor? or me thinks the motor controller (main board). Any feed back would be appreciated Omhie

[iadom]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

The main board is not the motor controller, it controls ALL of the machines functions. F10 is pressure switch related but as has been mentioned above, the electronics on these Indesit based machines are some of the least reliable on the market and do suffer from all kinds of faults that are not always related to the fault code displayed.
The pressure switches are known to fail and the wiring connections do break down regularly.
Also earth leaks on the motor or heater can give spurious error codes.

Sent from my iPad using Tapatalk HD

[Legin76]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

Hi… I’m having a similar issue.

My WMD960 initially gave an F12 error. I took off the lid and checked the pressure switch which appeared to be ok so I blew into the pipe which I think was a little blocked. After blowing hard it cleared. When I tested it, it pumped out clumps sediment in the water.. I assumed this has been blocking it.

It worked fine for a week or so then I started getting an F10 error. This time it starts pumping in water but never stops until it realises it’s clearly got to much and pumps it all out with the F10 error. I thought I may have damaged the pressure switch so I ordered a replacement but it made no difference. I didn’t think it was the pressure switch tube. But as time is of essence I called an engineer out who tested the tube and checked the pressure switches.. When the engineer blew into both the new and old pressure switches there was only one click. He initially thought there should be two clicks but as the new one also only gave one assumed it was correct. He thinks it may be the PCB but I wanted to check that the new pressure switch was not faulty before I order a new one. Should there be one click or two on the pressure switch?

[iadom]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

You would need to give us the full serial number and commercial code from the rating plate, there are sealed and welded drums used on these machines.

If it is the sealed drum type then blowing down the pipe is unlikely to clear any blockage permanently.

I wonder about this ‘engineer’ you had out to the machine. Most modern ( last ten years or more) pressure switches will only give one click or even no clicks and TBH blowing into the switch trying to get a second click is likely to damage the switch as well.

NB. F12 is a communications error often caused by loose connections between the two modules.

[Legin76]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

I believe the serial number is WMD960G 8110550069 it also had L2(54720).

I gave hotpoint a call and they told me that F10 was electronics error and not the pressure switch. They offered to fix it for £129.99. If it is the PCB then I can get a second hand one for £30 on ebay. Now the hotpoint “sales person” was adamant that if I got one from elsewhere, even one from the same model that it would not work as it would need programming to work with my machine. Is this the case or should it just swap over?

[iadom]

Re: Hotpoint WMD960 Error Code F10 – Pressure Switch Advice

99{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} likely to need programming.

[Author]

Posts