Hotpoint wt 761p F-03 Code

[Ahallis]

My Hotpoint wt 761p washing machine has developed a fault.
When turned on it starts to fill, then a few seconds later whilst still filling, also starts to empty.
I dont seem to be able to select a different program, as it always starts this fill/empty cycle whenever its turned on.

There is a F-03 fault displayed, which I think is a open/short Thermistor fault.

I have looked at the rear of the washer and removed the rear access cover.

the heating element id a bleckmann PF70, two wires to the element, + an earth connection, and a square plug which I think might be the Thermistor.

Ive checked with a meter and at room temp, (still in the machine with water) its reading 550 Ohms.

1. is this the Thermistor location.
2. if so, id the impedance reading correct.
3. Could I use a resistor, pot or rheostat (value please) that I could connect to the lead in place of and to impersonate the (Thermistor) to help trace the fault.

 

[Leccy758]

Generally with a thermister you check the resisitance it is usually quite high (in the region of 15k to 30k at room temp)

Then depending whether its a NTC or PTC the resisitance should raise or lower when heated.

To test we usually heat the thermister up by holding on hand or with a gentle heating with hair dryer or hot water, if the resisitance changes then it is usually ok.

Low readings are suspect though on one as are open circuit

 

[Ahallis]

With Heater removed from machine it reads 553 Ohms at room temp. No change when touching it with hands.

Removed Thermistor from element. After adding boiling water and leaving for a few mins, it read 519 Ohms.
Placed in Freezer at <0 deg C, now reading 640 Ohms


I visited a few shops today, all of them said it was probably the main board, that the heater 'Thermostat' was not going to be the problem, and that I'd need a service engineer to reprogram it all.

I cant trace what the Thermistor range should be, so shall buy a new complete Heater element and risk the £15.