Hotpoint dishwasher Mod 7821

[walnut]

Hello,
Customer reported dishwasher was sticking and making a funny sound.
I found a fault with the float mechanism, microswitch spring was to weak to push the float back after a fill so not enough water was entering the machine.
I replaced microswitch and checked the element – OK, thermostat next to the
element = S/C and there was a small screw in stat on the right hand side which was O/C.
Is the small stat a safety once only stat ? if so should it be S/C or O/C?
There is a marking on the stats case that says 180, is this the temp sat rating?
Thanks for any help.

[Penguin45]

Re: Hotpoint dishwasher Mod 7821

Screw-on stat is the temperature control stat, normally open. Timer is stopped for heat, stat making restarts timer. Stat by heater is overheat stat – normally closed.

HTH,
Chris.

[iadom]

Re: Hotpoint dishwasher Mod 7821

Depends on the date code, different stats fitted, basically the machine can have either two 85°C closed circuit stats or an single double pole 85°C normally closed stat to prevent overheating, and one 65°C normally open stat to control wash temperatures.
The safety stat is fitted in different positions dependant on the date code.

Grr, beaten to it by the feathered one. :wave:

[walnut]

Re: Hotpoint dishwasher Mod 7821

Thanks or the quick response.

[bobokines]

Re: Hotpoint dishwasher Mod 7821

walnut wrote:
Customer reported dishwasher was sticking and making a funny sound.

It’s not unusual for the timer motor gear to come loose from the timer motor shaft. The gear wheel should be flush with the end of the timer motor shaft. The recognised fix was to use loctite but I used to roughen up the shaft with side cutters and push the gear wheel back on.

Bob

[Author]

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