Question about Zanussi Dishwashers

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I have a zanussi ZSF2440s dishwasher, runs a program ok but wont heat water or dry, heater and wiring all ok, have changed controller but fault still persists

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  • tim_scoones Aug 23, 2010

    Are there any Zanussi specialists who can help with this ?, the heater circuit is good but the controller won't turn the heater on, I have already replaced the controller and the fault still persists. The resistance of the thermister at 18 deg.C is 5.7k Ohm, is this correct ?

  • tim_scoones Aug 25, 2010

    Hi, thanks for your reply, yes it is similar to this, mine is a small stainless steel tube fitted in a branch of the circulation pump hose, two wires go to the controller and these check out ok.

    The NTC thermistor measures 5.7k Ohm at room temperature and if I warm it up the resistance starts to reduce as it should but I don't know if the resistance value is correct.



    There arn't any actual thermostats in the machine except overheat protectors on the heater itself and these test out ok.

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  • Zanussi Master
  • 3,247 Answers

Looks like the program detects the water is already heated. Have you checked the thermostat element?

Please post a comment so that I can help you further.

Posted on Aug 24, 2010

  • Sam Aug 24, 2010

    Can you please confirm if the thermistor you are mentioning looks like this.

  • Sam Aug 25, 2010

    I find it hard to understand why there would be no thermostat to control the heater temperature. Does the dishwasher not have wash cycles with different temperatures?



    Test the continuity between the thermistor connectors and the controller / timer terminals. Wonder if there is an open circuit somewhere which is giving false signal to the controller. I am not a zanussi expert so maybe I should not provide any more consultancy on this problem. You have already looked at the most obvious items.

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  • Zanussi Master
  • 19,396 Answers

Hi.

Test and eventually replace either thermostat or heater. They can be tested reading impedance at their contacts. If there is no continuity (circuit open) then the part must replaced. Start from the thermostat that fails quite often.

Posted on Aug 22, 2010

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6ya6ya
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Posted on Jan 02, 2017

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