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NewThermostat is not helping

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Dishwasher Repair

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Hi All, I have run into the standard symptom where the wash cycle will not advance when the heater is

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Old 08-14-2012, 10:43 AM
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Default NewThermostat is not helping
Model Number: fdb750rcs0   Brand: Frigidaire   Age: 5 - 10 years   

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Hi All, I have run into the standard symptom where the wash cycle will not advance when the heater is set to "on" and water is cold. I ended up changing the thermostat (********************.ca part# PS420304) and it still did not work. I then changed the heating element with no success. (i.e. cycle still stuck and water still cold) Is there any way to test the thermostat to see if it is working ? Any advise on what else I need to check ?

I am a newbie....

Thanks a million,

Gardy


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  #2 (permalink)  
Old 08-14-2012, 05:53 PM
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Hi Gardy,

There are two more thermostats: the temperature boost thermostat and the temperature assure thermostat. They both are attached to the tub behind the electrical junction box under the dishwasher. They both can be tested for continuity. When reinstalling these thermostats, apply thermal mastic to the face of the thermostat.

- The temperature boost thermostat Part number: 154227808

Part number: 154227808



- The temperature assure thermostat Part number: 154227805

Part number: 154227805



- The thermal mastic Part number: 5303307896

Part number: 5303307896

Here are the breakdown diagrams and Replacement parts for Frigidaire FDB750RCS0 Frigidaire/dishwasher | AppliancePartsPros.com

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Old 08-14-2012, 10:45 PM
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Interesting...I was not aware of the need for thermal mastic..makes sense though. However, it would be weird that all of them fail. Ok I will test and see...

Thanks again,

Gardy
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Old 08-15-2012, 03:20 PM
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Quote:
Originally Posted by glavertu View Post
...it would be weird that all of them fail...
Gardy,

Did you test the thermostat you already replaced? Or you were just guessing?

Gene.
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Old 08-16-2012, 01:34 PM
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Actually I did not test the thermostat... I made a educated guess, since the connectors to the thermostat were burned to a crisp., had to cut the cable and replace those connectors before replacing the thermostat. How do I test the thermostats ?

Thanks,

Newbie Gardy
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Old 08-16-2012, 02:25 PM
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All such parts can be tested for continuity, using a simple multimeter. You can find more information in one of our sticky threads: How To Check Dishwasher Parts For Continuity

Gene.
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Old 08-16-2012, 03:54 PM
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Thanks Gene...looks like a need a multimeter....(or I can give up and get a new diswasher...:-)

Thanks again,

Gardy
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