Thermister

John for Model Number lgbd2431lf

Answer John, The Thermistor will remain open until it reaches a certain temp. Once temp has been met the thermistor will close to complete circuit. 

Dave for Model Number FDB1500LFQ2

Answer Hello Dave, The thermistor can indeed prevent the unit from going through its' cycles. If the control doesn't see the thermistor satisfied, the control cannot advance. Be aware though, if the heating circuit has failed and the water cannot heat, the thermistor cannot be satisfied and the unit will not advance. Also, if the control circuit that receives the information sent by the thermistor fails, it also will not advance. 

Allrightea for Model Number Frigidaire Dishwasher FDB1050REC0

Answer Hello allrightea. The thermistor 154227501 is only used on certain models. If the heater and thermostat are good, you will need to replace the control board 154712101 for the heating issue. 

Steve for Model Number fgbd2431ko

Answer Hi Steve. There is a supplied tech sheet in the unit by the control board or behind the toe kick plate. Use it to put the unit in a field service test mode. It will individually test the components. Then it will show a fault code for the effected circuit. The thermistor does sense the sump water temperature. Part # 154227501. Connector P5 sends the board voltage to the Hi- limit thermostat. It will read closed. To then pass on the voltage to the heater which ohms out to 9.28 ohms. Part # 154825001. Make sure all connectors are all clean and tight. Connector p3-2 at the board will send voltage to the blower system that ohms to 214 ohms (if supplied in your unit). Thank You. 

Guest

Answer Hello. Check the thermostat 154290204 on the bottom of the tub to see if it is open. It should read closed or 0 for continuity. Hope this helps. 

Guest

Answer Hello. If the dishwasher is pumping out ok, except for the second cycle, you will need to replace the control board. 154470602 Hope this helps.