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F4 No temperature increase has been sensed while the element is
turned on
Question Yes No
1 Does the element heat in
diagnostics?
Go to Question 7 Go to Question 2
2 Test the resistance of the
heater element using the
connection on the
controller, is it correct?
Go to Question 3 Go to Question 5
3 Is the connection on the
controller okay?
Go to Question 4 Replace or repair
connection
4 Electronic controller
failure?
Replace electronic
controller
Go to Question 1
5 Are the wiring and
connections from the
controller to the element
all okay?
Go to Question 6 Repair or replace
wiring harness or
wiring
connections
6 Is the resistance of the
heater element correct?
Go to Question 7 Replace heater
plate
7 Is the resistance of the
temperature sensor
correct?
Replace electronic
controller
Go to Question 8
8 Are the wiring and
connections down to the
temperature sensor okay?
Go to Question 9 Replace or repair
wiring harness or
wiring
connections
9 Heater element failure? Replace heater plate Go to Question 1
F9 Electronics failure (EEPROM access error)
Question Yes No
1 If the DishDrawer is
isolated from the power
supply for 10 seconds,
does the fault clear?
No fault found Go to Question 2
2 Electronic controller
failure?
Replace electronic
controller
Go to Question 1
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