Diagnostics And Service Information - GE Profile PB975 Technical Service Manual

Diagnostics and Service Information

ERC Failure Codes
The ERC (electronic range control) has error (F) codes that can be utilized by the service technician in order
to quickly identify failed or improper operation of certain oven components. The oven may stop operating
but not give an F code on the display immediately. A fault must exist continuously for 5 minutes before an F
code is recorded (F2, F8 are sooner). F codes are stored in nonvolatile EEPROM memory until the same fault
occurs twice consecutively.
To access failure codes, simultaneously press the upper oven Start and Timer/Clock pads. Upper oven sensor
codes appear on the left side and lower oven sensor codes appear on the right side of the display. To clear
codes, press upper oven Cook Time and upper oven Delay Start. To exit failure code mode, press upper oven
Start pad.
FAILURE MEANING
CODE
F0 Open OFF key
Supervisor jumper
(there are 2)
F2 Over temperature
Inside oven cavity as
measured by sensor
over 650°F unlatched or
915°F latched
F3 Open oven sensor (over
2950 ohms)
F4 Shorted oven sensor
(under 950 ohms)
F7 Shorted key
F8 EEPROM data shift failure
FF Loss of latch motor safety
circuit
CORRECTION
• Open wire or terminal within keypad harness
• Bad solder on crystal mounted keypad board.
• Welded relay contacts
• High resistance in oven sensor leads/connectors
(especially at sensor in rear)
• Disconnect power.
Disconnect sensor harness from control. Measure sensor
resistance (white leads) to be ~ 1080 ohms at
room temperature with 2 ohms per degree change.
• Look for damaged harness terminals if not bad sensor.
• Disconnect power.
Disconnect sensor harness from control. Measure sensor
resistance (white leads) to be ~1080 ohms at
room temperature with 2 ohms per degree change.
• Separate sensor from harness to determine fault.
Determine if problem is with Key Panel or Control by
disconnecting keypad cable and power up control. If no,
F7 code problem is with key circuit.
If repeated, replace control.
Replace control.
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