Error Codes - GE JKS10 Technical Service Manual

Error Codes

The electronic oven 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. F codes are stored in nonvolatile EEPROM memory until the
same fault occurs twice consecutively. After that, the F code will be displayed. All F codes, except for F9, are
suppressed. F9 is the only error code that can be displayed for the consumer. A fault must exist continuously
for several minutes before an F code is stored (F2 and F8 are 1 minute or less).
On the JKS10, JKP30, JKP35, & JKP55, the F codes can be recalled by pressing the Timer, Clock, and Min
Down buttons simaltaneously. While F codes are displayed, pressing Min Up and Hr Down simaltaneously
will clear them.
On the JKP70, JKP75, PK916, PK956, ZEK938 & ZEK958, the F codes can be recalled by pressing the Timer,
Clock, and 9 buttons simaltaneously. While F codes are displayed, pressing 6 and 8 simaltaneously will clear
them.
ERROR
MEANING
CODE
F0 Shorted OFF key
F2 Oven temperature
inside oven cavity as
measured by sensor
over 650°F unlatched or
915°F latched.
F3 Open oven sensor
(over 2900 Ω)
F4 Shorted oven sensor
(under 950 Ω)
F5 Sensor circuit
supervisor failure
F7 Shorted matrix or START
key
F8 EEPROM data shift
failure
F9 Cooling fan stalls or
other cause of open
thermal switches in
yellow or blue leads
Determine if problem is with Key Panel or Control by disconnecting ribbon cable
and measuring fl at cable pins 3 to 4 on JKS10, JKP30, & JKP35; cable pins 7 to
12 on JKP55. Should be to probe side with conductor. Should be 125–175 ohms
while pressing OFF key.
For JKP70, JKP75, PK916, PK956, ZEK938, & ZEK958, perform glass touch board
key panel test, making sure to test EVERY pin combination for possible shorts. If
there are no shorts, the problem is probably with the Control.
Welded relay contacts on the relay board.
Cooling fan stalled or blocked.
Airfl ow to rear of unit.
High resistance in oven sensor leads and/or 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 a 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.
Replace Control.
For JKS10, JKP30, JKP35, & JKP55, determine if problem is with Key Panel or
Control by disconnecting fl at cable and measuring cable pins using pinout
chart. Allow up to 1000 ohms when pressing a key.
For JKP70, JKP75, PK916, PK956, ZEK938, & ZEK958, determine if problem is with
Key Panel or Control by disconnecting ribbon cable and power up control. If no
F code, problem is with key circuit.
If repeated, replace Control.
Suspect stalled cooling fan or airfl ow to control area
– 55 –
CAUSE / CORRECTION