GE JKP20 Technical Service Guide

– 28 –
Model JT952
FAILURE
CODE MEANING CORRECTION
Determine if problem is with Key Panel or Control by
disconnecting ribbon cable and measuring flat cable pins
13–14. Should be open. Should be 100–150 ohms while
pressing OFF key.
-F2
-
1.Inside oven cavity as measured by
sensor over 650°F unlatched or 915°F
latched, or
2.Cooling fan stalls while oven above
650°F—open thermal switch in yellow
leads
• Welded relay contacts
• Cooling fan stalled or blocked
• Airflow to rear of unit
• High resistance in oven sensor leads/
connectors (especially at sensor in rear)
Shorted OFF key
-F0-
Over temperature
-F3-
• 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 damage harness terminials if not a bad sensor.
Open oven sensor
(over 2900 ohms)
Shorted oven
sensor (under 950
ohms)
-F4-
• 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.
Shorted matrix or
START key
-F7-
Determine if problem is with Key Panel or Control by
disconnecting ribbon cable and measuring flat cable using
pinout chart. Allow up to 1000 ohms when pressing a key.
-F8-
EEPROM data shift failure
If repeated, replace control.
-F9-
Cooling fan stalls while oven above
650°F—open thermal switch in
yellow leads
Cooling fan or airflow to control area.
-FF-
Loss of latch motor safety circuit
Replace control.
OFF key.
<300 Ω while pressing
or open short.
yellow or blue leads.
5 - 14.
Models JT965 and JTP86
FAILURE
CODE MEANING CORRECTION
Determine if problem is with Key Panel or Control by
disconnecting ribbon cable and measuring flat cable pins
13–14. Should be open. Should be 100–150 ohms while
pressing OFF key.
-F2
-
1.Inside oven cavity as measured by
sensor over 650°F unlatched or 915°F
latched, or
2.Cooling fan stalls while oven above
650°F—open thermal switch in yellow
leads
• Welded relay contacts
• Cooling fan stalled or blocked
• Airflow to rear of unit
• High resistance in oven sensor leads/
connectors (especially at sensor in rear)
Shorted OFF key
-F0-
Over temperature
-F3-
• 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 damage harness terminials if not a bad sensor.
Open oven sensor
(over 2900 ohms)
Shorted oven
sensor (under 950
ohms)
-F4-
• 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.
Shorted matrix or
START key
-F7-
Determine if problem is with Key Panel or Control by
disconnecting ribbon cable and measuring flat cable using
pinout chart. Allow up to 1000 ohms when pressing a key.
-F8-
EEPROM data shift failure
If repeated, replace control.
-F9-
Cooling fan stalls while oven above
650°F—open thermal switch in
yellow leads
Cooling fan or airflow to control area.
-FF-
Loss of latch motor safety circuit
Replace control.
OFF key.
<300 Ω while pressing
or open short.
yellow or blue leads.
13-14.

GE JKP20 Specifications

General

Brand	GE
Model	JKP20
Category	Oven
Language	English