Convection Heater Assembly And Thermistor; Upper Heater Assembly - GE JK3800DH1BB Technical Service Manual

Convection Heater Assembly and Thermistor

The oven must be removed from the cabinet or wall
opening to access the convection heater assembly.
(See the Removing Upper Oven section in this
guide.)
The convection heater assembly is composed of an
inner and outer fan blade, motor, heating element,
and thermistor.
Remove the rear cover. Three Phillips head screws
hold the cover in place.
Thermistor
The thermistor must be removed before removing
the convection heater assembly. The thermistor is
attached to the convection heater assembly by a
single Phillips head screw.
The thermistor is connected to the power board
at location CN8. The approximate values at room
temperature are:
• Red - Blue = 400k
• Red - White = 290k
• Blue - White = 110k
Convection Heater Assembly Shown with Rear
Cover Removed

Upper Heater Assembly

The halogen heater has an approximate resistance
white wire harness.
The ceramic heater has an approximate resistance
yellow wire harness.
Upper Heater Assembly Removal
CAUTION: Mark each of the wire harnesses before
disconnecting. If the connectors are interchanged,
1. Remove the oven and remove the outer cover.
(See the Removing Upper Oven section in this
guide.)
2. Disconnect the heater assembly wire harnesses
and pull them through the wire guide.
3. Disconnect wires from the upper heater TCO.
4. Remove the two Phillips head screws, wire
retainer, and the heater shield from the heater
assembly.
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