Freezer Overtemperature Thermostat - GEAppliances CFE28TSH Technical Service Manual

The defrost heater is a 420-watt, single-tube, glass-
enclosed radiant heater. It is located at the bottom
of the evaporator between the rows of coils. It is
held in place by two tabs on the evaporator (one on
each end plate), a ceramic and wire support, and a
right side wire support.
The defrost heater has an approximate resistance
value of 32 ohms.
1. Remove the freezer evaporator cover (see the
Freezer Evaporator Cover section).
• During defrost, the drain probe assists in
preventing the drain from icing closed. During
assembly, the probe must be installed on the
evaporator and inserted in the drain to prevent
drain freeze-up.
• The ceramic and wire support prevents the
heater from sagging and touching the metal
drain trough if the glass is broken.
• There is a drip shield located just above the
heater.
The following procedures can be made easier
by loosening the two Phillips-head screws (one on
each top corner of the evaporator) and tilting the
bottom of the evaporator out from the drain trough.
2. Remove the ceramic and wire support, right
side wire support, and the drain probe from the
evaporator.
Ceramic and Wire Support
Wire Support
Drain Probe
3. Bend the aluminum tabs back (located at each
end of the defrost heater) and lower the heater
from the evaporator.
4. Disconnect two lead wires and remove the
heater.
Tab
Heater Lead Wire
(1 of 2)
The freezer overtemperature thermostat is attached
to the evaporator suction line with a metal clip.
The overtemperature thermostat will open its
contacts and de-energize the heater whenever the
evaporator temperature reaches approximately
140°F. The thermostat contacts will close at
approximately 110°F.
To access the freezer overtemperature thermostat
the freezer evaporator cover must be removed (see
the Freezer Evaporator Cover section).
Overtemperature
– 74 –
Defrost Heater
Thermostat