Defrost Thermostat; To Test The Defrost Thermostat; To Remove The Defrost Thermostat; Defrost Heater - Electrolux E23CS75DSS0 Service Manual

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Section C - Electrical Components

Defrost Thermostat

The defrost thermostat is a temperature sensing
device. Wired in series with the defrost timer and
the evaporator defrost heater, it senses the rise in
evaporator temperature during a defrost cycle and
cycles the defrost heater off after all frost is melted.
It is calibrated to permit a defrost cycle only when
the temperature is below a preset temperature. The
contacts in the defrost thermostat are set to open
at 47°F and close at 25°F.

To Test The Defrost Thermostat

1. Measure resistance across two thermostat
leads at connector plug. At room
temperature, resistance should be infinity.
Contacts are open.
2. Place a couple ice cubes on sides of
thermostat. After a few seconds, thermostat
should reset.
3. Measure resistance again.This time, reading
should be 0. Contacts have closed.
4. If resistence readings is not "0", replace
defrost thermostat. Contacts are probably
burnt.

To Remove The Defrost Thermostat

1. Disconnect refrigerator from electrical supply.
2. Remove freezer section bottom shelves and
baskets.
3. Remove ice container and rail assembly. The
multiconnector at back of rail assembly must
be disconnected before rail assembly will
come free.
4. Loosen 2 screws holding ice maker to right
side of compartment, just enough to lift ice
maker free. The multiconnector must be
disconnected before ice maker will come free
from compartment.
5. Remove two rail assembly supports. (two
screws on each one).
6. Remove four screws from evaporator cover.
7. Remove five screws on evaporator air duct
cover.
8. Cut the two leads coming from thermost
close to the base. You must leave enough
wire coming from connector to allow for
splicing tin new thermostat.
9. Remove faulty thermostat.
NOTE
The Defrost Thermostat Replacement Kit comes
with a new thermostat, 2 solderless connectors
and two pieces of heat shrink to allow for splicing
the new thermostat to the connector plug.
10. Crimp two solderless connectors to the two
leads on the new thermostat.
11. Slip two pieces of heat shrink onto the two
leads coming from the connector plug.
12. Crimp two solderless connectors to the two
leads coming from the connector plug.
13. Slip heat shrink over the solderless
connectors and heat that area with a heat
gun until the heat shrink is tight around the
solderless connectors.
14. Hook thermostat back on the evaporator near
or at the same place it was before.
15. Reverse Steps 1 - 7 to complete repairs.
Figure C7

Defrost Heater

The defrost heater is a radiant "U" shaped
resistance heater, rated at 450 watts. The defrost
heater is energized during that period of the cycle
when the defrost thermostat contacts are closed.
The length of time the heater is energized depends
on the amount of frost accumulation on the
evaporator.
How To Remove The Defrost Heater
1. Disconnect refrigerator from electrical supply.
2. Remove freezer section bottom shelves and
baskets.
Defrost
Thermostat