© 2010 Viking Preferred Service
48
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power to unit using power
switch before servicing. Wires removed during disassembly must be replaced on proper terminals to insure
correct earth ground and polarization. After servicing, reconnect power using power switch.
Service Diagnostics and Procedures–Disassembly
Defrost Thermostat
The defrost thermostat is a bimetal switch that is
normally open. When the control goes into defrost
mode, the thermostat closes supplying power
to the defrost heater. Once the freezer section
reaches 35˚F, the terminator opens and power to
the heater is broken.
Defrost Thermostat access:
1.
Open freezer door and remove shelves, basket
and drawers,
(see freezer drawer, page 44).
2.
Remove basket supports, upper and lower
freezer rails
(see upper and lower freezer rail
sections, pages 44-45)
.
3.
Remove upper back panel
(see upper back
panel section, page 45).
4.
Remove freezer panel
(see freezer panel,
page 46)
.
5.
Remove evaporator fan
(see evaporator
section, page 46).
6.
Disconnect wiring and un-clip thermostat.
8. Repair or replace thermostat.
9. Reverse procedure to reinstall.
Defrost Thermostat
Wiring