KitchenAid KBFC42FS - Testing Defrost Heater, Bimetal, and Water Valve

5-7
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
WARNING
DEFROST HEATER & BIMETAL
Refer to page 4-27 for the procedures for ac-
cessing the defrost heater & bimetal.
1.
Run the diagnostics tests (see page 6-2)
and check for the proper operation of the
defrost heater and bimetal in step 07.
NOTE: If the bimetal is closed, the voltage at
the
defrost heater terminals will be 120 volts
AC. The remaining steps will allow you to
check the resistance of the defrost heater and
bimetal.
2.
Unplug refrigerator or disconnect power.
3. Disconnect one of the wires going to the
defrost heater.
4. Set the ohmmeter to the R x 1 scale.
5. Touch the ohmmeter test leads to the de-
frost
heater terminals. The meter should
indicate approximately 15 to 25 Ω.
6.
Touch the ohmmeter test leads to the de-
frost bimetal wire connectors. The meter
should indicate as follows:
With
the bimetal below 20°F, the meter
should indicate continuity (0 Ω).
With
the bimetal above 46°F (8.9°C),
the
meter should indicate an open cir-
cuit
(infinite). The bimetal will close @
34°F (1.1°C).
•
•
WATER VALVE
Refer to page 4-30 for the procedure for ac-
cessing the water valve.
1.
Unplug refrigerator or disconnect power.
2. Disconnect the wire connectors from the
water valve solenoid terminals.
3.
Set the ohmmeter to the R x 1 scale.
4. Touch the ohmmeter test leads to the so-
lenoid terminals. The meter should indi-
cate approximately 180 to 190 Ω.
Defrost Heater
Bimetal