Component Testing; Humidity Sensor - KitchenAid KBMS1454R Technical Education

Before testing any of the components, perform
the following checks:
• The most common cause for control failure is
corrosion on connectors. Therefore, discon-
necting and reconnecting wires will be nec-
essary throughout test procedures.
• All tests/checks should be made with a VOM
or DVM having a sensitivity of 20,000 ohms-
per-volt DC, or greater.
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.

HUMIDITY SENSOR

Refer to page 4-5 for the procedure for access-
ing the humidity sensor.
1. Unplug microwave oven or disconnect
power.

COMPONENT TESTING

Electrical Shock Hazard
• Check all connections before replacing com-
ponents, looking for broken or loose wires,
failed terminals, or wires not pressed into
connectors far enough.
• Resistance checks must be made with power
cord unplugged from outlet, and with wiring
harness or connectors disconnected.
WARNING
2. Disconnect the 3-wire connector from the
HUM connector on the electronic control
board.
3. Set the ohmmeter to the R x 1K scale.
4. Touch the ohmmeter test leads to the
indicated wire terminals of the 3-wire con-
nector. The meter should indicate as fol-
lows:
Black to white = approximately 2800 Ω
@ 77°F/25°C ±18°F/10°C.
White to red = approximately 2800 Ω
@ 77°F/25°C ±18°F/10°C.
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