48
Dometic
®
MANUAL
Refrigerators
P2
THERMISTOR
ADJUSTER
TO THERMISTOR
NOTE: Dometic refrigerators do not come equipped with a
thermistor adjuster. This is an add-on component.
THERMISTOR
ADJUSTER
TO THERMISTOR
P1
P2
P3
Thermistor
unplugged
from P C
Board
NOTE: It will take a very precise ohm meter to accu-
rately read this measurement. If a precise ohm meter is
not available, a continuity reading will indicate an open
or complete circuit. If an open circuit is the test result,
replace the element.
9D. THERMISTOR
To determine if the temperature sensor is functioning
properly, perform the following test.
Remove the cover from lower circuit board. Disconnect
the thermistor harness from the P2, 2-pin terminal on
the lower circuit board. Place the thermistor in a glass of
ice water. Wait 2 to 3 minutes. Using an ohm meter,
place a probe on each terminal point. You should get a
reading of approximately 7,000 to 10,000 ohms. Normal
failure for this type of device is to have a very high
resistance. A defective thermistor could cause an
overcooling condition on all modes.
10D. THERMISTOR ADJUSTER
The thermistor adjuster is a resistor-type component
that attaches between the thermistor and the lower
board. Its function is to allow the refrigerator to reach
temperatures below the normal 46° to 35°F. range
(setting 1 through 5 on upper circuit board).
To determine if the thermistor adjuster is operating
properly, do an ohms resistance check across the
terminals. Proper ohms reading is approximately 23,200.
11D. DC VOLTAGE REQUIREMENTS
For the refrigerator to operate on any mode, DC voltage
must be supplied to the terminals at the rear of the
refrigerator.
Clean Direct Current (DC) power is mandatory for high-
tech circuits to operate as designed. The sources for DC
power are a battery and a converter.
A battery will provide straight line DC power, but ex-
tended operation will require recharging of the battery by
the converter or the alternator.
To Next Page
Loading...
Need help?
General
