Orifice; Thermal Fuse - Dometic DM2652 Service Manual

Diagnostic Procedures
Component
22
Diagnostic Question
Is E4 displayed? (New Generation
models only)
Is the right temperature setting light
blinking? (First generation DMR702 and
DMR702-D models only)
Does the refrigerator operate in electric
mode but not in gas mode?
Is the check indicator lamp on?
(Americana models only)
Is E3 displayed? (New Generation
models only)
Are two thermostat range setting lights
flashing? (First generation DMR702 and
DMR702-D models only)
Relay (RM1350 Model Only)
Is the refrigerator or freezer not cold
enough in any operating mode?
Does the ice maker not produce ice?

Thermal Fuse

Is the refrigerator not operating and the
interior light not on?
Is E3 displayed? (New Generation
models only)
Are two thermostat range setting lights
flashing? (First generation DMR702 and
DMR702-D models only)
Americana and New Generation Refrigerators
Action Based On Status
1. Confirm that the voltage supplied to the
lower control module at terminal 6 is
between 10.5–18 VDC.
2. If the voltage is out of specification,
perform a diagnosis on the power supply.
If the error persists, replace the lower control
module.

Orifice

1. Check the part number and size of
the orifice against the parts list for the
refrigerator model.
2. If the number does not match, replace the
orifice with the correct part.
1. Remove the orifice.
2. Hold the orifice up to a light. You should
be able to see through the orifice and it
should appear pink in color.
Do not blow compressed air or stick
I
anything into the orifice. The orifice has
a man-made ruby inset that is easy to
dislodge. If dislodged, the orifice must
be replaced.
3. If the orifice is clogged, soak it in an
alcohol-based solvent for one hour.
4. Remove it from the cleaner and let it air
dry.
5. If the orifice is still clogged, replace it.
1. Confirm that the voltage from the lower
control module to terminal 86 is between
10.5–18 VDC.
2. If the voltage is out of specification,
perform a diagnosis on the power supply.
1. Test for continuity between terminal 30
and terminal 87.
2. Test terminal 85 to confirm that there is no
continuity to the chassis ground.
3. If the relay fails either test, replace it.
1. Test for continuity through the thermal
fuse.
2. If there is no continuity, replace the
thermal fuse.
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EN