Dometic RM1350 - Door Position; Ambient Temperature; Cooling Unit; Food Storage

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9.5 Door Position
If the upper or lower doors are closing too high or low
against the frame, cold air leakage can occur. Adding or
deleting a at thin washer on top of the lower or middle
hinge pin can raise or lower the door position. To correct
the door alignment, loosen the hinge screws slightly and
reorient the door in the proper position. Hold the door in
its new position and carefully retighten the hinge screws.
9.6 Ambient Temperature
This is the temperature surrounding the recreational ve-
hicle, as well as the temperature of air at the back of the
refrigerator. As the ambient temperature increases, the
air temperature in the area of the cooling unit increases.
Improper venting at this point will cause the cooling unit
to have reduced efciency. A refrigerator that chases the
outside temperature is improperly vented or has a weak
cooling unit.
Note: To form a proper seal, it is important not to
leave any gaps.
9.7 Cooling Unit
The cooling unit is a self-contained, hermetically sealed
set of coils where the refrigeration process takes place.
The chemicals involved in the cooling process include
hydrogen, ammonia, water and a rust inhibiting agent.
There are no repairs recommended on the cooling unit.
If it is defective, replace with a new cooling unit. To check
the cooling unit, rst verify the AC heating elements are
good, proper ohms at room temperature, proper venting
and unit is level. If the RM1350 has water thru the door the
bladder must be drained before the cooling unit is tested.
Then place approximately one gallon of water inside the
refrigerator in a few containers and place a thermometer
in one of the containers of water. Next, unplug the original
thermistor from the lower control board, and plug up a
new thermistor and let it hang outside the lower vent.
This will cause the cooling unit to run constant. Turn unit
onto AC and make sure the fans are running. Operate
for at least 12 hours and check the temperature on the
thermometer in the container of water. It should be at 43
degrees or lower depending on test conditions. If so, the
cooling unit is good. If the temperature of the water is
above 43 degrees, replace the cooling unit. The outside
temperature will affect the cooling capacity of the unit.
There is that rare occasion when the cooling unit will work
OK for the rst 12 hours and start to warm up. If the cus-
tomers’ complaint is “works OK for 2 to 5 days and then
warms up” the unit may have an internal problem. To test
this it would be necessary to operate the cooling unit for
up to 24 to 48 hours in the test mode.
9.8 Food Storage
Proper refrigeration requires free air circulation within the
food storage compartment. Restricted air circulation within
this compartment will cause higher cabinet temperatures.
To remedy this situation, simply rearrange your foodstuffs.
It is also essential that the shelves are not covered with
paper or large storage containers. Always remember to
allow for proper air circulation. Odorous or highly avored
foods should always be stored in covered dishes, plastic
bags or wrapped in foil or waxed paper to prevent food
odors. Vegetables, lettuce, etc., should be covered to re-
tain their crispness.
Note: NEVER PUT HOT FOOD INTO THE RE-
FRIGERATOR.
To reduce frost formation in and on the freezing compart-
ment, cover stored liquids and moist foods and do not
leave the door open longer than necessary. When the
refrigerator is heavily loaded, it takes a longer time for
refrigerator temperatures to lower, also increasing the ice
making time. A very heavy load may also cause excessive
frosting. Defrosting every 7 to 21 days would be normal,
depending on the humidity level.
9.9 High Humidity
High humidity may cause a small amount of condensation
to form on the frame of the refrigerator. In some cases it
can develop to such a degree that it will run off the frame.
As the humidity is reduced, the sweating will decrease.
High humidity can also be a factor in rapid formation of
frost. If the frame between the doors is sweating the cli-
mate control heater(s) should be tested. Section 5.6.