Door Position; Ambient Temperature; Cooling Unit; Food Storage - Dometic RM 3762 Service Manual

note: to form a proper seal, it is important not to
leave any gaps.

8.5 door Position

If the upper or lower door is closing too high or low against
the frame, cold air leakage can occur. Adding or deleting
a flat 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.

8.6 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. Im-
proper venting at this point will cause the cooling unit to
have reduced efficiency. A refer that chases the out-side
temperature is improperly vented or a weak cooling unit.

8.7 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 hy-
drogen, 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, first verify the AC heating element is good.
Proper ohms at room temperature. Proper venting and
unit is level. Then place approximately one gallon of water
inside the refrigerator and place a thermometer in one of
the containers of water. Next, unplug the thermistor from
the lower control board. This will by-passing the thermo-
stat control and operate for at least 12 hours. Then check
the temperature on the thermometer. 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 first 12 hours and start to warm up. If the
customers 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.

8.8 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 flavored
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 defrost-
ing. Defrosting every 7 to 21 days would be normal, de-
pending on the humidity level.

8.9 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 this occurs the climate control heater should be
tested.
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