Diagnostics; Diagnostic Pre-Checks - Norcold DE0041 Series Service Manual

Diagnostic Pre-Checks

Diagnosing problems begins by starting with the basics. In many
cases, the problem can be solved by verifying the unit is operating
in acceptable conditions. Before performing detailed diagnostics
make sure:
• The power switch / thermostat is in the ON position.
• The door is closed and sealing correctly.
• The refrigerator is correctly installed and that the vents are
not blocked.
• The vehicle fuse or circuit breaker is intact.There may be
more than one over-current device in the refrigerator supply
circuit. Be sure to check both the RV and refrigerator.
• The ambient temperature is not unusually high (more than
110° F. / 43° C.).
• The air circulation inside the refrigerator is not decreased by
foods or by shelves that are covered with plastic, paper, etc.
• The freezer is defrosted.
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DIAGNOSTICS

Disconnect wires from thermostat.
Put a jumper wire between terminals
#4 and #6 of the thermostat.
Refer to Fig. 4.
Does
YES
the refrigerator
operate?
NO
Put a jumper wire between terminals
COM and NO of the relay.
Refer to Fig. 5.
Does
YES
the refrigerator
operate?
NO
1. Remove the refrigerator from
enclosure (refer to "Remove
Refrigerator" section.
2. Do the tests in "Self - Test
Diagnostics" section.
Are any
YES
error codes
found?
NO
9
Replace the thermostat.
Replace the relay.
Refer to "Self - Test Diagnostic Chart."
Refer to Diagnostic Symptom Chart."
SERVICE MANUAL