Troubleshooting - Dometic CD20 Service Manual

Troubleshooting

The refrigerator is designed for installation in trucks.
Dometic recommends that the unit be installed into a
fixed position. Once it is installed, only the front of the
appliance may be accessible. The refrigerator is only
suitable for cooling, freezing, and storing foodstuffs.
I The refrigerator is not intended for the proper
storage of medicine.
3 Troubleshooting
This section outlines the main causes of refrigerator
issues and helps to identify the potential causes.
Troubleshooting
Operational Issue
The refrigerator will not start.
The refrigerator tries to start, but it
immediately shuts off.
The door will not close properly.
The compressor runs, but the unit does
not cool.
There is excessive frost inside the unit.
There is a loud humming noise.
The thermostat assembly is blinking.
4
Potential Reason
The battery voltage is too low.
The control module is faulty.
The load dump board is faulty.
The thermostat assembly is faulty.
The battery voltage is too low.
The control module is faulty.
The compressor is faulty.
There is a loose wiring or power connection.
The thermostat assembly is faulty.
The door assembly requires adjustment.
The door seal is broken or faulty.
The bottom and/or top latch catch is misaligned or broken.
The thermostat assembly is not installed properly (CR models only).
The ambient temperature is too high.
There is insufficient ventilation.
The condenser is dirty.
The condenser fan is faulty.
The unit has experienced a loss of refrigerant liquid.
The thermostat assembly is faulty.
The NTC sensor thermistor is faulty.
The refrigerator door is not closing properly.
The compressor motor is locked.
The condenser fan motor is faulty.
The unit has a system error.
Review the Troubleshooting table to help identify the
suspected operational issue, the potential causes, and
the diagnostic procedure associated with those issues.
Refer to the Diagnostics table for links to specific
refrigerator components that show diagnostic tasks to
help you confirm the suspected operational issue and
potential cause.
Remember to check the basics before replacing
any parts, such as contributing issues. Refer to the
Maintenance (on page
23
Issues (on page ) sections for more detail.
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Refrigerators
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