Dometic Temperature Control Instability

Interior temperature fluctuates widely; bottles experience frequent warming and cooling cycles.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Faulty temperature sensor, poor sensor placement, control board hysteresis settings off, fan not circulating air properly

Safety: Unplug the unit before accessing sensors or fans.

Steps:

Verify sensor mounting: Ensure the cabinet temperature sensor is in a stable airflow area, not directly in front of the evaporator outlet.
Check fan operation: Confirm the interior fan runs when cooling is active to mix air.
Test sensor: Measure resistance and replace the sensor if readings are erratic or out of spec.
Control board: If hardware is good but temperature swings remain extreme, the main control PCB may be misregulating and require replacement.

Medium 3/5

Cabinet Temperature Sensor (NTC Probe)

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