Troubleshooting Poor Cooling in 12V Caravan Fridges

Intro
If your fridge isn’t staying cold, work through these checks in order. Most issues come down to power supply, ventilation, or airflow inside the cabinet.

Quick Checks

• Power supply - verify voltage at the fridge under load, not just at the battery.
• Ventilation - the rear cavity should be warm, not hot and stagnant.
• Door seal - look for gaps or torn gaskets.
• Thermostat setting - avoid extremes that cause short-cycling.

Inside the Fridge

• Don’t block internal air passages with oversized containers.
• Cool items before loading when possible.
• Defrost if ice build-up is insulating the evaporator.

Electrical and Wiring

• Check fuse and connections for heat or corrosion.
• Upgrade cable gauge if voltage drop is high over long runs.
• Confirm the fridge negative returns to the system bus, not thin chassis points.

When to Seek Service

• Compressor fails to start despite correct voltage.
• Unusual noises, burning smells, or repeated cut-outs.
• Persistent warm temperatures after ventilation and wiring fixes.

Bottom line
Healthy power, good airflow, and tidy packing solve most cooling problems. Fix those first before assuming a component has failed.

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