Fix My Fridge

Specialists in the repair and service of 12v & 24v truck, campervan & boat fridges

Manuals and Articles

Title Description
Adding a Filter Drier to a Frigomatic System

A filter drier may be added to the system if the evaporator is freezing randomly which indicates the gas charge has not be lost but there is a blockage. Do not confuse with an undercharged system. This can be caused by moisture in the system or debris which works its way around the system blocking the capillary tube. The filter drier has the possibility of collecting the offending items and holding them, this can then allow the system to operate without issue.

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Removing Danfoss BD35 BD50 Controllers

How to remove a BD35/BD50 Danfoss controller

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Diagnosing an Intermittent Blockage

Download the attached manual if you are having issues with an intermittent problems with your system.  It is likely that moisture is in the system which is freezing on the cap tube.  This manual produced by Coastal Climate Control in the US explains the likely cause and recommended solutions for removing moisture from a refrigeration system. 

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Fault finding - My fridge is too warm

If your fridge is too warm there are several possible reasons – the thermostat is not set correctly, the fridge box or freezer plate is iced up, the fridge or freezer compressor is only working intermittently, the door seals are poor or the door is not closing properly or the thermostat is faulty.

Fault finding - My fridge is too cold

If your fridge is too cold and you find that you are freezing your tomatoes and salads, the most likely cause of the problem will be the thermostat. There are three possible reasons:–

• the thermostat is not set correctly

• the probe is not sensing correctly

• or the thermostat is faulty

Is Your 12 or 24v Fridge too Cold.pdf
Initial fault finding flow diagram

Use this manual to start identifying what is wrong with your fridge

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Fridge/freezer not Cold Enough

Is Your Fridge or Freezer not Cold Enough?
If your fridge is too warm there are several possible causes:
• the thermostat is not set correctly,
• the fridge box or freezer plate is iced up,
• the compressor is only working intermittently,
• the door seals are poor or the door is not closing properly
or the thermostat is faulty.

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12v/24v Fridge/freezer is not Working but the Interior Light is On

If your fridge is not cooling and the interior light is on or the fan is running, the problem is likely to be your power supply to the fridge – Not the fridge itself. Before you start spending money on spare parts or refrigeration engineers, check the following:

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Is Your 12v/24v Fridge/freezer not Working and the Interior Light is off?

If your fridge is not working and the interior light is off the problem is likely to be your power supply to the fridge – Not the fridge itself. Check the following:

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Checking the Refrigerant Charge in 134a Fridge or Freezer systems

The following information is intended to allow you to check the charge of your fridge or freezer without touching the system. It will describe what symptoms to look for in a correctly charged capillary system. Working with refrigerants involves potentially dangerous pressures and temperatures and precautions must be taken to avoid injury or release or environmentally harmful gases into the atmosphere.

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Danfoss BD35 & BD50 Diagnostics

The Danfoss BD35 and BD50 compressors have their own fault diagnostic allowing easy fault finding. The fault code will only be shown when the compressor fails to start or stops.

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Power supply testing on Danfoss DC powered refrigeration systems

To properly test the power supply to a Danfoss powered 12v or 24v system, the following testing procedure must be carried out. This will establish whether the power supply feeding the system is free of bad, loose and/or high-resistance connections. Reading the voltage on the panel or at the batteries is meaningless, as is the fact of a new installation or new batteries. Size and the capacity of the battery bank is also irrelevant.

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Fridge/Freezer Cabinet Check List

If your fridge is not getting cold enough or you are experiencing excessive condensation or your freezer is icing up, air is getting into your fridge and the moisture from this air is causing excessive water to build up in your fridge. Start by checking the following:

     Check the door seal is sealing correctly
     Check the door alignment and that it is closing correctly
     Check there are no other gaps or unplugged holes in the fridge
Cabinet Check List.pdf
Danfoss BD35F Direct Current Compressor Technical Data Sheet

Danfoss technical data sheet for BD35 compressor

Confirms correct standard wiring

Low voltage protection etc..

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DC Fridge V 3 Ways Fridge

Information on how a 12/24v compressor fridge works compared to a 3 way fridge and the advantages of one against the other.

DC Compressor fridge v 3 Way Fridge.pdf