Q: Why is the AUTO symbol not visible on the TFT screen of my Dometic RML 10.4T refrigerator?

On your Dometic RML 10.4T, the AUTO symbol appears on the TFT screen when the automatic mode is activated. This mode automatically selects the most economical power source (AC > DC > gas). If the AUTO symbol does not appear, check the following points: Screen brightness - The display automatically reduces its brightness after 30 seconds of inactivity. Use the rotary knob to increase the brightness and see all the symbols. Activation of AUTO mode - Access the operating menu via the rotary knob and confirm that the automatic mode is indeed selected. Error codes - A displayed error code may obscure the normal symbols. If such a code appears, refer to the manual for interpretation. If the symbol remains absent after these checks, contact Dometic support for a complete diagnosis.

Q: Why is the automatic mode of my Dometic RML 10.4T refrigerator not working?

The automatic (AUTO) mode of the Dometic RML 10.4T automatically selects the most economical power source in this order of priority: AC (230 V) > DC (12 V) > gas. Here’s how to check and activate the AUTO mode: Activating AUTO mode Press and hold the control button for 2 seconds to start the device Navigate on the TFT screen to the Operating Mode Menu Select AUTO (and not AC, DC, or GAS separately) Ensure that the AUTO symbol is displayed on the screen Checks if AUTO mode is not working AC Power (230 V): Is the device plugged into the mains? The voltage must be at least 190 V (error code W05 = insufficient voltage) DC Power (12 V): Is the battery or external power supply properly connected? (error code W06 = not connected) Gas: Is the gas valve open and the bottle filled? Single Source: AUTO mode requires at least two power sources available . Ensure that at least two power supplies are present Recommended actions Completely restart the device (hold the button for 4 seconds until the beep, then turn it back on) Check the AC, DC, and gas symbols on the TFT screen Note any error codes displayed (W05, W06, E07, E08, E09, etc.) If the problem persists after these checks, refer to the error codes section of your manual or contact Dometic technical support.

Q: How do I reset the control screen of my Dometic RML 10.4T refrigerator?

The DOMETIC RML 10.4T does not offer a 'factory reset' for the display as such. However, you can clear the displayed error codes through a simple procedure. Error Code Reset Procedure Press and hold the rotary control button on the touch display for 2 seconds . You will hear a confirmation beep (the sound can be turned off in the settings). The error codes (E07, E08, E09, E14, E50, E51, E52, E53, etc.) will then be cleared. This reset clears the error codes but does not reset the operating settings. If an error code reappears regularly (for example E07 in gas mode), the underlying issue persists and requires technical diagnosis.

Q: How do I clean and maintain my DOMETIC RMD 8505 refrigerator?

Regular cleaning of the appliance Before any operation, unplug the appliance from the power supply . Regularly clean the refrigerator with a damp cloth, then dry with a dry cloth. Do not use aggressive products or hard objects, and avoid mechanical means to remove frost. Essential maintenance points Defrost water drainage - Regularly check that the defrosting system is not blocked; otherwise, water will accumulate at the bottom of the refrigerator. External ventilation grilles - Ensure they are free of dust and dirt to guarantee heat escape and maintain cooling power. Roof fan - Keep it free of dust to avoid damage and loss of cooling power. Gas burner - Clean at least once a year (every 2-3 months with LPG depending on soiling) with a cleaning brush suitable for soft bristles, then purge with compressed air. Regular maintenance ensures the proper functioning and longevity of your DOMETIC RMD 8505.

Q: How to identify the voltage of my CoolMatic CRX 80S - 12 volts or 24 volts?

The CoolMatic CRX 80S can operate on 12 V or 24 V DC depending on your electrical installation. Here’s how to identify the voltage of your appliance: 1. Check the nameplate Look at the label located at the back or on the side of the refrigerator It clearly indicates the nominal voltage: "12 V" or "24 V" This information is usually found near the serial number 2. Check your boat's electrical system Look at the main battery: a 12 V battery is simple, while a 24 V system uses two 12 V batteries connected in series Refer to the boat's wiring diagram or the documentation provided with the system Check the recommended fuses for this voltage: 15 A for 12 V, or 7.5 A for 24 V 3. Measure with a multimeter In DC mode, measure the voltage at the terminals of the refrigerator A 12 V system should display around 12-13.6 V (or at least 11.7 V on restart) A 24 V system should display around 24-27 V (or at least 24.2 V on restart) For shore power supply If you are using a 230 V AC converter, it must be configured to provide the correct DC voltage (12 V or 24 V) that your refrigerator expects. Ensure that your rectifier or converter is compatible with your installation.

Q: The LED indicator flashes once - what does this error code mean?

A single flash of the red LED indicator indicates a low voltage (Under-voltage) . This means that the supply voltage is outside the allowed range. Minimum required voltages: 12V system: minimum 10.4 V 24V system: minimum 22.8 V Diagnostic and correction steps: Check the voltage: Use a multimeter to measure the voltage between the terminals. It should reach the minimum required according to your system Inspect the connections: Ensure that all cables are securely tightened to the terminals and that there is no corrosion Check the cable gauge: An insufficient cable gauge causes a voltage drop. Refer to the sizing charts in the manual to adjust the gauge according to the distance Check the battery: If the voltage is below the minimum, your battery needs charging or is faulty If the voltage and connections are correct, there may be an internal electronic issue. Contact Dometic support.

Question 1

How to clean the condensation drainage pipe?

Accepted Answer

The condensation drainage pipe of the CombiCool RF 60 must remain clean to ensure the proper functioning of your refrigerator. If this pipe is blocked, condensation water will accumulate at the bottom of the appliance.

Cleaning Procedure

Locate the drainage pipe, usually found at the back or bottom of the appliance
Clean it regularly to remove residues, dust, or debris that could block it
Check the flow: condensation should escape properly to the outside of the appliance

Important: When cleaning your appliance, avoid pouring water directly on the door seals, as this may damage the internal electronic components.

Question 2

Where can I find the images and diagrams in the DOMETIC CombiCool RF 60 manual?

Accepted Answer

The images can be found in the PDF reader

The CombiCool RF 60 manual contains 15 numbered figures and diagrams spread over the 520 pages of the manual. Here’s how to access them:

Use the built-in PDF reader

Scroll through the document at the top of the page - it currently shows page 55/520. Use the arrows or scroll bar to navigate between pages and discover the illustrations.
Enlarge the images by clicking the "+" button for better readability.
Reduce the zoom with the "-" button if needed.
View in full screen via the display option (corner button).

Main diagrams included

Fig. 2 - Control panel with selector, thermostat, and power button
Installation diagrams - Door hinge reversal, gas and electrical connections
Defrosting procedures - Illustrated steps with images
Product photo - General view of the refrigerator

Alternative: download the PDF

You can download the complete manual in PDF via the link at the bottom of the manual to view all diagrams offline.

Question 3

How do I access the operating mode menu of my Dometic RML 10.4T refrigerator?

Accepted Answer

The operating mode menu (also called the Operating Mode Menu) allows you to choose between the different available operating modes: AUTO, AC, DC, or gas. Here’s how to display it:

Accessing the operating mode menu

Turn the rotary knob on the TFT touchscreen until you reach the second section of the menu (Operating Mode Menu)
Wait for the operating mode options to appear in blue on the screen
Press the rotary knob to select the desired mode

The RML 10.4T offers three main operating modes:

AUTO Mode: the refrigerator automatically selects the most economical mode available in the order AC > DC > gas (requires at least two power sources)
AC Mode: operation on 230V mains
DC Mode: operation on 12V battery
Gas Mode: operation on propane/butane gas

If the touchscreen is unresponsive, try resetting the control system by turning the unit off for a few minutes and then turning it back on.

Question 4

Why is the AUTO symbol not visible on the TFT screen of my Dometic RML 10.4T refrigerator?

Accepted Answer

On your Dometic RML 10.4T, the AUTO symbol appears on the TFT screen when the automatic mode is activated. This mode automatically selects the most economical power source (AC > DC > gas).

If the AUTO symbol does not appear, check the following points:

Screen brightness - The display automatically reduces its brightness after 30 seconds of inactivity. Use the rotary knob to increase the brightness and see all the symbols.
Activation of AUTO mode - Access the operating menu via the rotary knob and confirm that the automatic mode is indeed selected.
Error codes - A displayed error code may obscure the normal symbols. If such a code appears, refer to the manual for interpretation.

If the symbol remains absent after these checks, contact Dometic support for a complete diagnosis.

Question 5

Why is the automatic mode of my Dometic RML 10.4T refrigerator not working?

Accepted Answer

The automatic (AUTO) mode of the Dometic RML 10.4T automatically selects the most economical power source in this order of priority: AC (230 V) > DC (12 V) > gas. Here’s how to check and activate the AUTO mode:

Activating AUTO mode

Press and hold the control button for 2 seconds to start the device
Navigate on the TFT screen to the Operating Mode Menu
Select AUTO (and not AC, DC, or GAS separately)
Ensure that the AUTO symbol is displayed on the screen

Checks if AUTO mode is not working

AC Power (230 V): Is the device plugged into the mains? The voltage must be at least 190 V (error code W05 = insufficient voltage)
DC Power (12 V): Is the battery or external power supply properly connected? (error code W06 = not connected)
Gas: Is the gas valve open and the bottle filled?
Single Source: AUTO mode requires at least two power sources available. Ensure that at least two power supplies are present

Recommended actions

Completely restart the device (hold the button for 4 seconds until the beep, then turn it back on)
Check the AC, DC, and gas symbols on the TFT screen
Note any error codes displayed (W05, W06, E07, E08, E09, etc.)

If the problem persists after these checks, refer to the error codes section of your manual or contact Dometic technical support.

Question 6

How do I reset the control screen of my Dometic RML 10.4T refrigerator?

Accepted Answer

The DOMETIC RML 10.4T does not offer a 'factory reset' for the display as such. However, you can clear the displayed error codes through a simple procedure.

Error Code Reset Procedure

Press and hold the rotary control button on the touch display for 2 seconds.
You will hear a confirmation beep (the sound can be turned off in the settings).
The error codes (E07, E08, E09, E14, E50, E51, E52, E53, etc.) will then be cleared.

This reset clears the error codes but does not reset the operating settings. If an error code reappears regularly (for example E07 in gas mode), the underlying issue persists and requires technical diagnosis.

Question 7

How do I clean and maintain my DOMETIC RMD 8505 refrigerator?

Accepted Answer

Regular cleaning of the appliance

Before any operation, unplug the appliance from the power supply. Regularly clean the refrigerator with a damp cloth, then dry with a dry cloth. Do not use aggressive products or hard objects, and avoid mechanical means to remove frost.

Essential maintenance points

Defrost water drainage - Regularly check that the defrosting system is not blocked; otherwise, water will accumulate at the bottom of the refrigerator.
External ventilation grilles - Ensure they are free of dust and dirt to guarantee heat escape and maintain cooling power.
Roof fan - Keep it free of dust to avoid damage and loss of cooling power.
Gas burner - Clean at least once a year (every 2-3 months with LPG depending on soiling) with a cleaning brush suitable for soft bristles, then purge with compressed air.

Regular maintenance ensures the proper functioning and longevity of your DOMETIC RMD 8505.

Question 8

How to identify the voltage of my CoolMatic CRX 80S - 12 volts or 24 volts?

Accepted Answer

The CoolMatic CRX 80S can operate on 12 V or 24 V DC depending on your electrical installation. Here’s how to identify the voltage of your appliance:

1. Check the nameplate

Look at the label located at the back or on the side of the refrigerator
It clearly indicates the nominal voltage: "12 V" or "24 V"
This information is usually found near the serial number

2. Check your boat's electrical system

Look at the main battery: a 12 V battery is simple, while a 24 V system uses two 12 V batteries connected in series
Refer to the boat's wiring diagram or the documentation provided with the system
Check the recommended fuses for this voltage: 15 A for 12 V, or 7.5 A for 24 V

3. Measure with a multimeter

In DC mode, measure the voltage at the terminals of the refrigerator
A 12 V system should display around 12-13.6 V (or at least 11.7 V on restart)
A 24 V system should display around 24-27 V (or at least 24.2 V on restart)

For shore power supply

If you are using a 230 V AC converter, it must be configured to provide the correct DC voltage (12 V or 24 V) that your refrigerator expects. Ensure that your rectifier or converter is compatible with your installation.

Question 9

My voltmeter shows 11 volts - why isn't the refrigerator cooling?

Accepted Answer

11 volts is too low for your CoolMatic CRX 80S to operate normally. Here’s why:

Minimum Required Voltages

12V System: The refrigerator automatically shuts off at 10.4V and only restarts from 11.7V. At 11V, the appliance cannot cool.
24V System: The minimum voltage is 22.8V. At 11V, the fridge will not operate at all.

Immediate Solutions

Recharge the battery - This is the most common issue. Use a charger compatible with your system (12V or 24V).
Check the connections - The cables at the battery terminals should be tight and free of corrosion. Clean with a wire brush if necessary.
Test the power source - If your refrigerator is in a motorhome or caravan, check that the alternator or site power supply is functioning properly.

Once the voltage is brought above 11.7V (for 12V) or 22.8V (for 24V), the refrigerator should automatically restart and resume cooling.

Question 10

The LED indicator flashes once - what does this error code mean?

Accepted Answer

A single flash of the red LED indicator indicates a low voltage (Under-voltage). This means that the supply voltage is outside the allowed range.

Minimum required voltages:

12V system: minimum 10.4 V
24V system: minimum 22.8 V

Diagnostic and correction steps:

Check the voltage: Use a multimeter to measure the voltage between the terminals. It should reach the minimum required according to your system
Inspect the connections: Ensure that all cables are securely tightened to the terminals and that there is no corrosion
Check the cable gauge: An insufficient cable gauge causes a voltage drop. Refer to the sizing charts in the manual to adjust the gauge according to the distance
Check the battery: If the voltage is below the minimum, your battery needs charging or is faulty

If the voltage and connections are correct, there may be an internal electronic issue. Contact Dometic support.

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