Dometic RMD 10.5T • RMD 10.5X • RMD 10.5XT • RMD 10.5S • RMD 10.5XS

Dometic has introduced a new series of refrigerator for 2019, the 10.5 series. This is an absorption refrigeration system that requires the Fridge Defend to remain reliable and safe.

Table of Contents


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Dometic RML 10.5T, RML 10.5XT

Dometic RMD 10X & 10XL Overview

The new Dometic series of RV refrigerator breaks with their traditional model number scheme. For example, the excellent RM series of fridge made for 30 years told you the refrigerator capacity in cubic feet (cuft) in the model number. Dometic's 10.5 series is not a 10 cubic foot fridge, they are 5.4 and 6.3 cubic feet respectively.

Click here to see how the Fridge Defend by ARP helps prevent boiler overheat situations.

Click here to see how Dometic boiler operates and how the Fridge Defend protects it.

Can You Live Without The Fridge Defend?

Dometic RML 10.5T, RML 10.5XT Boiler

Dometic RMD 10.5 Fridge Defend Install Tips

This photo shows the Fridge Defend installation on a Dometic RMD 10.5 XT fridge. The insulation is the same as other 6 cubic foot domestic refrigerators. The Fridge Defend not only added safety to this fridge, it improved its performance due to the added ventilation with the v5.1 fan controller kit.

Dometic RML 10.5 Wiring Connector

Wire Fridge Defend

Plug ID Wire Description
A Power to Dometic Controller
B D+ Engine Alternator
C +12VDC Heater
D Ground to Dometic Controller
E No Connection
F Ground DC Heater

Use this drawing to wire the Fridge Defend with the Dometic 10.5 fridge. Note that the wires are identified in the plug end for the wires going to the fridge. The purple wire in position 'A' supplies power to the Dometic controller. The purple wire should have a 3 amp fuse in it, and this is the wire that is spliced for the Fridge Defend insulation.

Dometic RML 10.5T Wiring

Wiring Diagram and Description

Item # Item
1 Fan 2
2 Fan 1
3 S+ (optional)
4 DC Heater
5 DC Heater Relay (10A fuse)
6 4.2
7 Thermistor 1 (fridge)
8 Gas Valve
9 AC Heater
10 LP Burner
11 Connector Block
12 Lighting
13 Display
14 Heating Frame
15 Fan 2 (optional)
16 Fan 1 (option)
17 Options Module
18 DC Supply Oven (optipn)
19 DC Options Module
20 CI-Buss Connection
21 DC Power Supply
22 12V Terminal Housing
23 DC Supply Cable Electronics
24 DC Supply Heating Element
25 Internal DC Supply (Max 1A)
Dometic RML 10.5 Boiler Plate

Install Fridge Defend Boiler Sensor

At the bottom of the boiler housing are three tabs that are bent in to hold the bottom plate. Bend these tabs down to slide the inner boiler housing plate down. A dental tool can be handy for this job.

Please note that the fridge heaters should be accessible without moving the fridge forward. But some OEMs mount the fridge so that one has to move the fridge forward to access the heaters and to install the Fridge Defend boiler sensor.
Dometic RML 10.5 Boiler Safety Sensor

Once the bottom plate is removed, squeeze the boiler housing to unhook the seam that runs up the housing. This photo shows the Fridge Defend boiler sensor installed just above the electric heaters on the boiler tube.

The fiberglass insulation, GREEN ARROW, packed between the flue tube and the sensor prevents the heat from the flue tube from getting to the boiler sensor.

The sensor can be mounted closer to the heaters (RED ARROW). If sensor is close to the heaters please insulate the sensor very well.

Wrap fiberglass insulation around the Fridge Defend sensor wires (PURPLE ARROW). If these wires are not protected, the sheet metal can cut the wires.

Specifications Dometic RMD 10.5 Series

Item RMD10.5T RMD10.5XT Units
Dimensions - Depth 21.7 23.8 inch
Dimensions - Height 49.1 49.01 inch
Dimensions - Width 20.6 20.59 inch
Weight 88.2 91.5 lbs
Volume - Total 5.4 6.3 cubic-feet
Volume - Fridge 4.2 4.8 cubic-feet
Volume - Freezer 1.0 1.23 cubic-feet
12VDC Heater Input Current 14.2 14.2 Amp
12VDC Heater Input Power 170 170 Watts
AC Input Power 250 250 Watts

Dometic Service Manual Downloads

⇑ See above for troubleshooting info on this page ⇑

Service Manual Download: RMD 10T & RMD10XT.