RM211 • RM2150 •RM2190 • RM2201 • RM360 • RM361 • RM460 • RM461 • RM660 • RM661 • RM663 • RM760 • RM761 • RM763 • • RM2600 • RM2800 • RM3500 • RM2310 • RM2410 • RM2510 • RM2610 • RM2810

The Fridge Defend by ARP helps keep your Dometic reliable while increasing safety and efficiency. This is the install page for the 3, 4, 5, 6 & 8 cubic foot series of manual control Dometic fridge.


Table of Contents

Instructions: Subjects are listed on left. Click the link to the right to go directly to the subject matter on this page.

Dometic 3, 4, 5, 6 & 8 Cubic Foot Refrigerators

The Dometic 3, 4, 5, 6 & 8 cuft fridges are very efficient as long as the cooling unit boiler is not allowed to overheat. The problem with these refrigerators is that they are mostly found in slide-in campers, class-b, and other everyday driver type RV conversions. As a result there is a high failure rate due to off-level use and other factors associated with everyday driving that destroys the cooling unit. These refrigerators have the controls the bottom of the fridge. A thermocouple interrupter and relay are required to control manual control RV refrigerators, these parts are not provided with the standard Fridge Defend kits.

Please click here to see how the ARP Control can make your Dometic safer, more reliable & efficient.

ARP RM2353 RM2453 Wiring

Wiring Diagrams

As seen in this figure, the Dometic manual control refrigerator has the operator controls at the front bottom of the fridge. The actual controls reside at the back of the fridge. Often there is a plastic shield that covers the controls seen in this photo. Once the plastic cover is removed, identify what is shown as part (7) in this image, the red/yellow arrow points to the thermocouple screwed into the gas safety valve (10). Unscrew the thermocouple and insert the thermocouple interrupter.

Thermocouple Interrupt Adaptor

This next drawing shows the thermocouple interrupt adaptor attached to the gas safety valve and the thermocouple (TC). The TC interrupt has two electrical leads identified as terminals 1 & 2. As seen in the next image, these two terminals will be wired to the relay terminals 30 & 87.

Wiring RM2410

This image combined with the two above shows the compleate install and wiring of the Fridge Defend. Starting on the right, the relay interrupts the thermocouple signal to the gas safety valve, thereby turning off the gas flame it there is a cooling unit overheat situation. Below are links to further details for wiring.

Click here for interrupt adapter wiring details.

ARP Fan Install

Please click here for the ARP blower fan and temperature sensor installation.

Boiler RM2310 RM2510

Temperature Sensor Install

Click here for temperature sensor install video.

Click here for temperature install pictures and insulation methods.

Dometic Shore Power Wiring

Shore Power Wiring

This photo shows a relay that turns off the power to the shore power by wiring to the Fridge Defend and to the 120VAC heater. Click the link below for the relay used:

Shore Power Relay

Dometic Service Manual Repair Specifications

Please note that all of the following specifications are believed to be accurate. If any errors are found, please bring them to our attention as soon as possible. For critical specification please contact Dometic as they make changes to their specifications without notice.

FRIDGE MODEL: RM2310 RM2410 RM2510 RM2610 RM2810 Units
ARP Control Boiler Temperature 170-180 170-180 170-180 170-180 180-190 Celsius
Off-Level Operating Limit dependent on ambient and ARP boiler temp.
Minimum DC Power Supply 9.6 9.6 9.6 9.6 9.6 VDC
Maximum DC Power Supply 22 22 22 22 22 VDC
Maximum AC on 12VDC Supply Line 6 6 6 6 6 VAC


FRIDGE MODEL: RM2310 RM2410 RM2510 RM2610 RM2810 Units
Board AC Fuse 5 5 5 5 5 Amp
Board 12VDC Fuse 3 5 3 5 3 Amp

AC Power

FRIDGE MODEL: RM2310 RM2410 RM2510 RM2610 RM2810 Units
Operating Range 100-132 100-132 100-132 100-132 100-132 VAC

DC Heaters

FRIDGE MODEL: RM2310 RM2410 RM2510 RM2610 RM2810 Units
DC Heater Power Rating 125 125 175 215 215 Watts
Current 10.4 10.4 14.6 17.9 17.9 Amps
Heater Resistance per Heater (cold)1.15 1.15 0.82 0.82 0.82 Ohms
Fuse 30 30 30 30 30 Amps

AC Heaters

FRIDGE MODEL: RM2310 RM2410 RM2510 RM2610 RM2810 Units
AC Heater Power Rating 160 160 185 295 325 Watts
Current 1.3 1.3 1.5 2.5 2.7 Amps
Heater Resistance per Heater (cold)92 92 75 48 44 Ohms
Please click here for more information on Dometic thermistor troubleshooting.

Dometic Service Manual Downloads

Service Manual Download: RM2310, RM2410, RM2510, RM2610, RM2810

If you cannot find what you need please use the Contact Us form from the top menu.