Dometic NDR1062 | NDM1062 | Fridge Defend RV Refrigerator Safety

Both the Dometic NDR1062 & NDM1062 refrigerators require boiler monitoring for safety. The Fridge Defend is a patented boiler monitor that when installed and maintained correctly will improve safety, efficiency, and reliability of your 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.

About Dometic 10 Cubic Foot Cooling Units

The 10 cubic foot Dometic refrigerators are found in both Class-A and Fifth Wheel type RVs. These fridges are very durable as long as the cooling unit is not allowed to overheat. Overheating can occur due to driving up steep hills, wind conditions that prevent ventilation of the cooling unit, and other factors that are too numerous to mention here.

The good news, the patented Fridge Defend addresses all of the issues that result in cooling unit overheating. How? The Fridge Defend monitors the heart of the cooling unit, the boiler. If the boiler overheats, the cooling ceases, and in turn damage to the cooling unit results.
Click here to see how the ARP helps prevent these problems.

Dometic NDR1062 Safety

Dometic NDR1062 & NDM1062 ARP Sensor Install

This photo shows the NDR1062 boiler with the ARP temperature probe installed on the boiler tube. Please note that the boiler tube is behind the flue tube. Be careful not to put the temperature probe on the flue tube. Also, make sure the probe is insulated from the flue tube so that the flue does not heat the ARP temperature sensor.

One of the most common mistakes on the Dometic cooling units is to place the ARP temperature sensor on the flue tube. The result is that the ARP will trip soon after starting the refrigerator when run from the LP Gas. If the ABS variable is checked in the SetUp mode, very high readings will be displayed, in excess of 230 degrees Celsius.

The second most common mistake is to forget to insulate between the flue tube and the sensor. If there is an air space between the sensor and the flue tube the sensor will pick up heat from the flue tube.

Please click here for temperature sensor install video.

Dometic NDR1062 Temperature Sensor

This photo is a close up of the above photo. Please note that the ARP temperature sensor is mounted on the boiler tube which is easily identified by the electric heater being welded to the boiler tube. In this picture, the flue tube is behind the insulation and to the right.

Dometic 1062 Cooling Unit Mounting

ARP Control Mounting Location

The next two images show the mounting locations for the Fridge Defend black box. The first drawing shows the control mounted on the Dometic 1062 control box in the cooling unit compartment. This is a desirable location unless there is equipment in the way as shown in the next photo.

NDR1062 Cooling Unit

This next photo was sent to us by a happy camper to show his installation. Note that the Fridge Defend by ARP was simply mounted on the sheet metal plate in front of the boiler. This made the display of the ARP easy to see through the vent when aligned correctly.

Wiring ARP Control 10 Cubic Foot Dometic Fridge

NDM1062 & NDR1062 (2-Way with Recall)

Click here if your fridge has a boiler thermal switch that is wired in line with the power supply.

ARP Fan Install

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

Please see the full ARP User Manual and Installation Guide for more information needed before using your ARPrv Control.

NDR1062 Wiring

Dometic NDR1062 & NDM1062 Factory Wiring

We are providing an image of the NDR1062 wiring diagram sticker. These stickers are usually not readable, please print the photo to the left if you need additional wiring information.

We understand that questions can arise, we at ARP Control are here to help you. We want you to be happy campers, so please do not hesitate to ask questions. It is our preference to send us an e-mail using the Contact Us form located at the top and bottom of the page. If you need immediate help, you are welcome to call.

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.

ARP Control Boiler Temperature 185-195 185-195 Celsius
Off-Level Operating Limit dependent on ambient conditions
Minimum DC Power Supply 9.6 9.6 VDC
Maximum DC Power Supply 22 22 VDC
Maximum AC on 12VDC Supply Line 6 6 VAC


Board 12VDC Fuse 3 3 Amp
Board AC Fuse 5 5 Amp

AC Power

Operating Range 100-132 100-132 VAC

DC Heaters

DC Heater Power Rating -- -- Watts
Current -- -- Amps
Heater Resistance per Heater (cold) -- -- Ohms
Fuse -- -- Amps

AC Heaters

AC Heater Power Rating 325 325 Watts
Current 2.7 2.7 Amps
Heater Resistance per Heater (cold) 44 44 Ohms

LP Gas

Gas Pressure 10.5-11.5 10.5-11.5 inch w.c.
Gas Jet #58 #58
Gas Thermocouple 25-35 25-35 mili-Volts
Electrode to Burner Gap 3/16 3/16 inch

Fridge Temperature Sensor

Thermistor @ 33degF to 35degF 7k-10k 7k-10k Ohms
Please click here for more information on Dometic thermistor troubleshooting.

Dometic Service Manual Downloads

⇑ See above for troubleshooting info on this page ⇑

Service Manual Download: NDR1062

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