Norcold 322 & 323

A well built Norcold 322 or 323 will last the life of your RV when it is protected by the Fridge Defend, this pages shows how to install boiler overheat protection on your fridge.


Norcold N305 & N306 Overview

The Norcold 322 & 323 series of fridge has a manual type control. This means that one has to hold the gas control valve button down and ignite the gas flame. The 32x series of fridge is a 1.7 cubic foot fridge that comes in both 2-Way and 3-Way versions, the 323 designates the 3-Way version.

The controls on this fridge are on the top as seen in this first image. The fridge will need to be slid forward to install the Fridge Defend. Due to the manual controls, the fridge defend cannot restart the LP gas if there is an overheat situation, the good news is that the fridge is protected.

Norcold 322 323 Mode Controls

Norcold 322 323 Gas Control Valve

The knob in yellow in this image is the gas control valve. One presses this to light the LP. It is on the back side of this switch/valve that the below thermocouple interrupt adaptor is located.

Norcold N305 N306 Wiring

322 & 323 Wiring

This image is the side view of the above gas control valve. This is the LP Gas safety valve that has the thermocouple interrupter switch attached to it. The red arrow points to the back of the valve where the thermocouple is screwed in. In this image, the wires are red, your wire color may differ, the procedure is the same. One of these wires needs to either be removed to insert the Fridge Defend relay, or one wire is spliced into to install the relay.

Norcold 322 323 Wiring

The full fridge wiring diagram is included in this image, often the wiring diagram sticker falls off the fridge. The thermocouple interrupt adaptor is marked in red on this image. See the drawing below for wiring of the Fridge defend by ARP relay.

Norcold 322 & 323 Wiring

This drawing show how to wire the Fridge Defend to the Norcold Part Number 621737 Interrupt, The ARP relay just breaks the signal to the safety valve thereby turning off the LP gas if the boiler overheats.

Note that in this image the color of the wire is just to make the image clear. If you have any questions during installation, please use the Contact Us form.

Please click here for another view for wiring the interrupt adapter.

Please click here if you want to control the 12VDC heater.

Norcold N440 N500 Electric Heater Boiler Tube

ARP Temperature Sensor Install

This photo shows the temperature sensor installed on the boiler tube.

The Norcold N30x series of fridges are very dependable refrigerators as long as the boiler is not allowed to overheat.

The Fridge Defend by ARP could help your refrigerator last the lifetime of your RV!

Norcold Service Manual Downloads

⇑ See above for troubleshooting info on this page ⇑

Service Manual Download: 322 & 323

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