Norcold Fan | Fan Kit | Fan Switch | Fan Noise | Ventilator Fan

Problems cooling in hot weather? You may need our Norcold fan kit, it replaces the standard fan switch with a precession temperature sensor and ventilator fan with adjustable temperature.


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.

Benefits of Norcold Fan Kit -- Efficiency!

The Fridge Defend Fan Control improves Norcold fridge efficiency by delivering cool air where it is needed the most. Our Fan Control has a precision fan sensor that is mounted so that the fans will only run when needed, this saves your batteries. Also, using high volume and low amperage blowers moves more air quietly. The result, RV fridge hot weather performance is vastly improved, now you can have hard ice cream again!

Norcold Fan Norcold Fan Kit

Lower Norcold Vent

These images show the Norcold lower cooling unit vent door. The first drawing is looking straight on at the back side of the vent with the vent door removed. The Lower drawing is a side view to help understand the positioning of the fan with the flow shown with blue arrows.

It is easy to mount the fan, the fan can be attached to the door of your Norcold with nylon wire ties (zip-ties).

When mounting the blower on the vent door, use long power leads so that the door can be removed and set down on a table or the ground without removing the leads.

Norcold Upper Vent Norcold Slide-Out Vent

Norcold Upper Side Vent

There are two methods for venting the top of the Norcold cooling unit compartment. One is a roof vent and the other is the side-vent shown above.

If your Norcold has an upper side-vent, we recommend a second blower fan mounted on the side-vent door. The blower is positioned so that the intake pulls the hot air from inside the cooling unit compartment and pushes it directly outside. This gets the hot air away from your rig and maintains happy camper status :) It has been reported that the Fridge Defend keeps the inside of the RV cooler by getting the heat away from the RV.

As with the bottom vent door, nylon wire ties can mount the ARP blower fan directly to the door.

Norcold Fan Improvement

RV Fridge Fan Sensor

This drawing shows the ARP fan sensor installed on the absorber coil

The Norcold fan sensor/switch can be attached to the absorber coil with a typical hose clamp. The lower absorber coil in some applications may get too hot, therefore the ARP fan sensor can be clamped to the second coil from the bottom if this is the case. Also, if you have a Norcold side-by-side fridge with an Amish cooling unit, there are two sets of absorber coils, if one set of coils feels hotter than the other, mount the sensor on this set of coils.

Put the hose clamp around the eyelet part of the sensor. Avoid putting the clamp where the temperature sensor is located, this would be the cylindrical part if the sensor where the wires exit.

The advantage to a hose clamp is that the absorber coil temperature is averaged at the sensor due to the clamp being wrapped around the absorber coil.

Norcold Fan Switch

Norcold Fan Setting Adjustment

This chart shows the adjustment of fan on/off temperature.

The temperature at which the fan will turn on your Norcold is adjustable by using the ARP Setup mode. The table to the left shows the fan setting number within the setup mode and the corresponding temperatures at which the fans will kick on and off.

NOTE: v4.1, see table in Troubleshooting Guide: Fan Setting. This version of control has finer adjustment, default setting is 125°F.

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