Why Fridge Defend Fan Controller is Superior for Dometic and Norcold RV Fridge

• Why Fan Control Introduction
• Roof Vent Air Flow Roof Vent
• Side Vent Air Flow Side Vent
• Wind and your RV Wind Stagnation
• What is Wrong Factory Fans Fan Recirculation
• Where the Fan Sensor Is Our Location
• Install Fan Sensor Fridge Defend Sensor
• Adjustable Fan Temperature Fridge Defend Fan Settings

We will explain why you may want the Fridge Defend + Fan Control using the following two drawings, one side vent and the other a roof vent cutaway.

Roof Vent Cutaway Drawing

The best reason to use the Fridge Defend + Fan Control is to improve efficiency of your fridge by the following methods:

• Circulation of Cooling within Fridge Increases Efficiency: Our fan controller only runs when it is needed, that is when refrigerant is being produced. A fan inside your fridge controlled by our controller takes the hot air off the top of your fridge and cools it on the cooling fins thereby increasing efficiency and helps shorten the time the cooling unit runs. Further, the fans turn off when they are not needed, if the fan inside the fridge runs all of the time, it results is losses within the fridge that requires the cooling unit to run too much.

  
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• The Fridge Defend + Fan Control keeps your Cooing Unit Efficient: by keeping a constant supply of cool air, and sucking out the hot air within your cooling unit compartment, your fridge runs much more efficient.

Side Vent Cutaway Drawing

• Factory Fans Fail: The factory installed fans can fail and you have to remove your fridge to replace them in most installs. The factory fan switch usually degrades in accuracy over time so that the fans either never run or run all of the time. The factory fans can re-circulate the hot air within the cooling unit compartment in conditions described below, thus they do not remove the hot air when the fridge needs it most.

• Precision Fan Switch Fridge Defend + Fan Control has a precision 2% remote sensor that can be mounted in the best place on the cooling unit. In addition, the controller can control up to 5 Amps of fans thereby giving you the ability to use multiple fans.

• Fully Adjustable ON/OFF Setting: The Fridge Defend + Fan Controller is fully adjustable for the temperature at which the fans turn on and off. This gives you full control, no more wasting precious electrical energy while having a warm fridge.

Why RV Fridge Cooling Fans -- Wind Cooling Stagnation

The front view of an RV with a side wind drawing shows the dynamics of air flow across your RV when the wind blows. If the wind is blowing from the opposite side of your RV from the location the fridge is installed, then you could be suffering cooling unit ventilation stagnation. In short, as the wind hits the RV from the right of the figure, the air has to compress to go over the top of the RV. On the downwind side of the RV, an eddy is formed by the wind currents. This can cause stagnation or re-circulation of the hot air within the cooling unit compartment. The Fridge Defend by ARP alone (without fan control) will protect the fridge in this situation. But, having the Fridge Defend + Fan Control will evacuate the hot air faster. The result, wind gusts that would result in the fridge boiler over heating can now be resolved faster, how? We cannot claim to be able to use a fan to overcome mother nature, but what we can do is turn off your fridge when the boiler starts to overheat and use fans to help get that hot air out of the cooling unit compartment by pulling in cool air and sucking out hot air.