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Here I’ll show you how I installed a Klevakool caravan fridge internal fan kit in our Jayco Swan camper trailer.

These small 3-way fridges tend to get packed tight which limits air circulation

[this also keeps the cold air next to the thermostat which gives a false reading]

The internal fan kit solves this problem.

But if the fridge isn’t running well in warmer weather in the first place?

Then here’s the first step:

1. Install a caravan fridge external fan mod kit

If your fridge isn’t generating cold air in the first place, then an INTERNAL fan won’t make too much of a difference.

Installing one of these EXTERNAL fan mod kits helps to address a common problem in Jayco camper trailers:

Heat can’t escape from behind the fridge which effectively makes it stop cooling.

These 12V fan kits help to remove the trapped heat so the fridge can work more efficiently

Klevakool Fridge Fan Mod Kit - Jayco Swan Camper Trailer Installation - Step-By-Step With Pictures

[they’re that good they ranked 3rd in the list of the 35 Most Popular Jayco Camper Trailer Modifications]

2. Buy a Klevakool Caravan Fridge Internal Fan Kit

These are made by 3DprintRV (the same place I bought my external fan kit)

This is what was included in my Klevakool caravan fridge internal fan kit:

  • Thermostatically controlled fans that are mounted on a 3D printed base
  • Power cable
  • Bootlace terminals
  • A plastic filament

Klevakool Internal Fan Kit - Contents

As soon as I opened the box it looked like one of my final comments from this article about the external fan mod kit was relevant here too:

Simple to install, fits like a glove, and every little thing you need for installation is included.

Klevakool Internal Fan Kit to Fit Thetford 3 Way Fridge

3. Tools used for the internal fan kit installation

Here’s everything I needed:

  • Small flat blade screwdriver
  • Wire strippers
  • Pliers

Although it’s not a tool, it’s worth mentioning I also used a bit of sticky tape.

4. Remove the vent covers from the side of the van

Remove both covers because you’ll need access to both the top and bottom vents.

Remove Vent Covers For Caravan Internal Fridge Fan Kit on Jayco Camper Trailer

To remove the vent cover it was a case of simply sliding over these little black locking slider clips:

Removing the Vent Cover on a Jayco Swan Camper Trailer

5. Use the plastic filament to feed through the power cable

One option is to feed the power cable through the hose that runs outside from the drip tray.

Our Thetford 3-Way Fridge doesn’t have a drip hose though (it has a solid drip tray that you need to empty by hand).

So instead I ran the plastic filament through the hole that the thermostat probe comes out of:

Feeding Plastic Filament Through Thermostat Probe Hole

Then it was just a case of sticky-taping the power cable to the plastic filament…

Sticky Tape Power Cable to Plastic Filament

…and then on the outside pulling the plastic filament through the bottom vent

Pulling Plastic Filament and Power Cable Through Vent For Caravan Fridge Fan Kit

[which brings the power cable through too]

6. Press the base of the fan onto the fridge’s cooling fins

Here’s where it makes sense to buy a 3D printed fan kit that’s designed for this purpose:

All I needed to do was line-up these metal clips…

Metal Clips on Back of Klevakool Internal Fridge Fan Kit

…and the unit clipped straight onto the cooling fins.

Klevakool Internal Fridge Fan Kit Clipped Inside Thetford 3 Way Fridge in Jayco Swan

Then from the outside I pulled the rest of the wire through so it was neat and tidy inside the fridge:

Klevakool Internal Fridge Fan Kit Clipped Inside and Cable Pulled Through

7. Connect the power cable to the external fan kit’s PCB connector

Here I pulled the power cable up out of the top vent…

…then cut it to a length so it could neatly join in with the external fan mod PCB connector.

I used the wire strippers to leave about 10 mm:

Power Cable for Klevakool Internal Fridge Fan Kit Stripped for Connectors

And then used the pliers to crimp on the bootlace terminals.

Power Cable Connectors Crimped On For Klevakool Caravan Internal Fridge Fan Kit

Using the small flat bladed screwdriver the power cable just plugged into the PCB connector of the external fan mod kit

Power Cable For Klevakool Internal Fan Kit Plugged Into PCB of External Fan Mod Kit

[the wire with the white stripe is the Negative]

8. Test to see if everything works

After making sure that the battery switch was on, the final step was to move the PCB controller switch from ‘AUTO’ to ‘TEST

This turned on the external fan and gave power to the internal fridge fan.

Testing the Klevakool Caravan Fridge Fan Mod Kit - Changing AUTO to TEST - Blue Light

When I flicked the switch to ‘FAN’…

Testing Klevakool Internal Caravan Fridge Fan Kit


And to ‘LED’… pretty:

Testing Klevakool Internal Caravan Fridge Fan Kit with LED Switched On

[and yes it really was that hot in our Jayco Swan the day I installed this!]

But the real test?

I plugged our Swan into 240V and turned on the fridge…

…and about 20 minutes later both the external and internal fans turned on

The next morning:

Klevakool Caravan Internal Fridge Fan Kit in Jayco Swan Camper Trailer - Thetford 3 Way Fridge

That was A LOT quicker!

Summary: Installation and review of the Klevakool Caravan Fridge Internal Fan Kit

Here’s how I installed an internal fan in our Thetford 3-Way Fridge in our Jayco Swan.

I found this Klevakool caravan fridge internal fan kit (here from 3DprintRV) to be very well made and easy to install:

It solves the problem if the fridge is full which limits circulation.

But remember:

The external mod should be installed first because it provides the biggest improvement in fridge performance.

Click here if you would like to see the installation and review of that one…

…or here for the rest of the 35 Most Popular Jayco Camper Trailer Modifications