Wiring Fridge Cooling Fan

[VXman]

After some advice on wiring up my newly purchased fridge fan.

The yellow and blue wires here are delivering permanent 12 V according to my multi meter readings. So I assume tapping into those would be fine. One of the blues is thicker so probably delivering more amps? The fan consumes 6watts so I guess the thinner wires are ok.

Am I thinking along the correct lines here?

If it helps it is a Thetford Fridge on a Burstner van

 

[Landy Andy]

Make sure what you connect to provides the power, when you want it. Some will only be when engine running, some might be when hab power on, or permanently live.

 

[pwilmo]

Hiya
Internal fridge fan or external vent fan please?

 

[Jimbohorlicks]

Hiya
Internal fridge fan or external vent fan please?

External fan(s) mounted in the top of the outer grilles
Best to fit a thermostat so it goes off when the temp is low enough
They are cheap off e bay.

 

[Al n Val]

Just had this recommended to me, not used it myself but it looks good with a timer on it as well

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[Richard n Ann]

Look up W1209 digital thermostat. Very good, versatile and cheap on ebay.

W1209 Temperature control Switch

The W1209 is an incredibly low cost yet highly functional thermostat controller. With this module (HCTHER0006) you can intelligently control power to most types of electrical device based on the temperature sensed by the included high accuracy NTC temperature sensor. Although this module has an...

hobbycomponents.com

 

[ctc]

Try the council tip for computer fans, screw or tie wrap them to the grill. Wire across the normally open contacts of a cheap domestic thermostat, fit a small fuse and connect to a 12v supply. Did mine, 4 fans, for the cost of the tie wraps.

 

[VXman]

Hiya
Internal fridge fan or external vent fan please?

External vent

 

[VXman]

Not to be rude but....not asking for suggestions on fans. Done my research, decided and purchased....just asking about how to connect up to 12 volt supply.

 

[VXman]

Make sure what you connect to provides the power, when you want it. Some will only be when engine running, some might be when hab power on, or permanently live.

The multimeter is reading 12 volt when nothing is switched on in the van so I assume this is a permanent supply.

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[Al n Val]

The multimeter is reading 12 volt when nothing is switched on in the van so I assume this is a permanent supply.

I'd say correct

 

[Richard n Ann]

Try the council tip for computer fans, screw or tie wrap them to the grill. Wire across the normally open contacts of a cheap domestic thermostat, fit a small fuse and connect to a 12v supply. Did mine, 4 fans, for the cost of the tie wraps.

Mechanical thermostats are great because they don't use any power amen to that

 

[Silkcut1105]

hi just fit an inline switch so you can use the fan when required ,

 

[Richard n Ann]

hi just fit an inline switch so you can use the fan when required ,

Where's the fun in that? You want it to be automatic so you can sit back and marvel at it. Everytime mine came on I had to give a slow nod with half closed eyes and do with my hand.
Got a bit annoying for Ann after a while mind

 

[tonka]

On my Burstner I tapped into brown (-) and blue (+) for the feed. It's permanent so the thermostat is powered all the time. No issues as it takes next to nowt and just cuts in when needed with temperature.

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[Figaro]

Where's the fun in that? You want it to be automatic so you can sit back and marvel at it. Everytime mine came on I had to give a slow nod with half closed eyes and do with my hand.
Got a bit annoying for Ann after a while mind

I can recognize that smug feeling, but I too find the noise a bit annoying in the quiet of the night. It would be nice to have an over-ride switch without going outside and removing the vent

 

[Richard n Ann]

I can recognize that smug feeling, but I too find the noise a bit annoying in the quiet of the night. It would be nice to have an over-ride switch without going outside and removing the vent

Fit a 30ohm 2w resistor in series with the fan and then a switch in parallel with the resistor if it's a single fan or what I did was fit a series/parallel switch onto 2 fans so I had full or half speed (summer winter setting)