COOLING FANS WIRING DIAGRAM

Submitted: Thursday, May 17, 2012 at 11:10
ThreadID: 95618 Views:7174 Replies:4 FollowUps:23
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Hello everyone out there

Sitting in Lee Point caravan park Darwin after being on road for a week going to Arnhem land.
Fridge not cooling .
Just bought 2 computer fans and have attached to top vent sucking out .
Desperately need a wiring diagram or simple step by step instructions for hooking them up
already blown 2 fuses ....doing something wrong.
have a simple on -off switch on outside of van .
JAYCO FINCH OUTBACK TOYOTA HILUX DUAL CAB 2002
CALLING ALL CARS CALLING ALL CARS
Cheers Glenn
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Reply By: Ross M - Thursday, May 17, 2012 at 12:12

Thursday, May 17, 2012 at 12:12
You are better off to fit the fans inside so they blow cool air from the bottom, up over the rear of the fridge. That way the fans don't get heated.
If at the top there is a distinct possibility of the fans sucking air from anywhere they can and also recirculating hot air through themselves instead of causing good cooling air flow over the heat exchanger on the back of the fridge.

The two fans, are they 12v or 240v computer fans? You can get both types so check what you have bought.

Need to know exactly which fans you have to advise on how to wire them.

If they are 12v and wired with the reds together and the blacks together and fed 12v, there should be no problems encountered.

Reds to +ve, Blacks to -ve on a 12v system.
AnswerID: 486034

Follow Up By: GLENN M2 - Friday, May 18, 2012 at 09:45

Friday, May 18, 2012 at 09:45
Thanks Ross
Back online
The fans are 12 v and I made a classic mistake connecting the fans by connecting the on off switch the wrong way with + one side and - the other instead of inline on the + side and all - to earth.
Have just worked out it is the fridge thermostat not working by bypassing thermostat and going straight to element .
This apparently effects the gas and 12 v either /or.
Will replace thermostat today.
Thinking of buying 2 more fans and switch and placing at the bottom vent as well
Have also read lots on ventilation behind 3 way fridges and distances between back of fridge and caravan wall thanks to all forums on the web.
Thanks all for great help ,diagrams and info to all .
May all traveling the lonely planet have cold fridges.
Going to Maningrida soon .
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Reply By: Hairs & Fysh - Thursday, May 17, 2012 at 13:02

Thursday, May 17, 2012 at 13:02
Hi Glenn,
Is this of any help to you?
Three Way Fridge Ventilation Upgrade
Technical Pages Fridges.
AnswerID: 486037

Follow Up By: Member - Boo Boo (NSW) - Thursday, May 17, 2012 at 13:45

Thursday, May 17, 2012 at 13:45
That's it................... The dream pod diagram is the one I used and it sucks the hot air out very effectively.

Should have clicked onto the link before I did my reply below.

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Follow Up By: Hairs & Fysh - Thursday, May 17, 2012 at 14:27

Thursday, May 17, 2012 at 14:27
I didn't wire in the internal fridge fan, just the external one with the 70 degree thermostat.
I placed the fan below the fins at the back of our old RM360 to blow the heat off them,
seems to work well,
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Follow Up By: Hairs & Fysh - Thursday, May 17, 2012 at 14:27

Thursday, May 17, 2012 at 14:27
I didn't wire in the internal fridge fan, just the external one with the 70 degree thermostat.
I placed the fan below the fins at the back of our old RM360 to blow the heat off them,
seems to work well,
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Follow Up By: GLENN M2 - Friday, May 18, 2012 at 09:47

Friday, May 18, 2012 at 09:47
Thanks H@F

Absolutely spot on information.....much appreciated
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Follow Up By: Hairs & Fysh - Friday, May 18, 2012 at 16:06

Friday, May 18, 2012 at 16:06
Hi Glenn,
I believe it was RockApe who first posted this info awhile back.
I've just kept the links for future reference which has come in handy to share.
Cheers,
Hope you have a good one.
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Follow Up By: Member - bbuzz (NSW) - Friday, May 18, 2012 at 17:07

Friday, May 18, 2012 at 17:07
Good idea to have a resistor placed in line to slow the fans down and help them last longer.
Part No - 5W27RJ from Jaycar.

Mine run off the van battery so they can run while travelling. The van charger takes care of any battery drain (negligible really) when in the park.

Bill
Bill B

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Follow Up By: GLENN M2 - Friday, May 18, 2012 at 21:56

Friday, May 18, 2012 at 21:56
Thanks bbuz
good info..................cheers Glenn
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Follow Up By: Hairs & Fysh - Saturday, May 19, 2012 at 06:54

Saturday, May 19, 2012 at 06:54
Thanks Bill, I'll grab one next time I'm in town off Jaycar.
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Reply By: Member - Bruce C (NSW) - Thursday, May 17, 2012 at 13:12

Thursday, May 17, 2012 at 13:12
Hi Glenn,

As Ross said, make sure the fans are not 240 volt.
If you are satisfied that they are 12 volt then the diagram is as follows.

Image Could Not Be Found

I hooked mine up but thought I was clever using 12 volt connection behind the fridge.
That circuit is only active when connected to the car as it is for running the fridge on 12 volts whilst the car is going. Not a good choice as the fan only worked occassionally.

That is why I have shown supply coming from a permanent source this way the fan will work whenever you want it to.

I also removed the top cover from the front of the fridge (only held on by 2 screws) and fitted the switch in that panel so that it could be turned on from inside the van. I used one of the fancy toggle switches that only require a round hole for mounting.

Cheers, Bruce.
At home and at ease on a track that I know not and
restless and lost on a track that I know. HL.

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AnswerID: 486038

Follow Up By: Member - Boo Boo (NSW) - Thursday, May 17, 2012 at 13:27

Thursday, May 17, 2012 at 13:27
G'day Glenn

I had the same problem and I think it was RockApe that put a diagram on this site about 18 months ago.

The computer fan was attached to the inside of the grill by cable ties and a thermostat attached to the black pipe and a diode in there somewhere to reduce the speed of the fan so it did not burn out. The fan only ran when the thermostat got hot.



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Follow Up By: Member - GeeTee (NT) - Thursday, May 17, 2012 at 13:50

Thursday, May 17, 2012 at 13:50
Hi,

I don't think your wiring diagram is correct. Where does the second fan get it's 12v from ?

GT
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Follow Up By: Member - Bruce C (NSW) - Thursday, May 17, 2012 at 13:51

Thursday, May 17, 2012 at 13:51
Sorry Glenn the diagram was imcomplete.

rectified below

Image Could Not Be Found
At home and at ease on a track that I know not and
restless and lost on a track that I know. HL.

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Follow Up By: Member - Bruce C (NSW) - Thursday, May 17, 2012 at 13:54

Thursday, May 17, 2012 at 13:54
Well I obviously could not fool you Gee Tee.

Just got a bit ahead of myself there on the first one.

At home and at ease on a track that I know not and
restless and lost on a track that I know. HL.

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Follow Up By: Member - GeeTee (NT) - Thursday, May 17, 2012 at 13:55

Thursday, May 17, 2012 at 13:55
Thats better !!!!!

GT
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Follow Up By: Ross M - Thursday, May 17, 2012 at 18:14

Thursday, May 17, 2012 at 18:14
Now the RHS fan is "frack to bunt" according to the wiring polarity.
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Follow Up By: Bushranger1 - Thursday, May 17, 2012 at 19:32

Thursday, May 17, 2012 at 19:32
Looks fine to me.
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Follow Up By: Ross M - Thursday, May 17, 2012 at 20:13

Thursday, May 17, 2012 at 20:13
Look again Bushranger1, if the power inlets are the correct way round then one of the fans is pumping air the other way to the LHS.

See what I mean?
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Follow Up By: Bushranger1 - Thursday, May 17, 2012 at 20:38

Thursday, May 17, 2012 at 20:38
See what you mean about the air direction but the wiring polarity is correct.
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Follow Up By: GLENN M2 - Friday, May 18, 2012 at 09:51

Friday, May 18, 2012 at 09:51
Thanks Bruce

Great simple diagram ................ should print off 2000 and stick to every caravan park loo door in the country.
Much appreciated.
Cheers Glenn
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Follow Up By: GLENN M2 - Friday, May 18, 2012 at 10:00

Friday, May 18, 2012 at 10:00
FAN 2 NEEDS TO BE FLIPPED I BELIEVE

SIMPLE MISTAKE

TO BE SURE TO BE SURE
OR ARE WE ALL TRAVELING IN IRELAND ???????????????????
IN GOOD FAITH

CHEERS
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Follow Up By: pmk03 - Friday, May 18, 2012 at 10:18

Friday, May 18, 2012 at 10:18
For a bit of safety ....
The fuse should be the other side of the switch & as close to the power supply as possible. Otherwise the cable run to the switch is unprotected by the fuse.
PMK
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Follow Up By: Member - Bruce C (NSW) - Friday, May 18, 2012 at 18:17

Friday, May 18, 2012 at 18:17
The diagrams were not intended to cover air flow direction fellows, it is merely a simple schematic to illustrate the wiring layout.

As PMK said, to be scrupulously correct, the fuse could be placed nearer the battery, but a fuse is best place where it is easy to get at.

Bruce.
At home and at ease on a track that I know not and
restless and lost on a track that I know. HL.

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Reply By: Member - bill j (VIC) - Friday, May 18, 2012 at 09:55

Friday, May 18, 2012 at 09:55
Hi Glenn M2

i have a jayco dove outback and have put 2 fans in back of the top vent 1. 240v the other 12v I have a battery under the front seat. have also installed a whale water-pump under van as well so ran a wire from that into a cupboard to a switch for the 12v . The 240 I ran the wire from that to a double PowerPoint where the fridge plugs into. Fan runs when you plug into park power also blocked of the vent that's in the van on top of cupboard at back of fridge.



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AnswerID: 486109

Follow Up By: GLENN M2 - Friday, May 18, 2012 at 15:54

Friday, May 18, 2012 at 15:54
Thanks bill j

Great idea to have a 240v and 12v ............saves on battery power in caravan parks ................I did the water pump as well .
The old plunger wares thin after a while !!!!!
Cheers mate..................
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