Peugeot 306 hdi rad fans - Electrical Forum - Peugeot 306 GTi-6 & Rallye Owners Club

Post #1

Hi there iam having a problem with my rad fans there not cutting in when they should be I only noticed this other day when stack in traffic I ended up turning my engine off before doing any damage I have changed the thermo switch in the side of engine I have checked the fuses in the fuse box and in the engine bay they all seem to be fine when I unplug the switch both fan cut straight on in default mode

Any help would be great full

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Paul

Post #2

Wait so when you pull out a temperature switch then they dont run on full but at normal pace?

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Ex- Phase 3 China GTi-6 T-Reg

Post #3

They both run full speed when I unplug it

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Paul

Post #4

What temp did it get to? they dont cut in full speed until 100c but should be on half speed at 95c

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Where did the road go!

Chris

Post #5

All most 100

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Paul

Post #6

The thing is the fans aren't coming on when they should they only come on if I disconnect the plug

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Paul

Post #7

are they coming on half speed at 95?

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Where did the road go!

Chris

Post #8

No there not coming at all

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Paul

Post #9

Your plug is probably manky where the fan cowling plugs in, behind the rad on the right hand side.

http://www.peugeotlogic.com/workshop/wshtml/electric/ac306/coolfan2/fanop1.htm

I used that guide to diagnose mine. I only had one fan running at full speed as the 12V supply had gone awry on half speed operation which subsequently removed the left fan from the circuit completely in both operations.

Have a search on here for info, the fans can be problematic. The good thing is the HDI doesn't call for them much - i left mine for months before bothering to diagnose it as it never called for them. High speed fans are 105 iirc, literally just before the red line.

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I'm Si btw Tee hee

Night Blue VW Golf GTD
Bianca LBSC Rallye - Track/Road Slag Project Thread
Sparkling Silver Mini Cooper D - Super Dooper Superman

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Post #10

it doesnt have a plug in the rad

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Paul

Post #11

Hence why i said behind the rad..

Open your bonnet stick your head to the right of the peugeot badge and look down at the bottom passenger side corner of the radiator - then move about an inch to the right. Voila.

you got fans, you've got electrickery in there somehow. http://www.306gti6.com/forum/showthread.php?id=149363

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I'm Si btw Tee hee

Night Blue VW Golf GTD
Bianca LBSC Rallye - Track/Road Slag Project Thread
Sparkling Silver Mini Cooper D - Super Dooper Superman

- (The other half's wheels)

Post #12

but what iam saying is if i unplug the temperature sensor the funs will come on fast speed but if i plug temperature sensor back in and let the engine run up to the temperature of 95 the fans dont cut in i have changed the temperature sensor checked the fuses ect

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Paul

Post #13

i think ive been l;ooking at the wrong rad i been looking at the rad cos i have AC as well

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Paul

Post #14

what does this switch do

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Paul

Post #16

i was told to go here http://www.306gti6.com/forum/showthread.php?id=149363 what does this part do

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Paul

Post #17

That's the plug that links the fans to the car ?

Post #18

iam trying to find out why there not cutting in when they should

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Paul

Post #19

Yes we know that and as said you need to check that plug for corrosion ? It's nothing to do with rad it's attached to fan cowling ? You will need to remove the front of the car to get to the fan cowling and that plug Yes

Post #20

ok cool i will check that tomorrow if there corrosion there hows the best way to clean it

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Paul

Post #21

but what i cant understand is if i disconnect the temp sensor the fans will work in default mode but as fast speed

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Paul

Post #22

No idea not even sure you can ? Might have to wire in a replacement plug ?

Just out of interest my hdi barley gets really hot even in traffic ? My fans never kick in as the temp remains really low ? Is yours heating up quickly ?

Post #23

no mine doesnt heart up quick i sat in traffic for an hour and half thats how i noticed the fans didnt work they used to work but they have just stoped working

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Paul

Post #24

Nitehawk10 wrote:

but what i cant understand is if i disconnect the temp sensor the fans will work in default mode but as fast speed

That's because its a s**te system when air con is involved. You will end up changing everything and get no where Yes

been there done that

I assume you aircon is not working ? If so best option is to switch the cooling system wiring to a non air con set up ? This is controlled by a thermostate switch othe rad Thumbs up

Post #25

how do i do that then and i dont see any other switch on the rad only the cowling

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Paul