C4 heater/air con not working

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Justin_Brown
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Re: C4 heater/air con not working

Post by Justin_Brown » 09 Nov 2017, 19:51

Thank you,

I'd appreciate that.
I would rather establish that it is indeed the fuse box before I incur any unnecessary expenses.

Are you suggesting bridging the circled wires?
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Re: C4 heater/air con not working

Post by GiveMeABreak » 09 Nov 2017, 19:54

I've emailed the diagram to you as it is too large to display on the Forum.

PSF1 is the under engine Fuse box. Anything on the diagram with marching ants is optional kit - and won't be there (like the additional blower motor module we discussed earlier).
If you need a hand with the codes use this link to our Wiki, where I put a guide together:
https://frenchcarforum.co.uk/wiki/index ... ring_Codes
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Re: C4 heater/air con not working

Post by petef » 09 Nov 2017, 20:16

Yes, the two wires in your photo were connected with a fused bridge by the auto electrician and heater and air con then worked - but no delay when ignition was switched on. Can't remember the size of fuse - but should be the same as the heater fuse in the BSM, 15 amp??
When I eventually replaced the fusebox I simply removed the fuse and left the bridge in place - for the next time the fusebox fails.......
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Re: C4 heater/air con not working

Post by Justin_Brown » 09 Nov 2017, 20:41

I will use a 40 Amp fuse just to be safe and if it proves to be the fuse box I'll bite the bullet and source a replacement.
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Re: C4 heater/air con not working

Post by Justin_Brown » 10 Nov 2017, 17:19

Hi again,

Am I following instructions correctly?
I unplugged A from B and bridged connection A using a 30 amp fuse. My understanding is that this should have bypassed the fuse box and its relays providing the entire ac/blower set up with current. However all I got was an ABS and ESP fault message
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petef
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Re: C4 heater/air con not working

Post by petef » 10 Nov 2017, 19:22

The auto electrician bridged the two thick input wires - yours seem to be yellow and white? - with a fused wire (of similar diameter). However the plug was still left in the socket. If this does not work then the fault must be further down the line.
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petef
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Re: C4 heater/air con not working

Post by petef » 10 Nov 2017, 19:56

Just to be clear the bridging was done by splicing into the two wires.......
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Re: C4 heater/air con not working

Post by Justin_Brown » 10 Nov 2017, 20:55

Thank you for all your advice and patience. I gave the above a try and all seems to be working again.
I will run the temporary fix until I've sourced a replacement fuse box.
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petef
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Re: C4 heater/air con not working

Post by petef » 10 Nov 2017, 21:39

Good news. My money was on it being the same fault and therefore the same fix....
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