alexjfisher

Radiator fan? I've recently discovered they can be quite expensive. :(

Having fiddled around with the old fan for long enough, I decided I was 95% sure it was knackered. New fan (£400=ouch) arrived at the start of last week, and I fitted it yesterday. Aircon now works and I guess I won't be overheating when stuck in traffic this summer. :) Thanks everybody for your help. Alex

Some progress made. Relay box doesn't contain any other relays, just the maroon one my garage already tried replacing and the wiring *looks* fine. But, I was able to remove the fan from the car. It's got two connectors, each with two wires. The larger connector I assume is power and the smaller one speed of rotation sensor maybe?? Putting 12V across the two terminals in the larger connector, doesn't do anything, so I guess it's the fan itself that is knackered? Or is the smaller connector for controlling some relay inside the fan itself? I've put out a request on findapart and am waiting with fingers crossed.

Thanks! I've enlisted the help of a friend and we're going to have another go at fixing it this weekend. Is taking the bumper off an X7 model straightforward? I've got a service documentation CD off ebay, so I'm sure instructions are in there somewhere but there's probably stuff they don't say too. Do you know the part numbers for the relays and/or wiring that might need to be replaced? I can't seem to find them in the service docs. Many thanks, Alex

Still no joy :( I tried some DIY investigations at the weekend, but failed miserably to even get the engine under tray off before it started tipping it down. I think I removed all the screws/bolts, but it just didn't want to come out. Afraid of breaking anything and with the weather/light deteriorating, I gave in. As my MOT was due, I had my local independent mechanic have a look. He replaced the maroon relay, but it still doesn't work. He's not prepared to spend any more time on it has he says as far as he's concerned it could be anything (wiring, BSI, relays, fuses etc). Which is fair enough, considering the time he's already spent without charging me. Hi coastline taxis! Are you saying that there are relays other than the maroon one I replaced? Peering in through the bonnet release catch hole, I can possibly seem some sort of black oblong box mounted vertically and to the right of the fan. Is it in here you think the problem might be? If so, is it something that can be repaired? If I've got to replace something, is it available separately, or does it come with the replacement fan part number? Many thanks, Alex

I got up to 108°C as read from the Lexia (I'm guessing that this isn't above boiling point as it's pressurised) and also did the high speed fan actuator test. Right now, I'm less concerned about the aircon and more about having no cooling (although I'm hoping fixing the cooling fan will also get the air con working again). I've got a 500 mile round trip planned for next weekend... Another hidden fuse box! Thanks, I'll have a look for that. I'll see if I can get at the fan tomorrow and apply 12V directly. Looking at the Citroen service manuals (£10 from ebay :) ), getting to the fan doesn't seem *too* tricky, but I'm a total novice when it comes to servicing/fixing cars. I've recently thought I should try and have a go a bit more though. I spent over £1000 after an injector developed a fault a few months ago :( It's interesting and encouraging you say there is an issue with the relays. Looking at the exploded diagrams, I can see that there is a replacement part (RP 6546 XF) that replaces the original (6545 N5). Fingers crossed, it's the relay. A bit of googling for the cost of the fan and so far I've seen the figure £400 :( http://uk.picclick.com/PEUGEOT-407-CITROEN-C5-C6-COOLING-RADIATOR-FAN-370795588764.html The relay, on the other hand, is *much* cheaper. http://www.citroen-accessories.com/home/87737-rp-6545-xf.html I'm now fully equipped with a Lexia and the Citroen documentation (some of it seems quite good, some of it is useless), now I just need a bit more confidence. It's nice to know there are people who might be able to help out. I'm in Frome, Somerset. Thanks, Alex

We checked all the fuses, and we can hear the compressor clutch activating when manually commanded from the snap on. Testing the cooling fan is a good idea. Thanks. The only problem being I don't own the snap on and I think my mechanic is fed up of seeing me! (my C5 spent a combined total of two months in the garage at the start of the year after an injector failed...). I think I'll invest in the Lexia. If I don't get much use out of it, I'll probably be able to sell it on. Testing the cooling fan was certainly a good idea! Forget low speed cooling fan. High speed doesn't work either! I bought the Lexia and the fault code, IIRC, is 'fan high speed control'. As well as the fault code, I went for a blast around the bypass and then parked up with the engine running. The fan never came on. So, it could be the fan itself (expensive?), or the fan relay (cheap?). Any thoughts on how best to diagnose? All I've figured out so far, is the maxi fuse hasn't blown (took a while to find though!), and the fan hasn't seized (it spins nice and freely). Thanks, Alex

We checked all the fuses, and we can hear the compressor clutch activating when manually commanded from the snap on. Testing the cooling fan is a good idea. Thanks. The only problem being I don't own the snap on and I think my mechanic is fed up of seeing me! (my C5 spent a combined total of two months in the garage at the start of the year after an injector failed...). I think I'll invest in the Lexia. If I don't get much use out of it, I'll probably be able to sell it on. Forgot to say, yes, mine does have the dual climate control system fitted. Thanks again for your help.

We checked all the fuses, and we can hear the compressor clutch activating when manually commanded from the snap on. Testing the cooling fan is a good idea. Thanks. The only problem being I don't own the snap on and I think my mechanic is fed up of seeing me! (my C5 spent a combined total of two months in the garage at the start of the year after an injector failed...). I think I'll invest in the Lexia. If I don't get much use out of it, I'll probably be able to sell it on.

It was an almost constant 158 degree reading (flipped between 158 and 157.5 IIRC) and was the same whether the engine was running or not. But, since it wasn't a citroen tool being used, perhaps it is just a red herring. I might buy a Lexia and see if it shows the same value.

Thanks David Do you know how much space it takes to install the software. Last week I installed some service documentation on an old laptop and it's left me with only around 1GB of space left (the service manuals took up over 25GB!)

Thanks Paul. I agree, if the car really thought the outside air temperature was 70°C that'd be a pretty good reason to not engage the aircon (I doubt the condenser would actual condense anything at that temperature!) But, most of my research so far suggests the car should be using the standard wing mirror sensor (that feeds the satnav display and is reading correctly) to determine the outside temperature. If there is a separate sensor, does anybody know where it might be? With regards to Lexias, are they worth the £100 they seem to be going for on ebay? Thanks again, Alex

Hi I'm having problems with my C5's (58 plate 2.0 HDI tourer) aircon. I took it to be serviced a couple of weeks ago, and the garage was unable to get it going. It's got a full charge of coolant, but the compressor clutch refuses to engage. I spent about an hour with my mechanic trying to find the fault, but we didn't get very far. He suggested I might do some research online, so here I am! :) We hooked it up to his 'snap-on' diagnostics machine and were able to actuate the compressor clutch manually (but only when the engine wasn't running). There was one sensor value that looked way off and could be to blame. IIRC it was the 'exterior air temperature' value that was reading 158 degrees Fahrenheit. Does the car have a second external air temperature sensor just for the aircon? (because the outside temperature as displayed on the satnav is fine). I bought a citroen service manual off ebay and have been trying to study the exploded diagrams, but it's not at all obvious. Many thanks for your help, Alex