Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Air Conditioning only works when van is in motion
#11
I have taken out both the relay's that I can see in the location mentioned and checked them on the bench with a meter and a 12v supply and both relay's are behaving as I would expect. They also visually look in very good condition so there was nothing about them which I originally saw to give me any cause for concern. I also noticed there were two 40A fuses in the same unit so I checked those and they are fine too. And I also put my meter on the common feed to the unit which read 12V so as far as I can see, it's all good there.

Additionally turning the aircon ON the big fan in front of the radiator does not spin. In fact at no point at all am I seeing that fan spin, although I let the engine heat up it didn't get hot enough even stationary to trigger the fan to come on, it's probably just not hot enough, but the main point here is that the fan is not spinning when I press the aircon button ON.

Does this point to a fault with the fan? I'm now wondering if there are any other components to check in this circuit, or if indeed the fan is shot. Please can you advise? Not sure if there's a circuit diagram available on the forum I could follow for this to check anything else?

Thanks again,
Gav
Reply
#12
(13-09-2021, 08:07 PM)Gavvan Wrote:  I have taken out both the relay's that I can see in the location mentioned and checked them on the bench with a meter and a 12v supply and both relay's are behaving as I would expect. They also visually look in very good condition so there was nothing about them which I originally saw to give me any cause for concern. I also noticed there were two 40A fuses in the same unit so I checked those and they are fine too. And I also put my meter on the common feed to the unit which read 12V so as far as I can see, it's all good there.

Additionally turning the aircon ON the big fan in front of the radiator does not spin. In fact at no point at all am I seeing that fan spin, although I let the engine heat up it didn't get hot enough even stationary to trigger the fan to come on, it's probably just not hot enough, but the main point here is that the fan is not spinning when I press the aircon button ON.

Does this point to a fault with the fan? I'm now wondering if there are any other components to check in this circuit, or if indeed the fan is shot. Please can you advise? Not sure if there's a circuit diagram available on the forum I could follow for this to check anything else?

Thanks again,
Gav

The fan is nothing to do with the aircon it is engine cooling. The AC compressor is what you should hear kicking in and out when the aircon is running and if it works you will definitely hear it with your head under the bonnet. We've had our M59 for years now and the front fan has only run a couple of times in all. The aircon works fine without the radiator fan running.
So where does this bit go then ?
Reply
#13
Just a thought........ I guess that the AC compressor is controlled by a thermostat which cuts the compressor when the temperature is low enough. When sitting stationary this appears to happen quickly, but on the move there may be enough 'warming' air passing to keep the compressor running for longer periods.  
Might be worth checking that the heater controls are actually set correctly /working/connected and diverting air correctly- with the (heater) fan on full blast it and engine running at 2000 rpm it should mimic the (cooling) effect of driving along?  
Lucky that winter is nearly here!
Reply
#14
Might be worthwhile a look at this post on the French car forum

https://www.frenchcarforum.co.uk/forum/v...25#p693125

Changed the cooling fan and got a/c back
2010 B9 red XTR w a v. 
2001 1.9d DW8B white  Berlingo  
2005 2.l green Berlingo
2001 1.9d DW8B white  Berlingo 
berlingo 1.4 red multispace
1993 xud 1.9 red partner
Reply
#15
(14-09-2021, 08:10 AM)ffrenchie Wrote:  The fan is nothing to do with the aircon it is engine cooling. The AC compressor is what you should hear kicking in and out when the aircon is running and if it works you will definitely hear it with your head under the bonnet. We've had our M59 for years now and the front fan has only run a couple of times in all. The aircon works fine without the radiator fan running.

The fan operates according to the coolant temperature sensor and according to the gas pressure in the aircon. As long as the aircon is running, the fan is running at low speed, it is quiet and inaudible. Maybe you did not hear the fan running?
Reply
#16
(14-09-2021, 02:47 PM)Buki Wrote:  
(14-09-2021, 08:10 AM)ffrenchie Wrote:  The fan is nothing to do with the aircon it is engine cooling. The AC compressor is what you should hear kicking in and out when the aircon is running and if it works you will definitely hear it with your head under the bonnet. We've had our M59 for years now and the front fan has only run a couple of times in all. The aircon works fine without the radiator fan running.

The fan operates according to the coolant temperature sensor and according to the gas pressure in the aircon. As long as the aircon is running, the fan is running at low speed, it is quiet and inaudible. Maybe you did not hear the fan running?

That must be the case.
So where does this bit go then ?
Reply
#17
Solved!!

Ok first off, thanks to everyone who replied on this giving me advice, it's very much appreciated and it absolutely helped in finding the problem, plus we learnt a lot too fixing it!

The fan should indeed spin at a slow speed when the aircon is switched ON and it does run continuously. So we bought a replacement resistor unit which does indeed fit on the front of the fan just to the left of it as you look at the front of the van; this is only accessible after taking the entire front bumper off. The replacement resistor from Citroen comes in a different sealed housing, looks completely different and has an adaptor harness you get with it which allows it to connect to the existing wiring loom as the physical port is different. We ordered this from Citroen (against the VIN of the van, so clearly they've made a design tweak to this since the van was built!) and the part is about £70. The old one which came out didn't look too bad, but we could not be sure of it's condition. The other thing we spotted is that the 50 Amp fuse (labelled 'MF1') in the engine bay fuse box feeding power to the fan had blown. This fuse is on a tray which is beneath the main tray, so you won't see it immediately by lifting the main tray lid, you have to get to the tray beneath it by lifting out the top tray that you see and then check it. Now it may very well be that the blown fuse was the cause of the problem in the first place, but since by that point the fan resistor had already been purchased and was sunk money, it made sense to stay with replacing it anyway. The old resistor may have even played a part in the fuse blowing in the first place, but at least replacing it there and then was one less thing to worry about if indeed it was that.

Once we started the engine, pressing the aircon button to ON now starts the aircon fine and it continuously runs. At the same time, the main fan on the front radiator IMMEDIATELY starts spinning and does so continuously at slow speed whilst the aircon is ON. Another thing to note is that the aircon will run at all speed settings within the cabin 1-4 on the dial. I think I read somewhere either on this forum or on a google search that the aircon won't run on speed setting 1, but that's just not true, the aircon now runs on all speed settings selected in the cabin.

Thanks again to all who posted replies, all very helpful! Hopefully this post and its solution helps others out there with the same issue.

Gav

(I suppose one additional good thing that's come out of this is that the fan in the van does actually work now, because putting the whole aircon issue to one side for a moment, the fan couldn't have been running at all even when the engine started to overheat. I've probably just been incredibly lucky that the van engine hasn't been sat in traffic on a hot day long enough that it's needed it! At least it's protected against that too now!)
[-] The following 2 users say Thank You to Gavvan for this post:
  • brodfather11, Buki
Reply
#18
The fan should speen at low speed as long as the aircon is running, even when the inner dial setting is 1. When the inner dial at 3 or 4 + hot weather, the fan will sometimes go to high speed.


Regarding the fan resistor-
The resistor has a lid that protects it from water, etc. The old lid does not fit against the new resistor. Did you also buy a new lid?
Reply
#19
(16-09-2021, 04:34 PM)Buki Wrote:  The fan should speen at low speed as long as the aircon is running, even when the inner dial setting is 1.  When the inner dial at 3 or 4 + hot weather, the fan will sometimes go to high speed.


Regarding the fan resistor-
The resistor has a lid that protects it from water, etc.  The old lid does not fit against the new resistor.  Did you also buy a new lid?

Thanks for your reply - that's a good point regarding the old lid, I notice it didn't fit on the new resistor... I did not buy a new lid and didn't even know one existed, the parts chap at Citroen never mentioned that part, but then I guess why would he! I'll call them back in the morning and ask about it, I did notice the new resistor was sealed and thought that maybe that was enough for the new design, but it's interesting there's a new lid to buy also! 

Thanks,
Gav
Reply
#20
You can see the new lid compared to the old.



       
Reply


Forum Jump:


Users browsing this thread: 1 Guest(s)
[-]
Welcome
You have to register before you can post on our site.

Username:
  

Password:
  




[-]
Search
(Advanced Search)

[-]
Latest Threads
UREA & engine light, Citroen goodwill claim.
Last Post: Mallorca-ingo
Yesterday 09:17 PM
» Replies: 1
» Views: 343
Fixing plastic trim
Last Post: notsofast
Yesterday 07:12 PM
» Replies: 4
» Views: 169
What's yours called?
Last Post: Mike
Yesterday 07:12 PM
» Replies: 9
» Views: 1130
Adding a passenger airbag on 2017 Van
Last Post: spotter300
Yesterday 06:44 PM
» Replies: 0
» Views: 121
Paint Peeling - Delamination
Last Post: oilyrag
Yesterday 04:16 PM
» Replies: 25
» Views: 5578
Power Steering pump 05 Berlingo Multispace
Last Post: geoff
Yesterday 01:03 PM
» Replies: 2
» Views: 374
Berlingo Pop Top Roof
Last Post: vampirequeen
Yesterday 10:08 AM
» Replies: 3
» Views: 1895
Rear washer/ wiper randomly turning on
Last Post: ed34
Yesterday 08:59 AM
» Replies: 5
» Views: 957
Springs
Last Post: RattyCortina
Yesterday 05:36 AM
» Replies: 1
» Views: 374
Berlingo DPF ISSUES. I’m out of ideas
Last Post: Stevie C
27-09-2021 07:48 PM
» Replies: 13
» Views: 2240

[-]
Recent Visitors
Locations of visitors to this page

[-]
Hosting by

QuickHostUK