Heat blowers

Post your Cit/Peu/Ren air conditioning queries or advice.

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Martox
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Heat blowers

Post by Martox » 01 May 2019, 15:53

Hi im a new member just bought a c4 picasso hdi 2lt vtr, when we test drove it the air con was working picked up today the aircon is working but not blowing on hard setting can anyone advice please 2011 model many thanks in advance martin

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Re: Heat blowers

Post by Hell Razor5543 » 01 May 2019, 15:58

Hi, and :welc: to the forum. In order for us to be able to help you with accurate information could you please post your VIN here. It will automatically be obscured by the forum software, but Moderators will be able to read it, and then look up your vehicle on the Citroen systems, so they can see exactly what she had when she rolled out of the factory. They will then be able to give you good advise and information based on that.

Martox
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Re: Heat blowers

Post by Martox » 01 May 2019, 16:01

Vin number is VF7**************[VIN obfuscated, can be read by forum staff] THANKS

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GiveMeABreak
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Re: Heat blowers

Post by GiveMeABreak » 01 May 2019, 16:19

Ok, so you have a C4 Picasso Family Saloon 2.0 HDi 163 PEF (DW10CTED4) Manual gearbox 6.

This model has he single Air Conditioning System. I suspect your blower control module may be on the way out. This one I believe is attached directly to the blower motor, although is available as a separate part.

Your blower control module is item 3 below - you don't have item 11 on your model.
C4 Heater.PNG
What tests have you done though?
If you direct all air distribution towards the middle (fascia front and side vents) and start off at the lowest blower setting and then slowly increase a step at a time what happens from lowest to full speed? Are you getting minimal speed or max and nothing in between?

Martox
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Re: Heat blowers

Post by Martox » 01 May 2019, 16:36

Hi just followed your instructions when car is stationary you get no blowing when vehicle is moving you get minimal blowing , it was working when we test drove it but drivers window wasnt he had to get a new switch on drivers door thanks

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GiveMeABreak
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Re: Heat blowers

Post by GiveMeABreak » 01 May 2019, 17:20

Ok, that's not a really good test, when driving because you are getting the 'ram' effect of air being driven into the vehicle whilst it is in motion.

So if you are not getting anything at all when stationary, then it is likely to be your control module.

The part number is 6441CE. £223.15 inc. VAT from Citroen.
You can get a decent quality one from VEMO (German Made):
https://www.euspares.co.uk/parts/vemo/12250339 for £116 inc. VAT

It's the item in blue shown here:
C4 Blower.PNG
There are cheaper ones from £30+ but there have been many complaints about the real cheap ones simply not working or dead on arrival. - up to you, but the unit is accessed from the driver's side footwell - above the top trim.

I can provide some guide for getting to it if you are going to attempt it your self.

Martox
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Re: Heat blowers

Post by Martox » 04 May 2019, 12:14

Just to let you know aircon works now thanks for all information , another question does my model take add blue if so can i fill up and how do i check level thanks

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GiveMeABreak
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Re: Heat blowers

Post by GiveMeABreak » 04 May 2019, 12:31

No you don't have Adblue - that wasn't available on PSA vehicles until 2013.

You do have a Diesel particulate filter though which requires an additive, which is not the same as Adblue.

Adblue is used in vehicles with SCR (Selective Catalytic Reduction) technology. SCR is used upstream of the DPF (Diesel Particulate Filter) to eliminate 90% the NOx emitted. So the SCR gets rid of about 90% of the NOx by converting the NOx into water and hydrogen, and the DPF eliminates 99.9% of the particulate matter.

A video explaining the process if your interested, but you only have the DPF in your vehicle. You should get a warning when the additive level needs topping up. This will require a competent garage to do by filling the additive reservoir via a tube and resetting the additive counter using a suitable diagnostic tool, if you don't have one yourself. You need to ensure you use the correct additive level too as some of these cannot be mixed.