No heating/Air conditioning - Baffled

This is the Forum for all your Citroen Technical Questions, Problems or Advice.

Moderator: RichardW

User avatar
KennyW
(Donor 2022)
Posts: 2499
Joined: 17 Jan 2006, 21:22
Location: Letham, Fife
My Cars: Current Citroen's
C5 x7 2010
SWMBO C3 2012
Previous Citroen's
Xantia 2.0 90hp estate
Xantia 1.9 TD estate
x 132

Re: No heating/Air conditioning - Baffled

Post by KennyW »

Excellent Marc, I have removed that panel before whilst routing some wiring. Nice to see the access, will report back what happens next.

Kenny
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
User avatar
KennyW
(Donor 2022)
Posts: 2499
Joined: 17 Jan 2006, 21:22
Location: Letham, Fife
My Cars: Current Citroen's
C5 x7 2010
SWMBO C3 2012
Previous Citroen's
Xantia 2.0 90hp estate
Xantia 1.9 TD estate
x 132

Re: No heating/Air conditioning - Baffled

Post by KennyW »

Replaced the heater module no change.

Will have to check for supply to heater blower ?

How easy will it be to check the supply from fuse box in engine bay ?

Citroen electrics are an interesting conundrum :rofl2:

Just looked at where the H.B. is and I wondering how I'm going to get my hands there to remove it ? :rofl2: :rofl2: :rofl2: :rofl2: :rofl2:

This definitely a 5 star rolf.

Kenny
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: No heating/Air conditioning - Baffled

Post by GiveMeABreak »

I put up the specific part for the heter blower removal here Kenny:

viewtopic.php?p=595211#p595211
Please Don't PM Me For Technical Help

Marc
User avatar
KennyW
(Donor 2022)
Posts: 2499
Joined: 17 Jan 2006, 21:22
Location: Letham, Fife
My Cars: Current Citroen's
C5 x7 2010
SWMBO C3 2012
Previous Citroen's
Xantia 2.0 90hp estate
Xantia 1.9 TD estate
x 132

Re: No heating/Air conditioning - Baffled

Post by KennyW »

Thanks Marc,

Once again upside down in the footwell, then twisting myself to bits just have a look at the blower. :rofl2:

or the BOL's method remove dash and check :roll:

Kenny
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
User avatar
KennyW
(Donor 2022)
Posts: 2499
Joined: 17 Jan 2006, 21:22
Location: Letham, Fife
My Cars: Current Citroen's
C5 x7 2010
SWMBO C3 2012
Previous Citroen's
Xantia 2.0 90hp estate
Xantia 1.9 TD estate
x 132

Re: No heating/Air conditioning - Baffled

Post by KennyW »

Looking to confirm part no for the fuse box in the engine bay, I have the following number 96 758 779 80

Kenny
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: No heating/Air conditioning - Baffled

Post by GiveMeABreak »

You need part: 9807028580 Kenny (Item (1)). £232.19 inc. from Citroen.
image_2020-11-20_102856.png
Please Don't PM Me For Technical Help

Marc
User avatar
KennyW
(Donor 2022)
Posts: 2499
Joined: 17 Jan 2006, 21:22
Location: Letham, Fife
My Cars: Current Citroen's
C5 x7 2010
SWMBO C3 2012
Previous Citroen's
Xantia 2.0 90hp estate
Xantia 1.9 TD estate
x 132

Re: No heating/Air conditioning - Baffled

Post by KennyW »

Thanks Marc,

Here's the latest, heating is working but the blower is running at 1 speed only. At least it's clearing the windscreen.

Kenny
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: No heating/Air conditioning - Baffled

Post by GiveMeABreak »

Dare I ask what brand / where you got the heater blower control module from Kenny? The fact that it is operating at suggests power, so I would still be suspecting hte blower control unit - these have been know to arrive dead on arrival - and quality of parts is extremely variable, with some (notably from ECP) being the worst.
Please Don't PM Me For Technical Help

Marc
User avatar
KennyW
(Donor 2022)
Posts: 2499
Joined: 17 Jan 2006, 21:22
Location: Letham, Fife
My Cars: Current Citroen's
C5 x7 2010
SWMBO C3 2012
Previous Citroen's
Xantia 2.0 90hp estate
Xantia 1.9 TD estate
x 132

Re: No heating/Air conditioning - Baffled

Post by KennyW »

It's made in China, with no makers name on the box bought off ebay.

Any recommendations.

Kenny
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: No heating/Air conditioning - Baffled

Post by GiveMeABreak »

Yes Hella - they are not the cheapest though, but are OEM quality Kenny.
Please Don't PM Me For Technical Help

Marc
User avatar
KennyW
(Donor 2022)
Posts: 2499
Joined: 17 Jan 2006, 21:22
Location: Letham, Fife
My Cars: Current Citroen's
C5 x7 2010
SWMBO C3 2012
Previous Citroen's
Xantia 2.0 90hp estate
Xantia 1.9 TD estate
x 132

Re: No heating/Air conditioning - Baffled

Post by KennyW »

Thanks Marc,
I couldn't read the name properly but that's what came off. I had a look inside and it is a small circuit board inside with lots of very small electronics, nothing obviously wrong.

See Pics


Kenny
IMG_0099.JPG
IMG_0100.JPG
IMG_0101.JPG
IMG_0102.JPG
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
User avatar
KennyW
(Donor 2022)
Posts: 2499
Joined: 17 Jan 2006, 21:22
Location: Letham, Fife
My Cars: Current Citroen's
C5 x7 2010
SWMBO C3 2012
Previous Citroen's
Xantia 2.0 90hp estate
Xantia 1.9 TD estate
x 132

Re: No heating/Air conditioning - Baffled

Post by KennyW »

Well I got hold of a 2nd hand fuse box and fitted same no difference, as the blower is working 1 setting does this imply the air blower is working correctly and the problem is with the module.

I will find out another module here ready to fit.

Kenny
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
admiral51
Donor 2023
Posts: 2625
Joined: 24 May 2007, 10:11
Location: poole dorset uk
Lexia Available: Yes
My Cars: C5 X7 2009 2.0 HDI VF7**************[VIN obfuscated, can be read by forum staff]
C4 2010 2.0 HDi Exclusive VF7**************[VIN obfuscated, can be read by forum staff]
x 378

Re: No heating/Air conditioning - Baffled

Post by admiral51 »

I thought i had replied earlier but seems i pressed wrong button :(

Somewhere deep in the old grey matter i seem to recall i had a similar issue with no blower but everything showing lit up on the old Devil Car after it had been sat for a good few weeks.
I did not change the control module as i just bridged the plug to give full power on start up to kick start the blower itself.
From memory the module increases voltage ( power ) to the blower and the blower motor itself can become sticky and only operate on slow or not at all.
By bridging the plug to full power it can kick start the blower and once done it can behave as normal ?

Probably wrong but just my grey matter kicking me.

Colin

*****EDIT*****
I have done a bit of digging and found My Blower Thread . Maybe of some help or not
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: No heating/Air conditioning - Baffled

Post by GiveMeABreak »

I'm not sure if this will help at all as if you are getting at least some speed then at least a signal is getting through. If there are no fault codes being picked up with the Climate ECU then it won't be in backup mode. The original Blower Control Motor is made by BEHR.
blower motor graph A.PNG
"a" Control voltage.
"b" Time.
"A" Period n° 1.
"B" Period n° 2.
The cyclic ratio is equal to : Period n° 1 divided by period n° 1 plus period n° 2 (Ratio of approximately 10 % in this example ).
blower motor graph B.PNG
"a" Control voltage.
"b" Time.
"A" Period n° 1.
"B" Period n° 2.
The cyclic ratio is equal to : Period n° 1 divided by period n° 1 plus period n° 2 (Ratio of approximately 50 % in this example ).
image_2020-11-25_181340.png
"c" Average air blower motor control voltage.
"d" Reference value received by the digital air blower control module.

The Blower motor is the OCR type and the control voltage works on a scale of 0 to 14.
The value of the cyclic ratio of the control signal makes it possible to define the power requested by the vehicle’s passengers.
image_2020-11-25_182358.png
Allocation of the channels of the black 4 -way connector
Channel No.Designation
1Earth: Digital air blower control module
2Air blower motor control
3Earth: Air blower motor
4Digital control
Please Don't PM Me For Technical Help

Marc
User avatar
KennyW
(Donor 2022)
Posts: 2499
Joined: 17 Jan 2006, 21:22
Location: Letham, Fife
My Cars: Current Citroen's
C5 x7 2010
SWMBO C3 2012
Previous Citroen's
Xantia 2.0 90hp estate
Xantia 1.9 TD estate
x 132

Re: No heating/Air conditioning - Baffled

Post by KennyW »

Thanks Marc and Admiral51,

I checked again with Diagbox and got a fault code for Airblower and on expanding code it stated intermittent fault with blower. Can't remember complete code but it was either F70** or F72**.

But I was going to remove blower and put 12V direct from battery to see if it would work.

I'm going to read and digest your info Marc to understand how the module works.

Will update tomorrow.

Kenny
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
Post Reply