Interior heater fan not working

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My Name: Ivor Wrongun

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Posts: 7
Joined: Thu Nov 15, 2012 9:58 am

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i will give it a try, thank you once again.... I will let you know how I get on :?
My Name: Ivor Wrongun

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Posts: 7
Joined: Thu Nov 15, 2012 9:58 am

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I have checked for voltage on B4 using the back probing technique (thanks for tip)....no joy.

It must be the relay?! can you help me find it please....
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My Name: C3CAR

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Posts: 2707
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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C3CAR wrote:Then I would check the voltage on B6 on the control panel. This could be considered the 'input', if the blower motor plug is the 'output'. No input = No output.
B4 is the output to the blower motor, testing this can save changing the motor unnecessarily. (the the output of the control panel and should give +v (DC) when the panel is set to 'blow' and all other inputs are good.

B6 is the input power to the control panel that comes from the relay. You need +12v (DC) here to show the relay is good.


Then there is a 'good to go' signal from the BSI (A6), an all important earth on A4, and the 4 wires to the to the resistor pack (which you have said has already been changed). You can see all these in the haynes manual.

Ivor Wrongun wrote:the relay?! can you help me find it please....
The engine bay fuse box can be seen in this picture
Citroen C3 fuse box under bonnet location
Citroen C3 fuse box under bonnet location
found on Citroen C3 Fuse Box Locations topic
My Name: matk

Contributor
Posts: 15
Joined: Sun May 17, 2015 10:54 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 124000
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)

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Hi Everybody…

Similar issue I think……

Just bought a 2003 C3 Exclusive, with digital climate control. I live in France so it's a LHD model….

The climate control was working fine, although I did notice on first try after picking up the car, that after commanding max fan speed as a test, it didn't work first time. Then it suddenly kicked in, so I assumed everything was fine, and it all appeared to work for a day or so.

However today, there is now nothing being blown out of the vents by the climate control on any settings. When I cycle through various fan speeds, temperatures, and vent directions, the control panel responds, I can hear the distribution flaps moving on command behind the dash, the fan speed display changes as I command different temperatures, just nothing actually blows out of the vents.

So far I have checked the 40 amp fuse (F8 I think) in the engine bay fuse box, and it looks fine. I'm about to follow the steps in this thread, but are there any differences for digital auto climate control I should be aware of?

Anybody any other ideas?

Edit…….

Just caught up with this thread also: Citroen C3 Heater blower failure

I'll change the resistor pack I think, LHD so no pedals in the way lol!
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My Name: C3CAR

Guru
Posts: 2707
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 186 times
Been thanked: 101 times

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matk wrote:Edit…….

Just caught up with this thread also:

citroen-c3-questions/heater-blower-failure-t516.html

I'll change the resistor pack I think, LHD so no pedals in the way lol!
Hi matk

Did you get anywhere with finding the right resistor pack? There are several listed for the C3 models.
My Name: matk

Contributor
Posts: 15
Joined: Sun May 17, 2015 10:54 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 124000
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)

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I hope so, bought one off eBay and it's in the mail to me. I'll check in here when it arrives and let you know if it solves the issue. Reading both threads on here though I'm confident! We'll see……...
My Name: matk

Contributor
Posts: 15
Joined: Sun May 17, 2015 10:54 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 124000
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)

Post

Postman delivered 9.30am, resistor pack fully installed 9.45am, easy job (well on LHD lol).

All now working!

Delighted, and couldn't have solved so easily without the info on the previous threads, so many thanks.
User avatar
My Name: C3CAR

Guru
Posts: 2707
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 186 times
Been thanked: 101 times

Post

matk wrote:Postman delivered 9.30am, resistor pack fully installed 9.45am, easy job (well on LHD lol).

All now working!

Delighted, and couldn't have solved so easily without the info on the previous threads, so many thanks.
Thanks for the update, RHD is not a difficult job either if you know where to look :)

C3 RHD heater resistor pack location

Citroen C3 heater blower resistor pack location
Citroen C3 heater blower resistor pack location
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