Air Or Heater Blower Always On

[JBSpain]

Model: Citroen C3 1.4 Automatic

Age: 5 years

 

Problem: When you start the car the air or heat blower comes on full blast. The control panel illuminates as it should and it shows the fan speed being increased or decreased etc but it has no effect and the blower continues to operate at full speed with no way to turn it off. I have tried the usual ie remove fuse and disconnect battery but all to no avail.

 

Possible solution: Having search various forums problem does seem to appear quite frequently on Citroen cars but no one seems to come back and say for sure what was the solution and cost etc. The common answer seems to be a faulty fan speed regulator.

 

Question: Any other thoughts on what the problem might be and anyone know where the fan speed regulator is located or how to identify the part etc and most importanntly how I might go about testing before rushing out to buy the part etc.

 

All comments appreciated and when I do get this fault repaired I will update my posting for the benefit of other forum members.

[iannez]

faulty rheo stat. drivers footwell on the side of the heater box. 1x silver torx20 and it pulls out. it has a 4 wire multi plug. dont need to remove anything to get at it. have a bash at it yourself. should take you no more than 5 min.

[JBSpain]

Hi Iannez

 

My car is LHD so I'm working in passenger footwell which is where all the regulators appear to be housed.

 

I thought I was getting somewhere but no joy. I found 3 little motorised regulators but they all function and appear to control various flaps for temperature or air circulation.

 

But I am still struggling to find any unit that regulates fan speed.

 

Any more throught on how to identify or find the part?

[JBSpain]

The part is as Iannez said located on a RHD car in the driver’s footwell on the side (towards the back) of the heater blower box.

 

The part varies depending on whether the car has air conditioning or indeed full climate control. So best to remove and identify the part before buying!

 

Ignore the little motorised units on the side of the heater blower box (about 3) which are closer to the dashboard. They control temperature and open/close directional flow shutters etc. If you’re at those you need to go further back.

 

My car has full climate control so the resister has two plugs which go into green socket holders set into the resister. The part is removed with a torx 20 and then pulls straight out.

 

The Valeo part number for my car was F657165W/M.

You can see this part on www aepdirect com their part number is AEP 509355.

 

The Citroen part number is 6441L2 for the resistor on cars with climate control and for other models I believe 6441Q8 and possibly other number depending on model/make/features etc. Sometimes these parts appear on ebay and you can also see pictures there.

 

It would help if you could cross reference the Valeo part number with the Citroen part number but failing that check images. Also online parts suppliers seem to use their own numbering system and not cross reference to Valeo or Citroen. The Valeo parts are used on other cars (Peugeot/Renault etc) so I guess that’s part of the problem with having a unique numbering system!

 

I bought the replacement part from Citroen for approx GBP50.00. You might find it cheaper on ebay or from some discount online parts supplier.