Citroen C4 Grand Picasso 2014 MK2 - Water ingress into driver's foot well when it rains.

[Elgrande Skyblue]

VF7**************[VIN obfuscated, can be read by forum staff]
Citroen C4 Grand Picasso 2014 MK2.

Hi, do you have any diagrams of the water drainage system, especially in relations to the cabin heater system and Aircon system.

Each morning from last weekend the drivers footwell is collecting copious amounts of water and sometimes it pours onto my accelerator foot when I am progressing up a steep hill, plus there is also a swooshing noise each time I proceed though a sharp left hand bend.

The main fan was behaving sluggishly but has now failed completely and demisting is now impossible due to the constant deluge of water into interior. Do you also have details of the OEM number of the fan and resistor? I have tried searching on line, but cannot find one to fit a RHD vehicle.

Many Thanks.

[PaulC5]

You might have leaves blocking any drain holes on the engine side of the bulkhead.

[Elgrande Skyblue]

Yes suspect blocked drainage. Noticed moss growing in the channels by both roof bars, therefore suspect it is also growing within the drainage lines, but don't understand how the roof and bonnet drainage lines flow into the ventilation and heater circuit to damage the heater motor. I assumed the Aircon and heater would have their own seperate drains.

[RichardW]

On the mk 1 there are drain tubes from the scuttle behind the front wheel arch liners that block up, I expect mk 2 is the same. The fan might come back to life if you dry it out.

Part no for the blower on yours is 98 497 843 80

Note I've tweaked your Vin so it is hidden.

[GiveMeABreak]

Do you also have details of the OEM number of the fan and resistor? I have tried searching on line, but cannot find one to fit a RHD vehicle.

Many Thanks.

(2) Heater Air Puller, part: 9849784380, £414.25
(3) Heater Motor Control Module, part: 9821291880, £185.27

[Elgrande Skyblue]

Many thanks for your kind help.