C4 GP blower fault

[Arnellc18]

Currently baffled by a fault on my C4 Grand Picasso. The blower controls light up as expected but the blower doesn’t run. All fuses seem okay, ive had the fan running on a bench from a battery so I know the fan is good. Have voltage checked the fan connector but I have no power there

Read elsewhere there’s a relay in the engine fuse box that could be at fault, replaced the fuse box but fault is still the same. Has anyone got any previous with a similar blower fault (they seem common) or a wiring diagram so I can chase the power back to the supply

[GiveMeABreak]

It's likely to be the blower motor control module. These are a common failure. When they go, and because the modules are designed to slowly spin up the fan gradually, they don't have enough welly to get the motor going from a low speed. Replacing this is generally the answer.

There are plenty of recent posts under the Citroen Forum on this for the C4 Picasso - but there are different models and options so would need the VIN to see which system you have.

[Arnellc18]

Hi, thanks for your reply, my vin is VF7**************[VIN obfuscated, can be read by forum staff].

I’ll have a look at that module as well

[GiveMeABreak]

On your vehicle which is the older version you have ‘simple air conditioning’. The module is a half moon shape and may be separate or integrated onto the blower motor itself.

This one , but don’t buy the cheap ones off eBay, they are pretty much useless. Stick to a genuine one if you want years of use. If this is your original it would have done 9 years duty cycle already.

[Arnellc18]

Thanks, I’ll give that a go