or Login >>         
C4 Insurance | Tutorials | Quick Facts | Buying Used C4 | Re Call Info | Offers | Service Reviews | Downloads | Error Codes | Warranty?
Premier Membership * Great Discounts + * Personal Photo Gallery + * = Great Value [read more....]
C4 - DS4 Owners :: Forums :: C4 Picasso and Grand Picasso - PRE 2013 only :: C4 Picasso Problems and issues
<< Previous thread | Next thread >>

Cooling fan not working
Home   Forum Rules    Forum Help  Conversion Tools
   
Please Register to enjoy additional Member Benefits
Top Thanked Forum Posts: Today | Week | Month | Year | All time | Most Thanks Given: To member | By user
Author Post
demogorgan   
Sat Apr 05 2025, 04:31pm
Member No: #56030
Joined: May 07 2020
Location: Midlands
 Hi,

Not having much luck lately haha

The radiator cooling fan is not coming on nor is the aircon usually you would here the compressor click on but nothing, I have changed the temp sensor and the relay by the rad as I got error messages for high and low speed - car flashes temp warning if sat in traffic for too long, so it is deffiently not working - the bottom pipe to the rad gets hot but the top one stays cold?
The fan is not seized but can't test it more currently as my Diagbox cable also decided to die so currently waiting for a new one to be delivered.
Any ideas on what else it could be?
Once the cable arrives I will do more tests but curious if anyone else has had this or have any ideas on what could be wrong ?

Thanks in advance
Demo
Ap0qalypto   
Sun Apr 06 2025, 10:23am
Member No: #52161
Joined: Sep 21 2018
Location: Republic of Serbia
 On the fan there is relay, check that as well. Also check fuses
demogorgan   
Mon Apr 07 2025, 07:37pm
Member No: #56030
Joined: May 07 2020
Location: Midlands
 Hi,

I changed the relay - fuses i believe I checked it, F14 from what I can see online, any others I have missed perhaps ?

Regards
Demo
Cityblue   
Thu Jul 10 2025, 08:11pm
Member No: #63161
Joined: Jul 10 2025
Location: Manchester
 I have a similar issue. Ive got 2018 1.6 diesel picasso. The fan works with the aircon but doesnt cpme on to cool the engine. Im assuming it might be the temperature sensor or resistor. To my enternal shame i cant find the temperature sensor. Am i right int hinking the issue is with 1 of these 2 things and where the heck os the tmeperarure sensor loc
ated
demogorgan   
Sun Jul 13 2025, 08:26am
Member No: #56030
Joined: May 07 2020
Location: Midlands
 Hoping someone can help me as this is driving me crackers

Car has been parked up and life got in the way!

On Diagbox I can't activate the fan manually, it says there is a fault open circuit.
I have changed the resistor pack at the front as that had corroded, I have changed the radiator fan itself, i have changed the relay and the coolant temp sensor but still nothing - I have checked every fuse and no issues there.
I had a mobile mechanic come out and they said it was the resistor pack so changed that again and still nothing.

Have you got any ideas on what could be the issue?.

Thanks In advance
Demo
 

Jump:     Back to top

User Colour Key:
Head Administrator, Administrator, Forum Moderator, Forum Moderator, Premier Member, Technical Expert, New C4 and DS4 Forum Moderators, Member