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C4 - DS4 Owners :: Forums :: C4 Picasso and Grand Picasso - PRE 2013 only :: C4 Picasso Problems and issues
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Heater Blower randomly on full blast / no control
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Author Post
VeryBigPaws   
Mon Sep 15 2025, 10:46am
Member No: #63270
Joined: Sep 15 2025
Location: Manchester UK
 Hi everyone, newbie here. C4 Grand Picasso 7 seater 2012 1.6 VTR HDI I've just bought this car, 70k miles, fsh, vgc.
However after about a month of everything being fine the heater blower has started coming on intermittently, full blast and pressing the control buttons to tutn it down does nothing. Then it stops just as randomly. Also, sometimes the fan controls don't so anything to increase or decrease the fan speed. Its the model with a manual temp control knob, not the digital one. Any help would be very much appreciated. I'm not very mech minded but willing to have a go if not too involved. Please help, winter is coming and I don't want to be without a working heater system! Thanks
Ap0qalypto   
Tue Sep 16 2025, 06:56pm
Member No: #52161
Joined: Sep 21 2018
Location: Republic of Serbia
 Hello, probably issue is with blower resistor. This is also indicator that blower fan will die soon.
1 User said Thank You to Ap0qalypto for this Post :
 MadGutts (13 Oct 2025 : 20:13)
Nickbrown123   
Mon Oct 13 2025, 09:44am
Member No: #61140
Joined: Sep 03 2023
Location: Zagreb, Croatia
Ap0qalypto wrote ...

Hello, probably issue is with blower resistor. https://kobilabs.com/swept-path/ This is also indicator that blower fan will die soon. https://piktid.com/ai-change-facial-expression/

It's a genuine safety concern heading into winter without reliable heat and demisting!
MadGutts   
Mon Oct 13 2025, 08:14pm
Member No: #63295
Joined: Oct 02 2025
Location: Oxford
 So next question, is where is the fan and resistor? is it worth replaceing both as it sounds like one causes the other to fail?
 

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