Some do have regulators there are a few out there with resistor packs. But they are both located in the o/s foot well mounted on the side of the heater box at the bottom. Held in with 2 screws.
Paul Haworth
May 2008
C5 Doesn't have one. It is a electronic transistor regulator.
Knut Haukalid
May 2008
I can answer this question...
where can I find the heat resistor for my citroen c5?
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