Description
Fan regulator for CITROEN PEUGEOT cars
Fits CITROEN C3 II, C4, C5 III, C6, DS3 PEUGEOT 407
Fully functional, tested
Part description
This fan regulator is used to control the speed of the fan (typically the cooling fan or the heating/air conditioning fan depending on the specific design). Thanks to a properly functioning regulator, the fan runs smoothly, at appropriate speeds and without interruptions.
The part is intended for Citroën/Peugeot cars and, according to the documents, it fits the mentioned models. Suitable for mechanics and home repairs – especially when looking for a replacement via product number 6441S7 or one of the other markings on the part.
Technical information
- Manufacturer: Stellantis
- Model: CITROEN C3 II, C4, C5 III, C6, DS3; PEUGEOT 407
- Other numbers: 9017094, F8840002, 5HL 008 941-03
Product codes
- Product codes: 6441S7, 9017094, F8840002, 5HL 008 941-03
Installation recommendations
Generally/typically the fan regulator is an electrical part and the exact procedure may vary depending on the specific version of the fan and the equipment of the car. Below is a safe, practical procedure for replacing this type of part.
1) Before assembly (checks)
- Compare the part numbers (min. 6441S7 and any alternative designations) with the old piece.
- Check the compatibility of the connectors (shape, number of pins, securing) and the overall condition of the plastics.
- Inspect the pins in the connector: they must not be bent, oxidized or loose.
- Check the part for signs of overheating (brown plastic, odor, deformation).
2) Necessary tools and materials (in general)
- Basic set of ratchets/bits and screwdrivers
- Plastic pry bar for removing covers (as needed)
- Contact cleaner for electrical connectors
- Protective gloves, flashlight
3) Step-by-step assembly procedure
- Turn off the ignition and wait for the system to “sleep” (typically a few minutes for modern cars).
- Disconnect the battery (minus pole) to avoid short circuit or damage to the electrical part.
- Get access to the regulator (remove the necessary covers/lines according to the specific car).
- Locate the regulator and check that the wiring is not frayed or burned.
- Disconnect the electrical connector – release the connector fuse gently, without prying with force.
- Unfasten the regulator and remove the part.
- Clean the contact surfaces and the connector (with contact cleaner), let it air out.
- Install the new (used) regulator in the same position as the original piece.
- Tighten the fasteners appropriately so that the part sits firmly and is not under tension.
- Connect the connector and verify that it clicks and holds without play.
- Reinstall all removed covers/parts.
- Connect the battery and perform a basic function check.
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4) Post-assembly checks and functional test verification
- Verify that the fan responds to a change in demand (e.g. change in fan speed / switching according to temperature – according to equipment).
- Check that the connectors and wiring are not overheating.
- Listen to see if the fan is running intermittently or making unusual noises.
- After a short ride, visually check the fastening and wiring again.
5) The most common assembly mistakes + how to avoid them
- Battery not disconnected → risk of short circuit/damage; always disconnect the negative pole.
- Swap by appearance without checking codes → always compare 6441S7 and other numbers.
- Not clicked connector → can cause fan outages; after connecting, pull the connector slightly.
- Ignoring pin oxidation → clean connector, check pins and pressure.
- Pinched wiring when mounting the covers → route the harness as factory and secure it.
Reasons why the part is damaged
- Thermal stress and gradual aging of electronics (typical for fan control).
- Bad contacts in the connector (oxidation, loose pins) leading to transient resistance and heating.
- Moisture and corrosion in the connector area or around the fan.
- Fan overload (e.g. stuck/hardened fan, dirt) – the controller then works outside normal conditions.
- Damaged cabling (abrasion, short circuit) causing blackouts or overheating.
