Description
Heating and manual air conditioning control unit complete with linkages for CITROEN C1 and PEUGEOT 107 vehicles up to 2014.
Product Overview
Complete heater and manual climate control unit with mechanical linkages, designed for Citroën C1 and Peugeot 107 models up to 2014. This unit controls temperature selection, airflow distribution and fan speed on vehicles equipped with manual HVAC (Heating, Ventilation, Air Conditioning) systems. Commonly searched by part numbers such as 55900-0H040 and 55900-0H020.
Key Features
- Direct replacement for original manual climate control assemblies (complete with linkages).
- Controls temperature, blower speed and vent selection via mechanical sliders/knobs.
- Simple electrical connectors for illumination and fan motor control; mechanical linkages operate internal blend and mode flaps.
- Compatible with Citroën C1 and Peugeot 107 models produced up to 2014.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C1, Peugeot 107 (models up to 2014)
- Product Codes: 55900-0H040, 55900-0H020
- Other Numbers: 6452P6, 6451SG, 6451SJ, 6451SH
How It Works
This assembly provides manual control over cabin climate: a fan-speed potentiometer or switch regulates blower motor power, temperature selection moves the heater valve or blend flap via a cable/linkage, and distribution controls position internal flaps to direct airflow (windscreen, face, or feet). Electrical connectors supply backlighting and control signals to the blower circuit.
Why This Part Fails
- Mechanical Wear: Plastic sliders, gears or cable ends can become brittle and break with age, causing stuck or unresponsive controls.
- Potentiometer Wear/Contact Issues: Repeated use may wear the fan-speed switch or potentiometer tracks, resulting in intermittent blower speeds or no fan control.
- Cable/Linkage Damage: Linkage ends can detach or corrode, preventing correct flap movement.
- Connector Corrosion or Wiring Issues: Corroded contacts can interrupt illumination or blower control signals.
How To Replace
- Always disconnect the negative battery terminal before starting work to avoid short circuits and electrical damage.
- Remove the center console trim surrounding the climate unit using trim tools to avoid damaging clips.
- Unscrew the retaining screws securing the control unit and gently pull the unit forward.
- Note the routing and orientation of each linkage and mark positions if necessary to ensure correct reassembly.
- Disconnect electrical connectors and detach linkages (some linkages use simple snap clips or ball joints).
- Fit the replacement unit by reconnecting linkages and electrical plugs, verify smooth movement of flaps and correct connector seating.
- Reconnect the battery and test all functions: fan speeds, temperature changes and vent selection before reassembling trim.
Installation Recommendations
- Use plastic trim tools to avoid breaking dashboard clips and trim pieces.
- Inspect cable ends and internal flap movement while the unit is removed; replace damaged linkages if necessary.
- Check related fuses and blower motor operation if symptoms persist after replacement.
- Ensure connectors are clean and free of corrosion; apply a light dielectric grease on metal contacts if appropriate.
Notes For Mechanics And DIYers
This climate control is a straightforward, cost-effective repair for common HVAC faults on Citroën C1 and Peugeot 107. Because many customers search by part number, listing both 55900-0H040 and 55900-0H020 and related identifiers (6452P6, 6451SG, 6451SJ, 6451SH) helps find the correct unit quickly. Ideal for workshop technicians and competent DIY technicians comfortable removing dash trim and handling simple mechanical linkages.
