This component is crucial for efficient heating and cooling in your vehicle, ensuring that you have a comfortable driving experience regardless of the weather outside. Over time, air conditioning regulators can wear out or fail due to age and usage, making timely replacement important to maintain optimal climate control within your car.

When replacing the air conditioning regulator, it is recommended to follow the manufacturer’s guidelines to ensure proper installation. Typically, the process involves removing the dashboard trim and accessing the component in the vehicle’s cabin, which should be carried out by a professional mechanic or someone with experience in automotive repairs.

Technical Information

• Manufacturer: PSA
• Model: Citroën C1, Peugeot 107
• Product Codes: 55900-0H040, 55900-0H020
• Additional Numbers: 6452P6

Direct-fit replacement heating control button (part code 6451SK) designed for the early Citroën C1 and Peugeot 107 models. Ideal for professional workshops and DIY mechanics who need a reliable spare part to restore heating and climate control functionality. The switch is commonly searched by the product code 6451SK, making it easy to find and order for vehicles of the first production series.

Features

• Direct fit for first-series Citroën C1 and Peugeot 107.
• Replacement for the original heating control switch used in early model center consoles.
• Straightforward installation — plug-in electrical connector and retaining clips/screws.
• Useful for restoring proper control response, indicator illumination and mechanical operation of the heating control panel.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën C1 (first series); Peugeot 107 (first series)
• Product Codes: 6451SK
• Other Numbers: No additional cross-reference numbers provided

Fitment And Typical Symptoms

This button is intended for the first-generation Citroën C1 and Peugeot 107. Common symptoms indicating a faulty heating control button include unresponsive or intermittent operation, a button that sticks or does not engage, failure of internal illumination, or erratic behaviour of the heating/ventilation control related to that specific switch.

Replacement And Installation

1. Disconnect the vehicle battery before starting removal to avoid short circuits and prevent damage.
2. Remove the centre console trim using appropriate plastic trim tools to avoid breaking clips or scratching panels.
3. Unscrew or release the retaining clips holding the control module; carefully pull the module forward to access the connector.
4. Unplug the multi-pin electrical connector from the back of the button assembly and remove the old switch.
5. Install the new heating control button, reconnect the electrical connector and test the function and illumination before reassembling the trim.
6. Reassemble trim and reconnect the battery. Verify full functionality with the vehicle running if required.

Why The Part Commonly Fails

• Mechanical Wear: Repeated use over many years can wear the internal actuator and latching mechanism.
• Electrical Contact Degradation: Oxidation or pitting on contact surfaces can cause intermittent or failed operation.
• Environmental Damage: Moisture ingress, spilled liquids or corrosion can impair switch function and illumination.
• Plastic Fatigue: Age-related brittleness may cause housing clips or button elements to crack or break during use or removal.

Installation Recommendations

• Always disconnect the battery before removal and follow the vehicle manufacturer’s disassembly sequence to prevent damage to surrounding components.
• Use non-marring plastic trim tools to remove panels; avoid excessive force on clips and connectors.
• Inspect the wiring harness and connector for corrosion or damage; clean contacts if necessary before installing the new switch.
• After fitting, verify all functions (switch response, illumination and related HVAC behaviour) before completing reassembly.

If you are replacing a worn or failed button from a first-series Citroën C1 or Peugeot 107, reference the product code 6451SK when ordering to ensure correct fitment.