Upgrade or repair your vehicle’s climate control with this genuine-style manual HVAC controller designed for Citroën C1 and Peugeot 107 models produced up to 2014. Ideal for professional mechanics and DIY enthusiasts, this unit replaces the factory heater and manual air conditioning controller and is often searched by product codes 55900-0H040 and 55900-040. The control comes with mechanical link rods (control cables) that operate flaps and temperature/airflow selectors — a direct-fit replacement for worn or broken dashboard controllers.

Function And Benefits

The unit manages temperature selection, airflow distribution and fan speed for vehicles equipped with manual climate control. Mechanical control rods transmit selector movements to internal flaps and blend doors, providing reliable, tactile operation without requiring complex software configuration. Replacing a faulty control restores full manual control of cabin temperature and ventilation, improving comfort and driving safety.

How To Replace

1. Remove the necessary dashboard trim panels to access the HVAC control panel (refer to vehicle repair manual for exact trim removal points).
2. Disconnect the electrical connector and carefully release the control rods from their levers — note rod routing and clip positions for reassembly.
3. Unfasten the retaining screws and remove the old control unit.
4. Install the replacement unit, secure with screws, reconnect the control rods and electrical connector, and reassemble trim panels.
5. Test all functions (fan speeds, temperature slider, airflow direction) before finishing. Adjust rod end positions if necessary to ensure accurate flap movement.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën C1, Peugeot 107 (up to 2014)
• Product Codes: 55900-0H040, 55900-040
• Additional Numbers: 6452P6, 6451SG, 6451SJ, 6451SH

Installation Recommendations

• Disconnect The Battery Before Starting Work To Avoid Short Circuits And Protect Electrical Components.
• Keep Track Of Control Rod Routing And Clips; Incorrect Reconnection Can Lead To Misadjusted Flap Positions.
• Handle Plastic Tabs And Rod Ends Carefully — They Are Common Break Points During Removal.
• After Installation, Verify Full Range Of Motion For All Controls And Check That Airflow And Temperature Respond Correctly.

Common Failure Causes

Manual climate controllers on these models commonly fail due to broken plastic levers, worn or detached control rods, and internal potentiometer or switch wear from long-term use. Exposure to heat and repeated mechanical stress can cause clips and sliders to crack or lose precision, resulting in stuck flaps, non-responsive temperature control or intermittent fan speed operation.

Choose this replacement if your climate controls are stiff, unresponsive, making noise, or if mechanical linkages are broken. Properly fitted, the unit restores reliable manual control of your vehicle’s heating and ventilation system.

Overview

This complete heater and manual climate control unit with linkages is a direct-fit replacement for Citroën C1 and Peugeot 107 models produced until 2014. Designed for workshop technicians and competent DIYers, the unit controls temperature, airflow distribution and fan speed and provides direct mechanical actuation of blend and flap positions via supplied cables. Many customers search by part number—include the reference codes in your lookup to find the correct item quickly.

Features And Function

• Manual temperature control and fan-speed adjustment for reliable cabin comfort.
• Mechanical linkages (cables) for flap and blend control—robust replacement for worn or broken originals.
• Integrated switches for recirculation and A/C compressor engagement where applicable.
• Simple, serviceable design that allows targeted replacement without replacing the whole HVAC assembly.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C1, Peugeot 107
• Product Codes: 55900-0H040, 55900-0H020, 55900-020, 55900-040, 559000H020, 559000H040
• Additional Numbers: 6452P6, 6451SG, 6451SJ, 6451SH

Compatibility And Notes

Fits Citroën C1 and Peugeot 107 versions up to model year 2014 that use manual climate controls with cable-actuated flaps. Confirm fitment by matching the product codes listed above with the original part number. This assembly replaces both the control unit and the associated linkages, making it ideal when cables are snapped or internal controls are worn.

Installation Recommendation

• Always disconnect the battery before starting work to avoid electrical short circuits and protect vehicle electronics.
• Remove the center fascia trim carefully to avoid breaking plastic clips. Use appropriate trim tools and keep screws and clips organized.
• Label or photograph cable routing and connector positions before removal to ensure correct reassembly.
• Disconnect electrical connectors and unclip cable ends from the control levers. Replace linkages into their correct mounting points—do not force them; they should seat smoothly.
• After installation, verify all functions (temperature range, fan speeds, flap positions, recirculation and A/C switching if present) before refitting the trim.
• If in doubt about trim removal or electrical connections, have the work performed by a professional workshop.

How The Part Commonly Fails

Failures are usually mechanical or electrical in nature: plastic cables and levers become brittle with age and can snap; internal potentiometers or sliders wear out causing intermittent or stuck temperature and fan controls; dust and dirt build-up can impede smooth movement; and sun exposure accelerates degradation of plastic components. These issues typically appear on higher-mileage or older vehicles and often present as stuck flaps, missing fan speeds or inability to change temperature smoothly.

Why Buy This Replacement

Replacing the complete control assembly with linkages restores reliable manual control of HVAC functions without the need to overhaul the heater box. The unit is aimed at mechanics and equipped DIYers who want a direct-fit, serviceable solution that addresses both electrical and mechanical wear in a single replacement.

Useful Tips

• Check connector pins for corrosion and clean contacts if necessary before installation.
• Test the unit on-bench (where possible) for basic functionality before final installation.
• Keep original breakable clips and routing clips as reference or replace them during reassembly to ensure secure cable routing.
• Search online and in catalogs using one of the product codes for faster cross-referencing.

Product Overview

This is a direct-fit manual heater control unit designed for Citroën C1 and Peugeot 107 models produced up to 2014. The panel allows control of fan speed, temperature mixing and airflow direction for vehicles equipped with manual climate control. It is a commonly replaced component in older small city cars where knobs, potentiometers or mechanical linkages wear out over time.

Function

The unit controls the following functions on vehicles with manual HVAC systems: fan speed selection, temperature adjustment (blend), airflow distribution (face/feet/windshield) and, depending on variant, air recirculation. On many models the control panel transmits movement via cables (linkages) to internal heater/airbox flaps; some versions include the cable set as part of the assembly.

Replacement Procedure

• Disconnect the negative battery terminal before starting to avoid short circuits and protect vehicle electronics.
• Carefully remove surrounding trim panels in the center console to access the heater control unit. Use trim tools to avoid damaging plastic clips.
• Unscrew mounting fasteners and gently pull the unit forward to access electrical connectors and any cable linkages.
• Release electrical connectors and detach control cables if present (note their routing and orientation for reassembly).
• Install the new unit by reversing the removal steps: connect electrical plugs, reattach cables and secure the unit with original fasteners. Refit trim panels and reconnect the battery.

Installation Recommendations

• Always disconnect the battery before removal and follow the vehicle manufacturer’s assembly/disassembly sequence to avoid damage to connectors and control modules.
• If the unit is supplied with control linkages, ensure cables are routed and clipped in the same positions as the originals to prevent binding of the heater/ventilation flaps.
• Check related components during replacement: cable ends, cable guides, dash clips and the condition of the ventilation flaps/blend door actuators. A faulty actuator or blocked duct can mimic a control panel fault.
• Use basic hand tools and plastic trim tools; avoid prying directly on the faceplate to prevent cosmetic damage.

Why The Part Fails

Common failure modes include worn rotary potentiometers or switches, broken plastic knobs or mounting tabs, and frayed or detached control cables. Frequent use, exposure to heat cycles and mechanical stress on small plastic parts accelerate wear. Dust and debris from the HVAC ducts can also affect switch feel and electrical contacts over time.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C1, Peugeot 107 (up to 2014)
• Product Codes: 55900-0H040, 55900-0H020
• Additional Numbers: 6452P6, 6451SK

Compatibility Notes

This heater control is intended for vehicles listed above; compatibility is typically confirmed by the product codes stamped on the original part. When ordering, match the product code printed on your existing unit to ensure correct fitment and function. Units are commonly sought under the referenced product numbers.

Who Should Install

The replacement is suitable for experienced DIYers with basic dashboard trim experience and for professional technicians. If you are unsure about handling dashboard components or cable routing, consider professional installation to avoid damage to interior trim or HVAC components.