Volvo FH FM AC Pressure Sensor Switch 21065047 742106507 12V Euro 5 Used Other Air Conditioning & Heating

Description:
This listing is for a used genuine Volvo air conditioning refrigerant pressure sensor and harness assembly, OE part number 21065047. It is used on Volvo FH and FM series heavy trucks (including FH, FH II, FH13, FM, FM13) for monitoring high-side refrigerant pressure in the AC circuit and protecting the system from over- or under-pressure. Multiple catalogues and aftermarket cross references confirm 21065047 as an AC pressure switch / sensor for Volvo trucks, with Renault Trucks equivalent 742106507.

The sensor screws into the AC high-pressure line via a 3/8-24 UNF thread and connects to the vehicle harness with a 3-pin D-shape female plug and yellow secondary lock. Electrical supply is 12V, and the sensor provides status/pressure information to the climate control system and engine ECU to enable compressor engagement and cooling fan control.

This particular unit comes complete with the attached Volvo harness section, as shown in the photos. It was removed from a running Euro 4–5 Volvo FH/FM vehicle and tested prior to dismantling to ensure correct operation. The metal body shows typical corrosion/oxidation from normal service, while the plastic connector, locking tabs and loom insulation remain in good condition with no breaks or cuts. There are no visible cracks, fluid leaks or mechanical damage.

Key features and technical data:
- Genuine Volvo OE AC refrigerant pressure sensor
- OE number: 21065047
- Cross references: Renault Trucks 742106507, NRF 38976, Cojali 20400042, Nissens 301025, Kavlico 3ACP0036
- Application: Volvo FH, FH II, FH13, FM, FM13 trucks (Euro 4–5, various engines including D13)
- System: Heating & air conditioning (HVAC) high-side pressure monitoring
- Thread: 3/8-24 UNF male, approx. HEX 24 mm
- Electrical: 3-pin connector, 12V supply
- Approximate harness length: 40 cm (complete as pictured)
- Approximate weight: 0.18 kg
- Country/Region of manufacture for common aftermarket equivalents: Netherlands (NRF 38976)

Compatibility:
Primarily used on Volvo FH and FM trucks, including FH12, FH16, FH, VNL variants and FM/FM13 within the 2005–2014 production range, mainly Euro 4 and Euro 5 AC systems. Always match by part number (21065047 or 742106507) and consult your Volvo dealer or workshop with your VIN if unsure, as AC system components can vary by year and specification.

Installation notes:
This sensor is a direct screw-in replacement for the original unit. The AC system must be safely discharged and later evacuated and recharged by qualified personnel when replacing pressure components. No coding or programming is usually required, but any stored HVAC or engine fault codes should be cleared after installation and system tested for correct compressor operation and cooling performance.

Shipping & Returns:
We ship across UK/EU with tracked services. Returns accepted within 30 days; buyer pays return postage. Please inspect upon arrival and message us with any concerns.

Why Buy From Us:
Genuine part, 3-month warranty, fast dispatch, secure packaging. All parts are removed from tested vehicles and inspected before listing to ensure reliable service for your Volvo truck.