20455049 is an A/C pressure transducer sensor. This transducer monitors refrigerant system pressure and signals the HVAC control system to cycle the compressor and protect the A/C circuit. It is sold by Pro Gear and Transmission as a part for technicians replacing a failed or out-of-spec pressure sensor on applicable Volvo truck A/C systems.Interchanges:Volvo 20455049Volvo 20832008Volvo 21582621Volvo 22443552WA905-20-8628FeaturesA/C pressure transducer sensor