Four Seasons 20894 HVAC Pressure Transducer

HVAC Pressure Transducer for Mercedes-Benz

Four Seasons 20894 is a system-mounted HVAC pressure transducer built for vehicles that use a 3-pin rectangular connector and a 3/8 in. x 24 male fitting. It meets or exceeds OEM requirements and is made with plastic and metal construction for direct replacement service on supported Mercedes-Benz and Chrysler applications.

Four Seasons Pressure Switch line focuses on accurate HVAC pressure monitoring and reliable electrical signaling for air conditioning system control. This transducer is a direct-fit replacement for many Mercedes-Benz models, including E-Class, S-Class, SL-Class, C-Class, ML-Class, and CLK applications, as well as the Chrysler Crossfire.

• Four Seasons part number 20894
• HVAC pressure transducer with system-mounted design
• Rectangular male connector with 3 terminals
• 3/8 in. x 24 male fitting thread
• Weather Pack sealed connector design
• Meets or exceeds OEM specifications
• Cross-reference: UAC SW11109C

Detailed Product Overview

This HVAC pressure transducer monitors refrigerant pressure and sends a variable signal to the vehicle’s climate control system. On Mercedes-Benz models such as the C230, E320, S500, SL500, ML320, and CLK430, the correct pressure switch helps the A/C system respond properly to changing operating conditions. Four Seasons 20894 is engineered for direct replacement use where the original sensor uses the same connector style and threaded fitting.

Use this part when servicing pressure-related HVAC faults on 1994-2008 Mercedes-Benz and Chrysler Crossfire applications. The Four Seasons 20894 designation is also useful when cross-checking catalog listings for the same pressure transducer application.

Common Issues This Part May Resolve

• A/C compressor cycling problems caused by incorrect pressure signal input
• HVAC system shutdown related to pressure sensor failure
• Intermittent air conditioning operation from worn electrical contacts
• Fault codes tied to refrigerant pressure monitoring
• Poor climate control response on supported Mercedes-Benz and Crossfire vehicles

Installation Notes and Tips

Verify connector shape, terminal count, and fitting thread before installation. This unit uses a male 3/8 in. x 24 threaded connection and a 3-pin rectangular connector, so matching the original sensor style is important for proper fitment. Confirm the system-mounted location and inspect the connector for corrosion or damaged terminals before reconnecting the harness.

Compatible With 2004-2008 Chrysler Crossfire, Pressure Switch; 1998-2006 Mercedes-Benz CL500, Pressure Switch; 2001-2006 Mercedes-Benz CL55 AMG, Pressure Switch; 2001-2006 Mercedes-Benz CL600, Pressure Switch; 1998-1999 Mercedes-Benz CL600, Pressure Switch; 2005-2006 Mercedes-Benz CL65 AMG, Pressure Switch; 2006 Mercedes-Benz S350, Pressure Switch; 1994-1995 Mercedes-Benz S350, Pressure Switch; 1999-2006 Mercedes-Benz S430, Pressure Switch; 1994-2006 Mercedes-Benz S500, Pressure Switch; 2001-2006 Mercedes-Benz S55 AMG, Pressure Switch; 1994-2006 Mercedes-Benz S600, Pressure Switch; 2005-2006 Mercedes-Benz S65 AMG, Pressure Switch; 2002-2005 Mercedes-Benz C230, Pressure Switch; 1996-2000 Mercedes-Benz C230, Pressure Switch; 2001-2005 Mercedes-Benz C240, Pressure Switch; 2001-2005 Mercedes-Benz C320, Pressure Switch; 2005 Mercedes-Benz C55 AMG, Pressure Switch; 2002-2005 Mercedes-Benz G500, Pressure Switch; 2003-2005 Mercedes-Benz G55 AMG, Pressure Switch; 2003-2005 Mercedes-Benz ML350, Pressure Switch; 2002-2005 Mercedes-Benz ML500, Pressure Switch; 1994-2005 Mercedes-Benz SL500, Pressure Switch; 2002-2005 Mercedes-Benz SL55 AMG, Pressure Switch; 1994-2005 Mercedes-Benz SL600, Pressure Switch; 2005 Mercedes-Benz SL65 AMG, Pressure Switch; 2003-2005 Mercedes-Benz SLK200, Pressure Switch; 2005 Mercedes-Benz SLK350, Pressure Switch; 2005 Mercedes-Benz SLK55 AMG, Pressure Switch; 2001-2004 Mercedes-Benz C200, Pressure Switch; 2002-2004 Mercedes-Benz C32 AMG, Pressure Switch; 1998-2004 Mercedes-Benz SLK230, Pressure Switch; 2002-2004 Mercedes-Benz SLK32 AMG, Pressure Switch; 2001-2004 Mercedes-Benz SLK320, Pressure Switch; 1998-2003 Mercedes-Benz CLK320, Pressure Switch; 1999-2003 Mercedes-Benz CLK430, Pressure Switch; 2003 Mercedes-Benz CLK500, Pressure Switch; 2001-2003 Mercedes-Benz CLK55 AMG, Pressure Switch; 1994-2003 Mercedes-Benz E320, Pressure Switch; 2002-2003 Mercedes-Benz E500, Pressure Switch; 1997 Mercedes-Benz E500, Pressure Switch; 1994 Mercedes-Benz E500, Pressure Switch; 1998-2003 Mercedes-Benz E55 AMG, Pressure Switch; 1998-2003 Mercedes-Benz ML320, Pressure Switch; 2000-2003 Mercedes-Benz ML55 AMG, Pressure Switch; 1998-2002 Mercedes-Benz E430, Pressure Switch; 1998-2001 Mercedes-Benz ML430, Pressure Switch; 1994-2000 Mercedes-Benz C280, Pressure Switch; 1998-2000 Mercedes-Benz C43 AMG, Pressure Switch; 1999 Mercedes-Benz E280, Pressure Switch; 1995-1999 Mercedes-Benz E300, Pressure Switch; 1997-1999 Mercedes-Benz E420, Pressure Switch; 1994-1995 Mercedes-Benz E420, Pressure Switch; 1994-1999 Mercedes-Benz S320, Pressure Switch; 1994-1999 Mercedes-Benz S420, Pressure Switch; 1997-1999 Mercedes-Benz SL60 AMG, Pressure Switch; 1994-1997 Mercedes-Benz C220, Pressure Switch; 1995-1997 Mercedes-Benz C36 AMG, Pressure Switch; 1994-1997 Mercedes-Benz SL320, Pressure Switch; 1995 Mercedes-Benz S600L, Pressure Switch.

Quality Assurance

Four Seasons 20894 is built to meet or exceed OEM specifications for pressure transducer replacement service. The part is listed with interchange references including UAC SW11109C and other catalog cross-references used for the same application.