A/C Pressure Switch 1803835 – Alltrux ATX922-1221

The Alltrux ATX922-1221 A/C Pressure Switch is a direct replacement for OEM 1803835 and is engineered for heavy-duty truck air conditioning systems operating under demanding commercial conditions. This high-pressure cutoff switch monitors refrigerant pressure levels and automatically protects the compressor and HVAC components from over-pressurization damage.

Designed for compatibility with PACCAR platforms including Peterbilt and Kenworth applications, this switch ensures proper compressor cycling and system safety. When refrigerant pressure exceeds safe operating thresholds, the switch interrupts compressor engagement — helping prevent costly failures and downtime.

Manufactured for durability in fleet environments, the ATX922-1221 features a corrosion-resistant body and dependable electrical connectivity for long service life. Ideal for truck repair shops, fleet maintenance programs, and HVAC system rebuilds.

Always verify connector style and thread configuration before installation.

Key Features

• Direct replacement for OEM 1803835

• Alltrux Part Number: ATX922-1221

• High-pressure A/C pressure switch

• Designed for heavy-duty truck air conditioning systems

• Helps control compressor operation based on refrigerant pressure

• Durable metal body with reliable electrical connection

Technical Specifications

• Brand: Alltrux
  
• Part Number: ATX922-1221
  
• OEM Cross Reference: 1803835
  
• Product Type: A/C Pressure Switch
  
• System: Air Conditioning / HVAC
  
• Switch Type: High-pressure cutoff
  
• Mounting: System mounted
  
• Condition: New Aftermarket
  
• Application: Heavy-Duty Truck A/C Systems

Cross References

• BENDIX / PACCAR: 1803835
  
• ALLTRUX: ATX922-1221
  
• PRIMATECH: PTAC1439
  
• MEI / TRUCKAC+: 1439
  
• AIRSOURCE: 1126561439
  
• RED DOT: RD-5-8220-0P
  
• OTHERS: 2217001, 2933137, ABPN83318170, 651323, 71R6180, 8508402