Standard Ignition AX412 A/C Evaporator Temperature Sensor

OE-Style A/C Evaporator Temperature Sensor

Standard Ignition AX412 is a direct-fit A/C evaporator temperature sensor built for HVAC temperature monitoring in Ram and Dodge Ram trucks. It is made to match OE fit, form, and function for straightforward replacement on 2006-2019 Ram 1500, Ram 2500, and Ram 3500 applications.

For drivers searching for an A/C evaporator temperature sensor for 2011-2019 Ram 1500 or 2006-2010 Dodge Ram 2500, AX412 provides the correct connector style and terminal layout for the listed vehicles.

• Direct-fit OE replacement for the evaporator temperature sensor location
• Female connector with rectangular plug-in design
• 2 male pin terminals for the specified HVAC connection
• Built with materials selected for demanding under-dash conditions
• Individually tested for reliability and consistent performance
• Standard Ignition AX412 fitment for Ram and Dodge Ram truck HVAC systems

How It Works

The evaporator temperature sensor monitors evaporator core temperature so the HVAC control system can manage A/C operation and help prevent evaporator freeze-up. Standard Ignition AX412 is engineered as an OE replacement for Ram 1500, Ram 2500, and Ram 3500 trucks, with the connector gender, shape, and terminal configuration needed for the listed applications. This part cross-references 68004239AA and TS57539 for the same application.

Common Problems It Can Address

• Inconsistent A/C cooling performance
• Evaporator icing or freeze-up concerns
• HVAC temperature sensor fault codes
• Compressor cycling issues related to evaporator temperature input
• Loss of accurate evaporator temperature feedback to the control module

Installation Notes

Verify connector shape, terminal count, and vehicle application before installation. AX412 uses a female rectangular plug-in connector with two male pin terminals, so the harness connection should match the original sensor interface. Confirm the sensor location on the HVAC case for the specific Ram or Dodge Ram model year before removal and replacement.

Quality Assurance

Standard Ignition states that this sensor is manufactured with complete quality control throughout production and is tested to support reliable operation. The OE-style replacement design is intended to match the original part’s fit and function for the listed Ram and Dodge Ram trucks.