HomeHVAC > SensorsStandard Ignition AX412 A/C Evaporator Temperature Sensor
Part #: AX412

Standard Ignition AX412 A/C Evaporator Temperature Sensor

40 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Ram and Dodge, 1500, 2500, 3500, Ram 1500, Ram 2500, and Ram 3500
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Standard Ignition A/C Evaporator Temperature Sensor AX412

The Standard Ignition A/C Evaporator Temperature Sensor AX412 is designed to provide accurate temperature readings for the HVAC system in Dodge Ram trucks. This sensor ensures optimal air conditioning performance by monitoring evaporator temperature and preventing system freeze-ups.

  • Connector Gender: Female
  • Connector Quantity: 1
  • Connector Shape: Rectangular
  • Connector Type: Plug in
  • Terminal Gender: Male
  • Terminal Quantity: 2
  • Terminal Type: Pins
  • Compatible with Dodge Ram 1500, 2500, and 3500 models

Detailed Product Description

The AX412 A/C Evaporator Temperature Sensor from Standard Ignition features a female rectangular plug-in connector with one connection point, designed for secure and reliable electrical contact. It includes two male pin terminals that facilitate precise signal transmission to the vehicle’s HVAC control module. This sensor is engineered to fit Dodge Ram 1500, Ram 2500, and Ram 3500 trucks, ensuring proper integration with the factory wiring harness and HVAC system.

By accurately measuring the evaporator temperature, this sensor helps regulate the air conditioning system to maintain comfortable cabin temperatures and prevent evaporator coil freeze-up. The plug-in connector design simplifies installation and replacement, reducing downtime and ensuring consistent HVAC performance.

Common Applications and Issues Addressed

  • Prevents A/C system freeze-ups caused by inaccurate evaporator temperature readings
  • Helps maintain consistent cabin temperature control in Dodge Ram 1500, 2500, and 3500 models
  • Resolves HVAC system faults related to sensor failure or poor electrical connection
  • Supports proper operation of the vehicle’s climate control system
  • Eliminates intermittent A/C compressor cycling due to faulty sensor input

Installation Notes and Tips

  • Ensure the vehicle is turned off and the battery is disconnected before installation
  • Locate the evaporator temperature sensor within the HVAC housing of Dodge Ram 1500, 2500, or 3500
  • Disconnect the existing sensor’s female rectangular plug carefully to avoid damage
  • Connect the new AX412 sensor’s plug firmly to the wiring harness
  • Verify that the two male pin terminals are properly seated and secure
  • After installation, reconnect the battery and test the A/C system for proper operation

Quality Assurance and Warranty

Standard Ignition manufactures the AX412 A/C Evaporator Temperature Sensor to meet or exceed OEM specifications for fit, form, and function. Each sensor undergoes rigorous quality control testing to ensure reliable performance in Dodge Ram 1500, 2500, and 3500 trucks. This part is backed by Standard Ignition’s limited warranty, providing coverage against defects in materials and workmanship under normal use.

BrandStandard Ignition
Part NumberAX412
Connector GenderFemale
Connector ShapeRectangular
Connector TypePlug In
ContentsSensor
Terminal GenderMale
Terminal TypePins

This part fits 40 vehicles. Search below:

YearMakeModelPositionNotes
2019Ram1500N/A
2018Ram1500N/A
2018Ram2500N/A
2018Ram3500N/A
2017Ram1500N/A
2017Ram2500N/A
2017Ram3500N/A
2016Ram1500N/A
2016Ram2500N/A
2016Ram3500N/A
2015Ram1500N/A
2015Ram2500N/A
2015Ram3500N/A
2014Ram1500N/A
2014Ram2500N/A
2014Ram3500N/A
2013Ram1500N/A
2013Ram2500N/A
2013Ram3500N/A
2012Ram1500N/A
2012Ram2500N/A
2012Ram3500N/A
2011Ram1500N/A
2011Ram2500N/A
2011Ram3500N/A
2010DodgeRam 1500N/A
2010DodgeRam 2500N/A
2010DodgeRam 3500N/A
2009DodgeRam 1500N/A
2009DodgeRam 2500N/A
2009DodgeRam 3500N/A
2008DodgeRam 1500N/A
2008DodgeRam 2500N/A
2008DodgeRam 3500N/A
2007DodgeRam 1500N/A
2007DodgeRam 2500N/A
2007DodgeRam 3500N/A
2006DodgeRam 1500N/A
2006DodgeRam 2500N/A
2006DodgeRam 3500N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

68004239AATS57539WT5848

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.