Standard Ignition AX504 HVAC Heater Core Temperature Sensor

HVAC Heater Core Temperature Sensor Overview

Standard Ignition AX504 is an HVAC heater core temperature sensor built for Lexus climate control systems that rely on accurate temperature feedback. It uses a female square connector with 2 male pin terminals for a direct electrical interface in the HVAC circuit.

Compatible With Lexus GS F, GS350, IS350, LC500, RC F, RC300, RC350, GS200t, IS200t, RC200t, and IS250 applications across model years 2013-2019. The Standard Ignition AX504 is a direct-fit replacement for vehicles that need precise heater core temperature sensing for proper HVAC operation.

Key Features

• HVAC heater core temperature sensor for Lexus climate control systems
• Female connector with square housing for a secure electrical connection
• 2-pin male terminal design for straightforward circuit integration
• Direct replacement format for select Lexus GS, IS, LC, and RC models
• Standard Ignition AX504 part number for catalog and service matching

Detailed Product Description

This heater core temperature sensor monitors temperature at the HVAC heater core so the climate control module can manage cabin heat output accurately. Standard Ignition AX504 is specified with one female connector, a square connector shape, and two male pin terminals, making it a focused replacement for the original sensor interface used in select Lexus vehicles. It is listed for 2013-2019 Lexus GS350, 2014-2019 Lexus IS350, 2018-2019 Lexus LC500, 2015-2019 Lexus RC F, 2016-2019 Lexus RC300, 2015-2019 Lexus RC350, 2016-2019 Lexus GS F, 2016-2017 Lexus GS200t, 2016-2017 Lexus IS200t, 2016-2017 Lexus RC200t, and 2014-2015 Lexus IS250. This part cross-references 8862030050 and TS57631 for the same application.

Common Symptoms This Sensor May Address

• Inconsistent cabin heat output
• Incorrect HVAC temperature readings
• Climate control response that does not match the selected setting
• Fault codes related to heater core temperature sensing
• Intermittent heating performance in Lexus HVAC systems

Installation Notes and Tips

Verify connector shape, terminal style, and vehicle application before installation. Match the sensor to the original HVAC connector and inspect the harness for corrosion, bent terminals, or heat damage before connecting the replacement. Confirm fitment by year, make, and model, especially on Lexus GS350, IS350, and RC350 applications where multiple HVAC configurations may exist.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and engine management components. AX504 is cataloged as an HVAC heater core temperature sensor with defined connector and terminal specifications to support accurate part matching during service.