Understanding the HVAC Control Module

The HVAC (Heating, Ventilation, and Air Conditioning) Control Module operates much like a standard computer, utilizing circuit boards and microprocessors to respond to temperature sensors, climate control signals, and ventilation switches in real time.

Its software manages critical features such as cabin temperature control, defrosting settings, dual-zone configurations, and in some models, automatic air quality systems.

Backed by professional diagnostic platforms such as JLR engineering-grade tools like the SX JLR Engineering Tool, we’re equipped to program or reconfigure units with dealer-level precision.

Benefits of HVAC Module Coding

• Enable or disable automatic air recirculation
• Control fan speed curves for improved airflow
• Activate cabin pre-conditioning via remote or scheduled events
• Diagnose and reset A/C compressor and blower faults
• Access hidden HVAC features not visible on standard menu interfaces

Other Custom Coding Possibilities

Your vehicle’s control module supports configuration of many secondary systems beyond HVAC:

• Disable Start-Stop System – Eliminate engine auto-off at traffic lights
• Lighting Options – Customize DRLs, fog cornering lights
• Digital Speed Readouts – Add speedometer readout to infotainment cluster
• Auto Mirror Functions – Lower mirror on reverse or enable memory position
• Comfort Features – Auto-hold via EPB, door lock at specific speed

Note: Available features depend on the firmware version and vehicle trim. See this Land Rover Forum Discussion for community experiences with feature unlocks.

Our Services Include

• Clear HVAC-related DTC Codes
• 30-Minute Advanced Diagnosis
• Software Calibration – Existing ECU Flash
• Configuration for New or Used Module Installation
• Custom Flashing and Software Renewal

Supported Vehicle Models

Land Rover & Range Rover:

• PHEV P400e Hybrid
• Defender L316
• Discovery 3 / 4 / 5 (L319 to L462)
• Discovery Sport L550
• Evoque L358 / Evoque 2 L551
• Freelander 2 L359
• Range Rover Sport L320 / L494
• Range Rover Vogue L322 / L405
• Velar L560

Jaguar:

• E-Pace X540
• F-TYPE X152
• F-Pace X761
• I-Pace EV400
• S-TYPE X200–X206
• X-TYPE X400 / X404
• XE X760
• XF X250 / X260
• XJ X350 / X351 / X356 / X358
• XK X100 / X103 / X150

Supported Model Years

We support HVAC and ECU reprogramming across model years:

• 2005 to 2020 – All supported vehicles, trims, and configurations

Important Notice on Safety Features

While we offer the option to disable alert systems like seatbelt warning sounds, we advise customers to exercise caution when removing legal and safety-related features. For example, unbelted passengers or unsecured cargo may become dangerous in high-speed maneuvers or accidents.