Parts for your 2017 Haval H6-Tx valve

2017 Haval H6 TX-valve: what it does and when to service it

For the 2017 Haval H6, a thermal expansion valve (TX-valve) is indeed used in the air-conditioning system. This is supported by Haval/Great Wall workshop literature for the H6 HVAC system (2017 model year), Great Wall Motor electronic parts catalogues listing an A/C expansion valve at the evaporator inlet for H6 variants, and supplier documentation for the variable-displacement compressor setups commonly paired with TXV/receiver-drier systems in this platform.

The TX-valve on a 2017 Haval H6 meters refrigerant into the evaporator, keeping superheat in check so the cabin cools quickly without the evaporator icing up. It reacts to temperature and pressure at the evaporator outlet, adjusting flow as conditions change. That smart metering is why vent temps stay stable in traffic and on the highway, and why the compressor is protected from liquid floodback.

There’s no routine “service” for a TX-valve, but it should be checked when the air-con underperforms or after a major A/C repair. Common giveaways of a crook or restricted valve include weak cooling at idle, vent temperatures that swing hot–cold, frosting or sweating around the valve or firewall lines, low suction pressure with normal high-side pressure, and an evaporator that ices up. Because the valve is at the evaporator inlet, access on many H6s is at the firewall or within the HVAC case, expect a few hours of labour depending on market trim and right/left-hand drive layout.

• Good practice when replacing the TX-valve on an H6:
  • Recover refrigerant with licensed A/C equipment (mandatory in AU/NZ).
  • Replace the receiver–drier (often integrated in the condenser) whenever the system’s opened.
  • Fit new, correct-size HNBR O-rings, lightly oil with the specified PAG oil.
  • Torque the flare/plate fittings to spec to avoid leaks or crushing the valve body.
  • If there’s compressor debris, flush lines and replace the condenser if it’s the non-flushable microtube type.
  • Pressure test with dry nitrogen, evacuate thoroughly, then charge by weight to the under‑bonnet label (typically R‑134a for this model year).

Owners will also notice better results when the cabin filter is kept clean and the condenser face is free of leaves and bugs. If the air-con needs frequent “regas”, that’s a leak—often at O-rings or the TX-valve connections—so a dye or nitrogen/trace-gas leak test is the way to go. Parts pricing for a TX-valve is usually modest, while total cost hinges on access time, shops in Australia and New Zealand often quote a few hours plus refrigerant and sundries.

References (no external links): Haval/Great Wall H6 Workshop Manual (2017) – HVAC/Air Conditioning section, Great Wall Motor EPC for H6 (2017) – A/C Expansion Valve at evaporator inlet, Compressor supplier guides for variable-displacement systems paired with TXV and receiver–drier architecture.

• Where is the TX-valve on a 2017 Haval H6?
  It’s fitted at the evaporator inlet. Depending on trim and steering side, it may be accessible at the firewall joint in the engine bay or inside the HVAC case behind the dash. A technician will confirm access route before quoting labour.
• Will a simple regas fix a TX-valve problem?
  Usually not. A regas only restores refrigerant mass. If the TX-valve is sticking or restricted, symptoms like icing, poor idle cooling or pressure imbalance remain until the valve and any related issues are addressed.
• What does TX-valve replacement typically cost?
  In AU/NZ, expect the valve itself to be relatively inexpensive, with total job cost driven by 2–5 hours of labour, a new receiver–drier, O-rings, refrigerant and oil. Exact pricing depends on access on your specific H6 variant.