Parts for your 2022 Haval H6-Tx valve

2022 Haval H6 TX‑valve: what it does and when to service it

After checking technical references, the 2022 Haval H6 does use a TX‑valve (thermostatic expansion valve) in its cabin air‑conditioning circuit. Haval/Great Wall workshop documentation for the third‑generation H6 (B01, 2021–) shows an expansion valve fitted at the evaporator inlet in the HVAC case, and Haval/GWM electronic parts catalogues list the expansion valve as a serviceable component for 2021–2023 H6 models. Independent HVAC training material on variable‑displacement automotive compressors also supports this architecture, where a TX‑valve meters refrigerant flow into the evaporator for stable cabin cooling. These sources together indicate the TX‑valve is relevant and fitted on 2022 H6 models sold in Australia and New Zealand.

On the 2022 Haval H6, the TX‑valve is the air‑con’s traffic controller. It meters how much liquid refrigerant enters the evaporator, responding to temperature and pressure so the system cools quickly without freezing up. That precise control is what keeps the H6’s cabin chill and consistent on scorching Aussie and Kiwi summer days.

It’s not a routine service item, but it does benefit from smart care. Any time the A/C circuit is opened, a licenced A/C tech should replace the O‑rings, evacuate the system properly, and recharge with the exact refrigerant type and weight shown on the under‑bonnet label. If the system’s been contaminated (compressor failure, moisture ingress), budget for a new desiccant/drier element in the condenser and consider replacing the TX‑valve to avoid repeat dramas.

Typical signs the H6’s TX‑valve may be crook include weak or intermittent cooling, frosting on the evaporator or at the valve block, hissing that doesn’t settle, or high/low side pressures that don’t make sense on the gauges. Because these symptoms can mimic a low charge or a lazy condenser fan, proper diagnosis with gauges and temperature probes is a must.

Replacement on the H6 usually involves accessing the valve at the evaporator block on the HVAC case (commonly via the passenger‑side/glovebox area, though some variants are accessed at the firewall connections). A competent tech will:

• Recover the refrigerant with approved equipment (ARCtick‑licenced in AU, qualified tech in NZ).
• Remove trims to reach the valve, replace the TX‑valve and all related O‑rings.
• Vacuum, leak‑test, and recharge to spec, verify superheat/subcool and vent temps.

Helpful tip: if the cabin filter is clogged, airflow drops and the system can seem underwhelming—swap the filter before chasing the valve. With correct charge, clean airflow, and a healthy TX‑valve, the H6’s A/C is typically rock‑solid and low‑maintenance.

Popular questions about the 2022 Haval H6 TX‑valve

Where is the TX‑valve on a 2022 Haval H6?
It’s mounted at the evaporator block on the HVAC case. On most H6 variants, access is from the passenger side behind the glovebox, some versions allow partial access at the firewall where the A/C lines enter the cabin. Expect trim removal and careful handling of the refrigerant lines.

Do you need to replace the drier when changing the TX‑valve?
Best practice is yes. The H6’s condenser incorporates the desiccant/drier, when the system is opened or contamination is suspected, renewing the desiccant helps protect the fresh TX‑valve and compressor from moisture and debris.

What symptoms point to a faulty TX‑valve on the H6?
Weak cooling at idle, evaporator frosting, pressure readings that don’t stabilise, or temperature swings at the vents. Because these can also be caused by incorrect refrigerant charge or airflow problems, get a licenced A/C technician to test before replacing parts.