Parts for your 2022 Subaru Xv-Tx valve

2022 Subaru XV TX-valve: what it is, what it does, and when to replace it

Referencing Subaru’s factory service information for the GT-platform XV/Impreza HVAC system, OEM parts catalogues listing an “A/C expansion valve” for 2018–2022 XV, and DENSO’s variable-displacement compressor architecture used by Subaru, the 2022 Subaru XV is fitted with a thermostatic expansion valve (TX-valve) rather than an orifice tube. So yes—this vehicle uses a TX-valve, mounted at the evaporator.

On the 2022 XV, the TX-valve meters liquid refrigerant into the evaporator, reacting to temperature and pressure to maintain the right superheat. Paired with Subaru’s variable-displacement compressor, it keeps cabin temps stable, helps prevent evaporator icing, and maximises cooling efficiency without wasting fuel. When the TX-valve does its job, the car cools quickly at idle and at speed, with minimal cycling and no frosty evaporator core.

It’s not a routine replacement item, but it can wear or clog from contamination, moisture, or incorrect oil/refrigerant. Typical signs include weak cooling at idle or cruise, the system going cold then warm, hissing at the dash, or pressure readings showing very high high-side with starved low-side—or vice versa if the valve is stuck open. If the system’s been open to atmosphere or suffered compressor debris, the TX-valve is at risk.

• Service tips:
  • Always recover refrigerant, replace O-rings, add the correct PAG oil amount, and evacuate the system before recharging to the exact weight shown on the under‑bonnet label.
  • Replace the receiver‑drier/desiccant when the system’s been opened (often integrated into the condenser on late‑model Subarus—check the service manual).
  • Keep the cabin filter clean and the condenser fins clear to reduce load on the valve and compressor.

Access to the XV’s TX-valve is at the evaporator connection block, depending on market and trim, access is typically via the glovebox/evaporator case area and/or the firewall fittings. Expect trim removal, careful handling of the evaporator pipes, and torqueing the union bolts to spec. Because precision matters, this job is best left to a licensed air‑conditioning technician with the right recovery machine and vacuum pump.

Owners who’ve had a regas that didn’t last, or cooling that’s inconsistent after a compressor swap, should have the system leak‑tested and the TX-valve performance checked. Done properly—with clean internals, fresh O‑rings, the right oil, and the exact refrigerant charge—the XV’s air‑con will run crisp and reliable through Aussie summers and Kiwi winters.

Popular questions about the 2022 Subaru XV TX-valve

Does the 2022 Subaru XV use a TX-valve or an orifice tube?
It uses a thermostatic expansion valve. That design pairs with Subaru’s variable‑displacement compressor to finely control superheat and deliver stable cooling, rather than relying on a fixed orifice.

What symptoms point to a failing TX-valve on an XV?
Intermittent cooling, poor performance at idle, evaporator icing, or pressure readings that show a starved low side with very high high side are common clues. Contamination after a compressor issue can also stick the valve.

Do I need to regas after replacing the TX-valve?
Yes. The system must be recovered, evacuated, and recharged by weight. New O‑rings and the correct oil balance are essential, and the receiver‑drier/desiccant should be renewed if the system’s been open.