Parts for your 2006 Mitsubishi Pajero-Tx valve

2006 Mitsubishi Pajero TX valve: what it does, where it lives, and how to keep it happy

Technical sources confirm the 2006 Mitsubishi Pajero is fitted with a thermal expansion valve (TX valve/TXV) as part of its DENSO air‑conditioning system. The Mitsubishi Workshop Manual (Group 55A – Heating and Air Conditioning) for the V60/V80 series details a block‑type expansion valve at the evaporator inlet, and the Mitsubishi ASA Electronic Parts Catalogue lists an “Expansion Valve” for 2006 NM/NP/NS Pajero variants. Models equipped with rear A/C also have a second TXV at the rear evaporator. So yes—TX valve is relevant and used on this Pajero.

On this model, the TX valve meters liquid refrigerant into the evaporator based on evaporator outlet temperature and pressure. By keeping the evaporator just shy of freezing, it maximises heat transfer, stabilises vent temperatures, and protects the compressor from slugging. When a Pajero’s TX valve sticks or clogs, owners often see weak cooling at idle, icy lines or evaporator frosting, a big split between high and low side pressures, or hunting cabin temps.

Servicing advice for the Pajero’s TX valve is pretty straightforward. It’s a sealed system component, so it isn’t a “clean and refit” item, it’s inspect, test, and replace if faulty. Good shops will:

• Recover the R134a properly and cap lines to keep moisture out.
• Access the front TXV at the evaporator (behind the glovebox), on rear‑air models, the second TXV sits near the rear evaporator in the quarter trim.
• Replace O‑rings, lubricated with the Mitsubishi‑specified PAG oil, and fit the correct block‑type valve for the VIN.
• Evacuate to deep vacuum, leak‑test, then recharge to the Pajero’s specified mass (front‑only and dual‑air charges differ).
• Replace the receiver/drier whenever the circuit’s been opened to avoid moisture and acid formation that can kill a fresh TXV.

A Pajero that cools fine on the highway but struggles in traffic, or shows vent temps that bounce around, is a classic candidate for TXV checks alongside condenser airflow, fan operation, and refrigerant charge. Given the age of a 2006 truck, contamination from aged hoses or a tired compressor can also lodge in the valve. When replacing the TXV, cleaning the system and fitting a new drier is cheap insurance. Done right, the A/C should pull strong, stable temps even on a scorcher.

• Where is the TX valve on a 2006 Pajero?
  On front‑A/C Pajeros, the TXV mounts on the evaporator block inside the HVAC case behind the glovebox. Dual‑air models have a second TXV at the rear evaporator in the rear quarter trim area. Access commonly involves glovebox and trim removal.
• What symptoms point to a failing TX valve?
  Weak cooling at idle, fluctuating vent temps, frosty evaporator or lines, hissing at the firewall, and abnormal high/low pressure readings. Contamination or moisture inside the system can make the valve stick or restrict flow.
• Should the receiver/drier be replaced with the TX valve?
  Yes. Any time the system is opened—or if the valve has failed due to debris—replace the receiver/drier, renew O‑rings, evacuate thoroughly, and recharge by weight to protect the new TXV and compressor.