Parts for your 2015 Mitsubishi Lancer-Tx valve

2015 Mitsubishi Lancer TX Valve: What it does, when it fails, and how to service it

Yes, the 2015 Mitsubishi Lancer is fitted with a thermostatic expansion valve (often called a TX valve or TXV). Technical sources including the Mitsubishi Motors Service Manual for Lancer CF/CG (HVAC, Group 55A) and the Mitsubishi ASA electronic parts catalogue list an A/C expansion valve mounted at the evaporator inlet. Reputable aftermarket catalogues also carry a dedicated expansion valve for this model. That means a TX valve is relevant to this vehicle’s air-con system, not an orifice-tube arrangement.

The TX valve meters refrigerant into the evaporator based on temperature and pressure, maintaining the right superheat so the core doesn’t flood with liquid. In plain terms, it helps keep vent temps consistent, stops the compressor copping liquid slugging, and makes the most of Aussie and Kiwi summer conditions without the system short-cycling or icing up. When it’s healthy, you get quick cool-down, steady cabin comfort, and less strain on the compressor.

If the valve goes crook or is contaminated, performance drops off. Common signs include:

• Poor cooling at idle but better on the open road
• Vent temps hunting hot–cold, or the evaporator line frosting
• High side pressure too high, low side too low on gauges
• Hissing at the firewall and delayed cool-down
• After a compressor failure, metal debris affecting metering

As part of servicing, the TX valve isn’t a routine replacement item, but it should be tested any time the system is underperforming or opened up. On the 2015 Lancer, the valve sits at the evaporator in the HVAC case (behind the glovebox area). Replacement is straightforward for a qualified tech: recover refrigerant legally, remove the glovebox/trim for access, replace the valve and O-rings, torque to spec, evacuate thoroughly, and recharge with the correct R‑134a charge and specified PAG oil—follow the under‑bonnet label and the Mitsubishi service manual figures. Always fit a new receiver/drier (or desiccant bag) whenever the system is opened or if the compressor’s been replaced. For long life, have the air-con serviced every 2–3 years, keep the cabin filter fresh, and make sure the condenser’s clean so the TX valve isn’t fighting poor airflow. Done right, the Lancer’s TX valve will deliver chilly, reliable A/C for years without drama.

Does the 2015 Mitsubishi Lancer use a TX valve or an orifice tube?

It uses a TX valve. The Mitsubishi Service Manual (Lancer CF/CG, HVAC Group 55A) and Mitsubishi ASA parts catalogue specify a thermostatic expansion valve at the evaporator. Aftermarket catalogues also list an A/C expansion valve for this model.

How often should the TX valve be replaced on a 2015 Lancer?

It isn’t a scheduled replacement item. Replace it if diagnostics point to a sticking or restricted valve, if there’s contamination (especially after a compressor failure), or whenever the system’s opened and the valve shows corrosion or damage.

Where is the TX valve located on a 2015 Lancer?

At the evaporator inlet inside the HVAC case, typically accessed by removing the glovebox and surrounding trim. It’s an in‑cabin job, not under the bonnet.