Parts for your 2017 Ford Everest-Tx valve

2017 Ford Everest tx-valve — what it does and how to look after it

Referencing Ford’s Workshop Manual (WSM) for the Everest/Ranger platform (2015–2018, Climate Control sections 412‑00/412‑01) and Ford/Motorcraft parts catalogues, the 2017 Ford Everest uses a thermostatic expansion valve (tx-valve) on the rear auxiliary air‑conditioning circuit in models fitted with rear climate control. The front circuit uses a fixed orifice tube. That means a tx-valve is definitely relevant on many 2017 Everests sold in Australia and New Zealand, particularly mid to high trims with rear A/C.

The tx-valve’s job is to meter refrigerant into the rear evaporator based on temperature and pressure at the outlet, keeping the evaporator at the sweet spot of superheat. Done right, it delivers quick cool-down for the third row, stable cabin temps, and protects the compressor from liquid slugging. Unlike a fixed orifice tube, a tx-valve actively adjusts to load and ambient changes, so rear-seat comfort stays consistent on scorching summer days or cool, damp mornings.

It’s not a scheduled service item, but it does deserve attention when chasing poor rear cooling or uneven temps. Common tell-tales of a tx-valve issue include weak or no cooling in the rear zone, intermittent cold/hot swings, frost or heavy sweating on the rear lines, and odd hissing. On gauges you’ll often see low rear suction pressure with a normal to high discharge and a rear evaporator that’s either starving or icing.

When replacement’s on the cards, the Everest’s rear tx-valve typically lives at the rear evaporator, behind the right‑hand rear quarter trim. Because opening the system is required, an ARCtick‑licensed A/C technician should recover the refrigerant, swap the valve, renew all O‑rings, and replace the receiver‑drier/desiccant. If there’s evidence of compressor debris, a thorough flush of the lines and rear evaporator is wise. The system should then be evacuated to deep vacuum, refilled with the correct PAG oil spec and the refrigerant charge shown on the under‑bonnet label (AU/NZ 2017 Everests are typically R‑134a), and leak‑tested.

• Always insulate and correctly position the tx-valve sensing bulb (where fitted) so it reads true evaporator outlet temperature.
• Use new sealing washers/O‑rings and torque fittings to Ford WSM specs to prevent leaks.
• If rear cooling is weak but front is fine, check rear blower operation and airflow (blocked rear cabin filter/ducting) before condemning the valve.

Popular questions

Does every 2017 Ford Everest have a tx-valve?
Not all of them. The front A/C circuit uses a fixed orifice tube. The tx-valve is fitted to vehicles with the auxiliary rear A/C system, which most AU/NZ mid and high trims have. If the vehicle has rear climate controls and rear quarter A/C lines, it’ll almost certainly have a rear tx-valve.

Where is the tx-valve on a 2017 Everest?
It’s mounted at the rear evaporator, usually behind the right‑hand rear quarter interior trim. Access involves removing the trim and carefully exposing the rear HVAC module. Because the system must be depressurised, this is a job for a licensed A/C technician.

Can a sticking tx-valve be cleaned instead of replaced?
If it’s contaminated or sticking, cleaning is hit‑and‑miss. Best practice is to replace the valve, renew the drier/desiccant, and flush if debris is present. That restores proper metering and helps protect the compressor and evaporators long term.