Parts for your 2002 Ford Mondeo-Tx valve

2002 Ford Mondeo tx-valve: is it fitted, and what should owners know?

For the 2002 Ford Mondeo (Mk3), a tx-valve (thermostatic expansion valve, TXV) isn’t used. Technical documentation identifies the Mondeo’s air-con as a CCOT (cycling-clutch orifice-tube) system, which uses a fixed orifice tube as the expansion device and an accumulator on the low side, not a TXV with a receiver–drier.

Technical sources that confirm this setup include:

• Ford Workshop Manual (TIS) 2001–2007 Mondeo, Section 412-02 Climate Control – refrigerant circuit description shows a fixed orifice tube and accumulator system.
• Haynes Ford Mondeo 2000–2007 manual – HVAC chapter describes the CCOT layout and makes no provision for a TXV.
• Aftermarket A/C catalogues from major suppliers (Hella/Behr, MAHLE, Delphi, Four Seasons) list an orifice tube for the Mk3 Mondeo rather than a TXV.

Why no tx-valve? Ford engineered the Mk3 Mondeo with the widely used CCOT approach. A fixed orifice tube meters refrigerant based on pressure and compressor cycling, delivering reliable cabin cooling with fewer moving parts and lower cost. In this layout, an accumulator protects the compressor by storing excess refrigerant and trapping moisture and debris—jobs that, in TXV systems, are handled alongside a receiver–drier.

If someone’s been told their 2002 Mondeo needs a “tx-valve,” it’s almost certainly a mix-up. The actual expansion device is the orifice tube, typically located in the liquid line. When A/C performance drops (warm air at idle, poor cooling on hot days, or rapid compressor cycling), common Mondeo culprits include:

• Blocked orifice tube (debris from compressor wear)
• Saturated or aged accumulator/drier
• Low refrigerant charge from small leaks at O-rings, condenser, or hose crimps
• Weak condenser airflow (fans or fins clogged with bugs)

Servicing tips for Australia and New Zealand: any work that opens the A/C circuit (replacing the orifice tube or accumulator) requires proper refrigerant recovery and evacuation. Use an ARCtick-licensed (AU) or suitably certified (NZ) technician. Fit new O-rings lubricated with the correct PAG oil, evacuate the system thoroughly, and recharge to the exact R134a mass shown on the under‑bonnet label. If metal debris is present, plan for a deeper clean: flush lines where approved, replace the accumulator, orifice tube, and consider a compressor and condenser depending on contamination.

Bottom line: a tx-valve isn’t part of the 2002 Mondeo’s design. Focus maintenance on the orifice tube, accumulator, charge level, and leak integrity for ice-cold, drama-free A/C under the Aussie or Kiwi sun.

• Popular questions about the 2002 Ford Mondeo tx-valve

Does a 2002 Ford Mondeo have a tx-valve?
No. The Mk3 Mondeo uses a fixed orifice tube with an accumulator (CCOT system), not a thermostatic expansion valve.

Where is the expansion device on a 2002 Mondeo?
The expansion device is the orifice tube, commonly fitted in the liquid line. Access and exact position vary by engine and line routing, a licensed A/C tech can extract it with the correct puller.

Can a tx-valve be retrofitted to a 2002 Mondeo?
It’s not recommended. Converting from CCOT to TXV would require major component and control changes. Proper diagnosis, orifice tube/accumulator replacement, and correct charging restore performance without redesigning the system.