Parts for your 2006 Ford Mondeo-Tx valve

2006 Ford Mondeo TX valve — what it does and when to sort it out

Technical sources confirm the 2006 Ford Mondeo (Mk3) uses a thermostatic expansion valve (TX valve) in its R134a air-conditioning system rather than an orifice tube. Ford’s workshop literature for Mondeo 2001–2007 (HVAC section), common parts catalogues from DENSO and Hella/Behr, and independent repair data (e.g., Haynes Mondeo manual for 2000–2007) all list a block-type TX valve mounted at the evaporator connections. So yes—this model is fitted with a TX valve.

On a 2006 Mondeo, the TX valve’s job is to meter refrigerant into the evaporator based on temperature and pressure, keeping superheat in the sweet spot so the cabin stays cool without flooding the compressor with liquid. When it’s healthy, the system cools quickly, stays consistent at the vents, and the compressor runs without protest. When it’s not, you’ll often get weak or erratic cooling, frost on the evaporator line at the firewall, odd hissing, or pressure readings that don’t stack up during a gauge test.

Replacement and servicing are straightforward in principle but best handled with the right gear. The valve sits at the evaporator’s inlet/outlet block at the bulkhead. Access may involve removing cowl trims and lines at the firewall, on some variants deeper HVAC access is needed. Because the system is under pressure and contains refrigerant, recovery, evacuation, and re-gassing should be done with proper A/C equipment.

• Always recover refrigerant, then disconnect the battery before starting.
• Replace the TX valve and all O-rings, lubricate new O-rings with the correct PAG oil.
• If the system’s been open or contaminated, fit a new receiver-drier (or condenser with integrated drier, as applicable).
• Purge moisture by deep vacuum, verify it holds vacuum, then recharge to the specified mass of R134a and add the correct oil amount.
• Afterwards, check for leaks, verify vent temps, and confirm steady superheat/pressure behaviour.

There’s no routine “service” for a TX valve—think of it as replace-on-condition. It’s worth checking it whenever the air-con’s performance drops, the system’s been opened, the compressor has failed (“black death”), or debris/moisture is suspected. Sticking to good A/C hygiene—clean condenser fins, correct refrigerant charge, and prompt leak repairs—helps the Mondeo’s TX valve live a long, quiet life under the bonnet.

Technical references: Ford Mondeo 2001–2007 Workshop Manual (HVAC/412-00), DENSO air-conditioning components catalogues for Mondeo Mk3 applications, Hella/Behr expansion valve listings, and Haynes Ford Mondeo (2000–2007) climate control sections.

Popular questions about 2006 Ford Mondeo TX valve

Where is the TX valve on a 2006 Mondeo?
It’s a block-style valve located at the evaporator connection on the bulkhead/firewall. You’ll typically access it from the engine bay by removing the air-con lines at the firewall area and, on some trims, lifting cowl plastics for room. Always recover refrigerant before cracking any fittings.

What are the classic symptoms of a failing TX valve?
Weak or intermittent cooling, vent temperatures that swing hot–cold, frost or icing near the evaporator inlet, and compressor cycling that seems off. A gauge set may show low evaporator pressure with poor cooling (underfeeding) or erratic pressures if the valve is sticking.

Should the TX valve be replaced during a compressor change?
It’s highly recommended if there’s any sign of debris or moisture. When a compressor fails, contaminants can jam the valve. Replacing the TX valve with new O-rings and fitting a fresh receiver-drier, followed by a proper flush (where appropriate), helps protect the new compressor and restore stable cooling.