Parts for your 2002 Ford Focus-Tx valve

2002 Ford Focus TX Valve: What’s Fitted and What Isn’t

For the 2002 Ford Focus, a TX valve (thermal expansion valve) isn’t fitted or used. This model runs a Cycling Clutch Orifice Tube (CCOT) air‑conditioning system that meters refrigerant with a fixed orifice tube and controls cooling by cycling the compressor. There’s also an accumulator on the low side, not a receiver‑drier as seen on many TX‑valve systems.

Technical sources back this up clearly. The Ford Focus 2002 Workshop Manual (Section 412‑00 Climate Control – Description and Operation) describes a fixed orifice tube in the liquid line and an accumulator, with compressor cycling to manage evaporator pressure, there’s no TX valve in the parts catalogue or procedures. The Haynes Ford Focus 2000–2011 Repair Manual outlines orifice tube service steps, not TX‑valve servicing. Industry databases such as Mitchell1/ALLDATA for 2002 Focus list the metering device as a fixed orifice tube and provide replacement procedures for the tube and accumulator only. Motorcraft parts listings for this model show the orifice tube and accumulator components but no TX‑valve option.

Why no TX valve on this Focus? Ford engineered the Mk1 Focus with the CCOT layout for:

• Proven reliability and lower cost across large production runs.
• Simple, consistent performance suited to varied Aussie and Kiwi climates.
• Easier servicing: a fixed orifice tube and accumulator are quick to diagnose and replace.

What should owners service instead of a TX valve?

• Orifice tube: can clog with compressor debris, replace if contamination is found.
• Accumulator: best replaced whenever the system is opened, or if moisture/contamination is suspected.
• System hygiene: keep the condenser clean, check drive belt condition/tension, and replace the cabin pollen filter so airflow over the evaporator stays strong.
• Refrigerant and oil: charge with the specified R‑134a amount and correct PAG oil type as shown on the under‑bonnet label, evacuation and charging should be done by a licensed A/C technician.

If cooling is weak, the compressor short‑cycles, or there’s frost on lines, the fix is rarely a “TX valve” on this car. Instead, look for low refrigerant charge, a blocked orifice tube screen, poor condenser airflow, or an accumulator that’s past its best. A quick inspection by an auto A/C specialist under the bonnet will usually pinpoint it.

• Does a 2002 Ford Focus have a TX valve?
  No. It uses a fixed orifice tube with a cycling compressor and an accumulator. There’s no TX‑valve in the system or parts listings for this model year.
• Where is the metering device on a 2002 Focus, and how is it replaced?
  The fixed orifice tube sits in the liquid line leading to the evaporator in the engine bay. Replacement involves recovering the refrigerant, separating the line, extracting the tube with a puller, fitting new O‑rings, then evacuating and recharging. Always have an authorised A/C technician handle the gas work.
• What are signs the orifice tube is blocked?
  Weak cabin cooling, rapid compressor cycling, low low‑side and high high‑side pressures, line frosting, and metal or black sludge on the tube’s screen when removed. Debris often points to compressor wear, so further system cleaning and parts inspection may be needed.