Parts for your 2007 Honda Stream-Tx valve

2007 Honda Stream TX valve fitment, purpose and service advice

Based on technical references, the 2007 Honda Stream is fitted with a thermostatic expansion valve (TX valve/TXV). Honda’s Electronic Parts Catalogue (RN6–RN9 chassis, 2006–2014) lists a “valve assy., expansion” at the evaporator, and the Honda service manual A/C schematics for this platform show a block-type TXV mounted at the evaporator inlet behind the dash. Major OE supplier catalogues (e.g., DENSO) also list a direct-fit expansion valve for the 2007 Stream, which corroborates factory fitment. That means a TX valve is relevant for diagnostics and servicing on this model.

On the 2007 Honda Stream, the TX valve meters refrigerant into the evaporator based on superheat, keeping the cabin cool while protecting the compressor from liquid slugging. By adjusting flow with changing load and ambient conditions, it helps deliver steady vent temps at idle and on the open road, and reduces icing risks.

When servicing the air-con, the TX valve is usually a “don’t touch unless needed” item, but it becomes a suspect if there’s weak cooling, noticeable temperature swings, or frost building right at the evaporator inlet. A valve stuck too far closed can cause low suction pressure and warm air, stuck too far open can cause high suction pressure and lukewarm vents. Contamination from a failing compressor or moisture in the system can also jam the valve.

Replacement is straightforward for a trained tech but involves dash-side access. Expect to recover the refrigerant, remove the glovebox/trim to reach the evaporator connections, unbolt the block-type TXV, and renew all O-rings. After refit, the system must be evacuated, leak-tested, and recharged by weight to the under-bonnet label. Use the correct oil (Honda ND-OIL8/PAG 46 equivalent) in the proper amount when components are replaced.

• Good practice: if the system’s been opened or a compressor has failed, replace the TX valve and the desiccant (often a serviceable bag in the condenser on many Hondas) to keep debris and moisture at bay.
• Preventative steps: keep the cabin filter fresh, ensure condenser fins are clean and the radiator fans cut in as they should. Poor airflow can mimic TXV faults.
• Diagnosis tip: pressure readings plus line temperature checks at the firewall help separate TXV issues from low refrigerant or weak compressor output.

A quality TX valve, fitted with new O-rings and torqued correctly, should last for years. When in doubt, rely on proper gauges, a vacuum/charge by weight, and OEM-spec parts to keep the Stream’s air-con crisp through Aussie and Kiwi summers.

Popular questions

Does the 2007 Honda Stream use a TX valve or an orifice tube?
This model uses a block-type thermostatic expansion valve at the evaporator inlet, not a fixed orifice tube. That design is typical for Honda’s compact MPV and Civic-based platforms of the era, providing better control of evaporator superheat across varied driving and climate conditions.

Where is the TX valve located on a 2007 Honda Stream?
It’s mounted at the evaporator inlet, behind the dash on the passenger side. From the engine bay, the two A/C lines enter the firewall, inside at that junction sits the block-style TXV secured with bolts and sealed by O-rings.

When should the TX valve be replaced on a 2007 Honda Stream?
Replace it if it’s proven faulty (stuck, leaking, or contaminated), whenever the compressor has suffered an internal failure, or if the system has been left open to atmosphere for a period. Pair the job with a desiccant replacement and a correct evacuate-and-recharge to restore reliability.