Parts for your 2011 Honda Stream-Tx valve

2011 Honda Stream TX valve: what it is, where it lives, and how to look after it

Based on technical references — the Honda Factory Service Manual (HVAC section) for the RN6–RN9 Stream (2010–2012), Honda’s Electronic Parts Catalogue listing an “A/C Expansion Valve” for this model, and DENSO service literature describing Honda passenger vehicles of this era as TXV-type systems — the 2011 Honda Stream does use a thermal expansion valve (TX valve), mounted at the evaporator.

On the 2011 Stream, the TX valve meters R‑134a into the evaporator, reacting to temperature and pressure to hold the right superheat. That keeps the cabin cold at idle, avoids overfeeding the evaporator, and protects the compressor from liquid slugging. It’s a precise little metering device that makes the air con feel consistent whether it’s a school run or a summer motorway slog.

It’s not a routine “service item”, but it can wear or block with debris and desiccant dust. Signs it’s not happy include:

• Weak or fluctuating cooling, especially at idle
• Frosting at the evaporator/valve or hissing/whistling changes
• High-high or low-low gauge readings that don’t balance out
• Compressor short-cycling or line temperature swings

Replacement on a Stream is a proper A/C job. The refrigerant must be recovered, the lines at the firewall disconnected, and the valve swapped at the evaporator block. Best practice during this work includes:

• Always use new O-rings lubricated with the correct refrigerant oil
• Replace the receiver/drier or desiccant pack if the system has been opened
• Evacuate, leak-test, and recharge to the factory-specified R‑134a weight
• Use the specified PAG oil type and quantity, torque fittings to Honda specs

Because refrigerant handling is regulated in Australia and New Zealand, this is a licensed technician task. A quick performance test after re-gas (vent temps, pressure balance, and fan speeds) confirms the TX valve is doing its job. To keep things sweet between services, run the A/C for 10 minutes weekly, keep the condenser clear of road grime, and replace the cabin pollen filter on schedule so airflow across the evaporator stays strong.

If the Stream’s air con has turned a bit average, a specialist can pin it down quickly with pressure readings and a temperature probe at the evaporator — often the fastest way to tell if the TX valve is sticking or the issue lies elsewhere.

Popular questions

Does the 2011 Honda Stream use a TX valve or an orifice tube?
It uses a thermal expansion valve. Honda’s factory manual and parts catalogue list an expansion valve at the evaporator for the RN6–RN9 Stream. An orifice tube isn’t used on this model.

Where is the TX valve on a 2011 Honda Stream?
It’s mounted at the evaporator inlet/outlet block. Access is at the firewall connection to the HVAC case, practical replacement involves working at the line fittings in the engine bay and the evaporator block inside the dash area.

Should the drier be replaced when changing the TX valve?
Yes, it’s recommended any time the system is opened. Swapping the receiver/drier or desiccant pack helps protect the new valve and compressor from moisture and debris, and improves long-term reliability.