Parts for your 2006 Honda Accord-Tx valve

2006 Honda Accord TX-valve: what it does and when to sort it

Yes, the 2006 Honda Accord runs a thermal expansion valve (TX-valve), not an orifice tube. Technical sources that confirm this include the Honda Accord 2003–2007 Factory Service Manual (HVAC section referencing “Expansion Valve Removal/Installation” at the evaporator), Honda’s electronic parts catalogue listing an “Expansion Valve” for the 2006 model year (commonly referenced under part family 80220-***), and mainstream component catalogues from OEM and aftermarket suppliers that specify a block-type TX-valve for this generation Accord.

The TX-valve’s job is to meter R‑134a into the evaporator based on temperature and pressure, keeping the evaporator in its sweet spot so the cabin gets properly cold without icing up. On the 2006 Accord, the valve sits at the evaporator connection, typically within or at the heater/evaporator case where the A/C lines meet the unit. It constantly trims refrigerant flow so the system stays efficient across stop‑start traffic, open‑road cruising, and those muggy summer days.

There’s no scheduled maintenance just for the TX-valve, but a few habits keep it happy:

• Run the A/C regularly to circulate oil and keep internal parts from sticking.
• Replace the receiver–drier/desiccant bag whenever the system is opened to air, or after a compressor failure.
• Keep the condenser clean so pressures stay in the right range.

When to replace the TX-valve? Think about it if there’s weak or wildly inconsistent cooling, frost right at the valve/evaporator inlet, rapid cycling, odd hissing plus pressure readings that don’t make sense, or contamination after a compressor event. A simple regas won’t fix a sticking or restricted valve.

Replacement is a professional job in Australia and New Zealand because refrigerant recovery is regulated. The process is straightforward for a licensed tech: recover the R‑134a, open the lines at the valve, swap the TX-valve, renew O‑rings, evacuate to deep vacuum to boil off moisture, leak-test, then recharge by weight with the specified oil balance. Access on the Accord can be fiddly depending on trim, expect some trim/glovebox work to reach the evaporator connections. It’s wise to inspect the condenser’s desiccant and consider a drier service at the same time to protect the new valve.

Done right, a fresh TX-valve brings back crisp vent temps, better fuel efficiency from shorter compressor run time, and fewer foggy-window dramas on wet winter mornings.

• Technical references (no outbound links): Honda Accord 2003–2007 Factory Service Manual, HVAC/Expansion Valve procedures, Honda EPC listings for 2006 Accord “Expansion Valve”, OEM/aftermarket catalogues (e.g., DENSO, Four Seasons, Nissens) specifying a TX-valve for 2006 Accord.

Popular questions

Does the 2006 Accord use a TX-valve or an orifice tube?
It uses a thermal expansion valve. Honda’s factory service information for the 2003–2007 Accord shows an expansion valve at the evaporator, and parts catalogues list it for all main 2006 variants. No fixed orifice tube is specified for this model.

Where is the TX-valve on a 2006 Honda Accord?
It’s mounted at the evaporator connection, typically at the heater/evaporator case where the A/C lines enter the cabin area. Access usually involves working behind the glovebox or at the firewall connection points, depending on the exact trim and right/left-hand drive layout.

Will a regas fix a sticking TX-valve?
Not if the valve is the culprit. A regas only restores charge. If the TX-valve is restricted or stuck, the system needs proper diagnosis and the valve may need replacing, along with new O‑rings, evacuation, and an accurate recharge. In AU/NZ, make sure a licensed A/C technician carries out the work due to refrigerant handling rules.