Parts for your 2014 Honda Accord-Tx valve

2014 Honda Accord TX valve: what it does and when to service it

Based on technical references including the Honda Accord (2013–2014) air conditioning section of the service manual, Honda’s electronic parts catalogue, and major OE supplier catalogues (DENSO and Four Seasons), the 2014 Honda Accord air-con system is built around a thermal expansion valve (TX valve), not an orifice tube. It’s a block-style TX valve mounted at the evaporator inlet, regulating refrigerant flow to match cabin load.

The TX valve’s job is to meter R‑134a into the evaporator while maintaining the right superheat. That balance keeps the evaporator cold without letting liquid refrigerant reach the compressor. When it’s working properly, the result is fast cool-down, stable vent temps, and solid performance at idle on hot Aussie and Kiwi days.

On a 2014 Accord, the TX valve isn’t a regular maintenance item, it’s replaced when it sticks, clogs with debris after a compressor issue, or shows clear test results pointing to a metering fault. Typical symptoms include erratic vent temperatures, frosting at the evaporator or lines, hissing that doesn’t settle, and unusual high/low gauge readings. Because the condenser on late-model Hondas often incorporates a desiccant bag, best practice during major A/C work is to replace the receiver/drier element and any contaminated components at the same time.

If a TX valve replacement is on the cards, a proper job looks like this: recover refrigerant, isolate and access the valve at the evaporator connections (usually via the engine bay/bulkhead and glovebox area), replace the valve with new O‑rings lightly lubricated with the correct PAG oil, pressure test, evacuate for moisture removal, and recharge to the specified weight. In Australia and New Zealand, this should be carried out by an ARCtick‑licensed or appropriately certified technician.

For longevity, a two‑yearly performance check is a good shout: leak inspection, cabin filter condition, condenser cleanliness, and an eye on charge weight and pressure behaviour. After any compressor failure or contamination, the TX valve and drier should be renewed, and the system cleaned as required, because a partially blocked valve will send Accord cooling performance downhill fast.

• Watch for: slow cool-down, temp swings at the vents, line frosting, and noisy cycling.
• Always use new O‑rings and the correct oil, weigh the charge, don’t guess.
• Replace the drier/desiccant whenever the system’s been open to air.

Popular questions

Does a 2014 Honda Accord have a TX valve or an orifice tube?
It uses a thermal expansion valve. Honda’s service information and parts listings for the 2013–2014 Accord specify a block-type TX valve at the evaporator inlet, not an orifice tube.

When should the TX valve be replaced on a 2014 Accord?
It’s not a routine service item. Replace it if diagnostics show a sticking or restricted valve, after compressor failure/contamination, or when metering faults cause unstable vent temps and abnormal pressure readings.

Where is the TX valve located on the 2014 Accord?
At the evaporator inlet near the firewall. Access typically involves the engine-bay bulkhead connections and removal of trim around the glovebox area to reach the valve body and lines.