Parts for your 2007 Honda Elysion-Tx valve

2007 Honda Elysion TX-valve: fitted, what it does, and when to service it

On the 2007 Honda Elysion, a thermostatic expansion valve (TX-valve) is indeed used in the air-conditioning system. This is confirmed by Honda’s Elysion Service Manual (RR1–RR4, HVAC section), Honda’s Electronic Parts Catalogue listing “Expansion Valve, Front” and, on dual A/C models, “Expansion Valve, Rear,” as well as DENSO’s A/C components catalogues that specify a TEV/TXV for this platform. So the TX-valve is relevant to anyone servicing or troubleshooting the Elysion’s climate control.

The TX-valve meters liquid R‑134a into the evaporator based on outlet temperature and pressure, keeping superheat in the sweet spot. That control is what gives stable cabin temps at idle and on the open road, minimises compressor load, and helps prevent evaporator freeze-up. Many Elysions with rear air feature a second TX-valve at the rear evaporator for even cooling across all three rows.

When the TX-valve starts to play up, owners often notice weak cooling at idle, air that swings from too warm to too cold, frost build-up on the evaporator or pipes, or a hissing/whistling at the dash. A stuck-closed valve can starve the evaporator, a stuck-open one can flood it. Contaminants from a failing compressor or moisture in the system are common culprits.

• Best practice during replacement: recover the refrigerant, replace the receiver/drier or desiccant pack, renew the O‑rings, and add the correct PAG oil for the Elysion’s system.
• Always evacuate, leak-test, and recharge to the under‑bonnet label spec, don’t guess the charge, especially on dual A/C models.
• If a compressor has failed, flush the lines and condenser (or replace a non-flushable condenser) before fitting a new TX-valve.

Where’s it located? The front TX-valve mounts at the front evaporator, typically behind the dash near the heater box. On dual A/C variants, the rear TX-valve sits by the rear evaporator assembly in the left rear quarter area. Access time varies, so budgeting for trim and dash removal on the front circuit is sensible.

1. Confirm operation with pressure readings and temperature drop across the valve before condemning it.
2. Use genuine or high-quality equivalent valves, cheap units can hunt or stick.
3. In Australia and New Zealand, A/C work must be carried out by a licensed technician—handling refrigerant without a licence isn’t on.

Look after the system with periodic performance checks and keep the cabin filter fresh, both help the TX-valve do its job and keep the Elysion cool on scorching summer runs.

Popular questions about the 2007 Honda Elysion TX-valve

Where is the TX-valve on a 2007 Honda Elysion?
It’s mounted at the evaporator. The front valve is behind the dash at the HVAC case, dual A/C models add a rear valve by the rear evaporator in the left rear quarter. Access generally requires trim or dash work, so allow shop time.

Do all Elysions have two TX-valves?
No. Single A/C models have one TX-valve up front. Elysions equipped with rear air have a second valve at the rear evaporator to balance cooling for the back rows. Check the build plate and interior controls—rear fan/temp controls usually indicate dual A/C.

When should the TX-valve be replaced?
There’s no fixed interval. Replace it when diagnostics point to a metering fault, after a compressor failure, or whenever the system is opened for major work and there’s evidence of contamination. Always pair the job with a new receiver/drier and a precise recharge.