Parts for your 2010 Honda Accord-Tx valve

2010 Honda Accord TX valve: what it does and when to service it

Technical sources confirm the 2010 Honda Accord uses a thermostatic expansion valve (TXV), not an orifice tube. The Honda Service Manual for the 2008–2012 Accord describes an expansion valve mounted at the evaporator, and Honda’s genuine parts catalog lists an “Expansion Valve (Front),” commonly referenced as P/N 80221-TA0-A01, for this model year. Major aftermarket catalogs (Denso, Four Seasons) also specify a TXV for the 2010 Accord’s R‑134a air-conditioning system.

On the 2010 Accord, the TX valve controls how much liquid refrigerant is metered into the evaporator, based on temperature sensed at the outlet. By keeping the evaporator just superheated, it avoids ice-up, maximises cooling at idle and cruise, and helps protect the compressor from slugging. It’s the brains at the cold end of the A/C loop, constantly balancing flow so cabin temps stay consistent even as the weather and engine speed change.

This valve isn’t a routine service item, but it becomes a hot topic if the system shows weak or erratic cooling, frost forming on the evaporator or suction line, or odd high/low pressure readings. Any time the A/C circuit is opened—say, for a leaking hose or condenser—best practice is to replace the sealing O‑rings, renew the desiccant (the Accord uses a serviceable desiccant bag in the condenser on many variants), and ensure the TXV isn’t sticking from debris or moisture. If there’s been a compressor failure or contamination, the TXV should be replaced, the lines flushed where permissible, and the receiver/desiccant renewed.

• Common TXV trouble signs: slow cooldown, fluctuating vent temps, frosting, hissing at the valve, or pressure readings that don’t stabilise.
• Typical location: at the evaporator housing, generally accessed from the passenger side behind the glovebox area.

When replacing the TX valve on a 2010 Accord, recovery of R‑134a, clean removal of the evaporator connections, and correct reassembly with new, lightly PAG‑oiled O‑rings are key. Avoid overtightening the valve fasteners, follow workshop torque specs. After reassembly, evacuate the system to deep vacuum, verify it holds vacuum, then recharge to the exact mass on the under‑bonnet label with the correct PAG oil type and quantity. A post‑service check should confirm stable low and high side pressures, steady vent temps, and no leaks (nitrogen pressure test and an electronic leak check are ideal).

Because handling refrigerant is regulated, A/C work should be carried out by a licensed technician (ARCtick in Australia, approved handlers in New Zealand). That keeps the car compliant, the environment protected, and the cabin comfortably cool.

FAQs

Does a 2010 Honda Accord have a TX valve or an orifice tube?

It uses a thermostatic expansion valve at the evaporator. This is shown in the 2008–2012 Accord HVAC service information and reflected in Honda’s parts listings (Expansion Valve, front). Most reputable aftermarket catalogues also specify a TXV for this model.

Where is the TX valve located on a 2010 Accord?

It’s fitted at the evaporator housing, typically accessed from the passenger side behind the glovebox area. The refrigerant lines connect through the firewall to the valve, which meters flow into the evaporator core.

Can a sticking TX valve be cleaned, or should it be replaced?

If contamination is the cause, cleaning won’t reliably restore metering accuracy. Replacement is recommended, along with renewing the desiccant and flushing the system (where permitted) after any compressor damage. That prevents repeat faults and protects the new components.