Parts for your 2019 Honda Cr-v-Tx valve

2019 Honda CR‑V TX‑Valve: what it does and when to service it

Based on Honda technical literature and parts catalogues, the 2019 Honda CR‑V is built with a thermal expansion valve (often called a TX valve or TXV) at the evaporator. Honda’s Service Information for the RW/RT CR‑V (HVAC – A/C System Description and Operation) describes an expansion valve regulating refrigerant flow into the evaporator, and the Honda Genuine Parts catalogue lists an “Expansion Valve (A/C)” for this model year (commonly referenced under the evaporator/air conditioner unit section, with superseding Honda part numbers specific to the VIN and market). That makes the TX‑valve directly relevant to A/C performance on any 2019 CR‑V.

The TX‑valve’s job is simple but crucial: it meters refrigerant into the evaporator to keep the evaporator pressure and temperature in the sweet spot. It responds to evaporator outlet conditions, opening up when more cooling is needed and trimming flow when it’s not. Done right, the cabin stays comfortably cool without the evaporator icing up or the compressor working harder than it should.

There’s no routine “maintenance” for a TX‑valve, but it depends on a clean, correctly charged system. Owners can help by replacing the cabin filter on schedule, keeping the condenser clean of bugs and debris, and running the A/C regularly year‑round to circulate oil and protect seals. If the system is opened for any reason, Honda procedures typically call for new O‑rings and, where applicable, servicing the condenser’s desiccant element. Always use the refrigerant type and charge weight shown on the under‑bonnet label.

When might a TX‑valve need replacing? Telltales include weak or intermittent cooling, vent temps that swing hot‑cold, frost at the evaporator or lines, or pressure readings that suggest a restriction. After a compressor failure, contamination can clog the valve, so many workshops replace it as part of the repair. On the 2019 CR‑V the valve is mounted at the evaporator on the HVAC case, so access usually involves dash/glovebox area work and disconnecting the A/C lines at the firewall. Because refrigerant handling requires the proper licence in Australia and New Zealand, this is a job for an A/C‑accredited technician with recovery, vacuum, and re‑charge equipment.

• Best practice during replacement: fit new O‑rings, pull a deep vacuum and verify it holds, add the correct PAG oil amount for parts replaced, and charge to the exact weight.
• If cooling is fine but there’s a suspected TX‑valve noise, confirm pressures and airflow before condemning the valve—noisy operation can also point to low charge or condenser airflow issues.

Popular questions

Does the 2019 CR‑V use a TX‑valve or an orifice tube?
It uses a TX‑valve at the evaporator. This is documented in Honda’s HVAC system description and is shown in the OEM parts catalogue for 2019 CR‑V models. The valve modulates refrigerant flow for stable evaporator temperature and efficient cooling.

Where is the TX‑valve located on a 2019 CR‑V?
It’s fitted on the evaporator assembly inside the cabin, mounted to the HVAC case behind the dash on the passenger side. The refrigerant lines connect through the firewall to this point. Access typically requires glovebox/dash trim removal and line disconnection.

When should the TX‑valve be replaced?
Replace it if diagnostics point to a restriction or control fault (erratic vent temps, icing, abnormal pressure readings), or whenever the system is contaminated—such as after a compressor failure. It’s also commonly renewed during major A/C overhauls along with O‑rings and the condenser desiccant, following Honda procedures.