Parts for your 2008 Honda Cr-v-Tx valve

2008 Honda CR‑V TX Valve — What it does and when to replace it

Based on Honda service information for the RE‑series CR‑V (2007–2011, HVAC section), the Honda electronic parts catalogue, and DENSO/Honda air‑conditioning guides, the 2008 Honda CR‑V is fitted with a thermostatic expansion valve (TX valve or TXV) at the evaporator—not an orifice tube system. That means “tx‑valve” is absolutely relevant to this model.

The TX valve meters liquid R‑134a into the evaporator, responding to evaporator outlet temperature and pressure so the system hits a sweet spot: maximum cooling without flooding the compressor. When it’s healthy, cabin temps stabilise quickly, the compressor cycles sensibly, and the glass demists fast on a cold, damp morning.

Owners usually don’t need to replace a TXV on a schedule—it’s a fit‑and‑forget part until symptoms pop up. On a 2008 CR‑V, a crook or contaminated valve often shows up as:

• Warm air at idle but cooler when driving, or temperatures that swing hot–cold
• High or low system pressures, or frosting/icing on the evaporator line
• Hissing at the firewall and a compressor that short‑cycles

If a compressor has failed, the system’s been left open, or there’s debris/moisture in the lines, a TXV can stick or clog. In those cases, replacing the valve is smart insurance alongside flushing, new O‑rings, and a fresh desiccant pack (the CR‑V’s receiver/drier is integrated with the condenser on this generation).

Service tips for a 2008 CR‑V TX valve:

• Have an ARCtick‑licensed A/C tech recover the refrigerant, then access the TXV at the evaporator connections near the firewall and behind the dash.
• Replace O‑rings, lightly lubricate with the correct PAG oil (ND‑Oil 8/PAG 46 for most Honda units), and torque fittings to spec from the Honda manual.
• Evacuate for at least 30 minutes to boil off moisture, then recharge to the exact weight on the under‑bonnet label with R‑134a.
• Fit a new cabin pollen filter and keep the condenser face clean—both help the TXV do its job.

Bottom line: the TXV is the brains of the CR‑V’s air‑con. If cooling is inconsistent, get pressures checked and the valve assessed before throwing parts at the problem.

Popular questions

Where is the TX valve on a 2008 Honda CR‑V?
It’s mounted at the evaporator, where the A/C lines pass through the firewall on the passenger side. Access typically involves working under the dash and disconnecting the lines at the engine bay side. A tech will recover gas first, then remove the valve from the evaporator block.

What are common signs the TXV is failing on this model?
Erratic cabin temps, poor cooling at idle, frost on the low‑pressure line, and odd pressure readings on gauges. You might also hear hissing at the firewall and notice the compressor cycling rapidly. These can also point to low charge or a blocked condenser, so proper diagnosis matters.

Should the receiver/drier be replaced when changing the TX valve?
Yes, if the system’s been opened or contamination is suspected. On the 2008 CR‑V the desiccant is part of the condenser assembly, many techs replace the desiccant bag or the condenser itself during major A/C work to protect the new TXV and compressor.