Parts for your 2006 Honda Fit-Tx valve

2006 Honda Fit TX valve: what it does and when to service it

According to Honda service literature for the GD-series Fit/Jazz (Air Conditioning section) and the Honda electronic parts catalogue, the 2006 Honda Fit uses a thermostatic expansion valve (TX valve) at the evaporator inlet. Typical listings include Honda expansion valve part no. 80220‑SAA‑003 and equivalent DENSO catalogue entries, confirming the vehicle is TXV‑type rather than orifice‑tube.

On the 2006 Honda Fit, the TX valve meters liquid R‑134a into the evaporator, matching refrigerant flow to heat load. It keeps evaporator superheat in the sweet spot so vent temps stay cold without the core icing up. When cabin heat load rises (hot day, passengers, sun), the valve opens a touch more, when load drops, it closes back, smoothing pressures and protecting the compressor from liquid slugging.

There’s no scheduled maintenance for the TX valve itself. In normal service it’s a fit‑and‑forget item, but contamination, moisture, or compressor debris can make it stick or clog. Common signs owners may notice include:

• Weak or inconsistent cooling, especially cycling hot/cold at idle
• Frosting at the evaporator/TXV area or lines, or a hissing/whistling that wasn’t there before
• AC gauges showing abnormal superheat, low suction with normal/high head, or pressures not balancing after shutdown

Replacement is straightforward for an authorised technician: recover the refrigerant, remove the glovebox to access the HVAC case, unbolt the valve from the evaporator block, and renew all O‑rings. If the system’s been open or a compressor has failed, the receiver‑drier/desiccant should be replaced and the lines flushed where appropriate. A measured top‑up of PAG oil for component loss is wise. Pull a deep vacuum, then recharge with the specified R‑134a mass (check the under‑bonnet label, it’s around the mid‑400‑gram mark for this model). Correct bolt torque and scrupulously clean, lightly oiled O‑rings help prevent leaks.

Because handling refrigerant is regulated, the work should be done by an ARCtick‑licensed operator in Australia or an authorised refrigerant handler in New Zealand. For owners chasing reliability, pairing a new TX valve with a fresh cabin filter and ensuring the condenser is clean (no bugs or bent fins) helps the Fit’s small‑displacement system punch above its weight on scorching days.

Popular questions about the 2006 Honda Fit TX valve

Does a 2006 Honda Fit use a TX valve or an orifice tube?
It uses a thermostatic expansion valve. Honda’s GD‑series service information and the parts catalogue list an expansion valve at the evaporator inlet, confirming a TXV‑type system.

Where is the TX valve located on a 2006 Honda Fit?
It’s mounted at the evaporator inlet inside the HVAC case, accessed from behind the glovebox. The liquid and suction lines attach directly to the valve at the evaporator block.

When should the TX valve be replaced?
Replace it when there are TXV failure symptoms (poor/erratic cooling, frost at the valve, abnormal gauge readings), after compressor failure with debris in the system, or if the valve is confirmed restricted or stuck during diagnosis. Always replace O‑rings and evacuate/recharge to the specified mass.