Goodman Thermal Expansion Valve for 3 Ton (TXV-V36)
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Key features
- Sized for 3-ton (36,000 BTU) Goodman and Amana compatible split systems
- Meters refrigerant flow dynamically based on suction line superheat conditions
- Replaces worn, failed, or fixed-orifice metering devices in existing systems
- Designed to meet Goodman OEM fit specifications for compatible coil and air handler models
- Supports accurate superheat and subcooling tuning after installation
- Required upgrade when converting a piston-metered system to TXV for coil matching compliance
About this system
The Goodman TXV-V36 is a 3-ton thermal expansion valve designed as a direct replacement or upgrade component for compatible Goodman and Amana split-system air conditioners and heat pumps. A TXV precisely meters refrigerant flow into the evaporator coil based on real-time suction line conditions, replacing the fixed orifice or piston metering devices found in many entry-level systems. For a 3-ton system, getting that metering right is critical: too much refrigerant floods the coil and risks compressor slugging, too little starves it and kills efficiency. Swapping in a TXV can restore or improve system performance when an existing metering device is worn, mis-sized, or causing erratic superheat readings.
This part suits homeowners and technicians looking to maintain or upgrade an existing Goodman 3-ton system without replacing the entire unit. It is also the correct choice when a system is being converted from a fixed-orifice setup to TXV control to meet the matching requirements of a new high-efficiency coil or outdoor unit. Because the TXV is a relatively small component in the refrigerant circuit, its installation demands careful brazing, proper refrigerant recovery and recharge, and a superheat or subcooling check afterward. This is not a DIY-friendly part and should be installed only by an EPA 608-certified technician.
The Goodman TXV-V36 is a straightforward, competitively priced replacement valve for technicians maintaining 3-ton Goodman or Amana systems. It does the job it is designed for when properly installed and charged, but like all Goodman components, its long-term performance depends heavily on the quality of the installation and refrigerant work surrounding it. It is not a performance upgrade in itself; it is a precision metering component that is only as good as the system it is placed in.
Overall score is the average of the five ratings above.
What we like
- Priced noticeably below OEM TXV options from Carrier, Trane, and Lennox for comparable tonnage
- Correct OEM fit for Goodman and Amana 3-ton coil and air handler combinations
- Enables accurate superheat control, which can improve efficiency over a worn or fixed-orifice metering device
- Widely available through Goodman distributors, reducing wait times for repair technicians
- Straightforward to identify and source as a Goodman-branded part for an existing Goodman system
Trade-offs
- Installation requires EPA 608 certification, refrigerant recovery, brazing, and a proper recharge, adding meaningful labor cost
- Goodman's overall brand reliability track record shows evaporator coil leaks and refrigerant circuit issues in owner reviews, meaning a replaced TXV may not be the only refrigerant-side repair needed
- No efficiency or capacity rating to evaluate independently since performance is entirely system-dependent
- Compatibility must be confirmed against the specific Goodman coil and outdoor unit model before ordering
What homeowners and pros say about Goodman
Homeowners who have gone through a Goodman system repair often have strong opinions about the brand’s value proposition. On Google dealer reviews, Goodman averages around 3.8 out of 5 stars across multiple locations, with affordability consistently cited as the main reason buyers chose the brand in the first place. On ConsumerAffairs, the score drops to roughly 2.5 out of 5, though that platform draws a disproportionate share of frustrated owners. The complaints that appear repeatedly point to rising repair costs after roughly year 7, which is worth keeping in mind when deciding whether a component-level fix on an aging system makes financial sense.
HVAC technicians tend to have a more nuanced view. The documented failure modes on Goodman systems include dual-run capacitors (a common and relatively low-cost fix in the 300 to 600 dollar range), evaporator coil leaks that show up in a meaningful share of owner reports, and compressors that average 10 to 14 years rather than the 15 to 20 years typical of premium brands. Refrigerant leaks within the first year also appear in a minority of owner accounts, usually traced back to install or charge issues rather than a defective part. For a TXV replacement specifically, technicians consistently emphasize that the valve is only one piece of a refrigerant circuit that needs to be in good shape overall. Replacing the TXV on a system with an aging coil or questionable refrigerant history may solve the immediate symptom without addressing the underlying condition.
Sources: ConsumerAffairs Goodman owner reviews, AHRI Directory of Certified Product Performance, U.S. DOE appliance and equipment efficiency standards, Goodman product specification sheets.
How it compares
| Brand | Comparable model | SEER2 | Stage | Price position |
|---|---|---|---|---|
| Goodman | TXV-V36 | N/A | N/A (component part) | Value pick |
| Carrier | Bryant/Carrier OEM TXV for 3-ton evaporator coils (CAUF/CAPF series compatible) | N/A | N/A (component part) | Priced higher than Goodman TXV, typically 20 to 30 percent more through Carrier distributors |
| Trane | Trane OEM TXV for 3-ton coil applications (compatible with Trane 4TXCB/4PXCB coil series) | N/A | N/A (component part) | Generally priced above Goodman, reflecting Trane's premium parts positioning |
| Lennox | Lennox OEM TXV for 3-ton coil applications (compatible with CBX/CH33 series coils) | N/A | N/A (component part) | Among the highest-priced OEM TXV options at 3-ton, consistent with Lennox's premium parts market |
Competitor rows are comparable single-stage units at similar efficiency; price is relative position, not a quote.
Questions about this system
Will the TXV-V36 fit my specific Goodman air handler or coil model?
Compatibility depends on your exact coil and air handler model numbers. Always cross-reference the TXV-V36 against Goodman's published parts compatibility guide or confirm with your distributor before purchasing. Installing the wrong TXV can cause chronic superheat problems or refrigerant circuit damage.
Can I install this TXV myself to save on labor costs?
No. Replacing a TXV requires recovering the existing refrigerant charge, brazing the new valve into the refrigerant circuit, pressure testing, evacuating the system, and recharging to the correct specification. All of these steps require EPA 608 certification and specialized equipment. Attempting this without proper training risks refrigerant release, coil damage, and compressor failure.
How do I know if the TXV is actually the part that needs replacing in my system?
Common signs of a failing TXV include erratic suction pressure, superheat readings well outside the target range, icing on the evaporator coil, or poor cooling performance that cannot be explained by refrigerant charge alone. A technician should perform a full system diagnostic, including superheat and subcooling measurements, before concluding the TXV is the root cause.
Goodman has a reputation for refrigerant leaks. Is replacing the TXV going to solve that?
Not necessarily. Goodman owner reviews document evaporator coil leaks as a recurring issue that is separate from the metering device. A faulty or failed TXV can cause flooding or starvation of the coil, but actual coil leaks are a different failure mode. Your technician should inspect the coil and refrigerant connections thoroughly before and after the TXV replacement.
Does this part come with a warranty, and does replacing it affect my system warranty?
Goodman typically warranties replacement parts for a defined period, but warranty terms vary and should be confirmed at the time of purchase. Using a non-OEM TXV on a system still under Goodman's equipment warranty could affect that warranty, so using the Goodman-branded TXV-V36 is the safer choice for systems still within their coverage period.
Specifications
| Cooling capacity | 3 Ton |