Understanding TXV Failures: What Richmond Homeowners Should Know

If you’re located in Richmond, Glen Allen, Short Pump, Midlothian, or Henrico County, your AC system works overtime during Virginia’s hot summers. One of the most common—and often overlooked—sources of cooling issues is a failing Thermostatic Expansion Valve (TXV).

At West End Heating & Air, we help homeowners understand the components that keep their HVAC systems running efficiently, including when a TXV begins to fail.

What Is a TXV?

Most AC systems built in the last decade use a TXV to regulate how much refrigerant enters the evaporator coil. While more efficient than older piston-regulated systems, TXVs are more sensitive to debris, installation errors, and wear.

TXV failures are among the most frequent issues we diagnose in Central Virginia homes.

Common Signs of TXV Failures

1. TXV Failure – Closed Position

• No cooling

• Low suction pressure

• High head pressure

• Often caused by a loss of charge in the sensing bulb

2. TXV Failure – Wide Open Position

• Too much refrigerant flow

• Risk of liquid entering the compressor

• Potential compressor damage

3. TXV Failure – Partially Stuck Open

• Weak cooling

• Evaporator coil becomes refrigerant-starved

• Often caused by debris or a sticking pushpin

If you notice warm air, uneven cooling, or high humidity levels in your Richmond-area home, schedule an inspection right away.

Repair Options for TXV Issues

TXV Replacement

A full TXV replacement is labor-intensive and typically costs between $1,200 and $2,000, depending on your system.

AC Re-New Treatment

For partially stuck TXVs, adding AC Re-New (Zerol Ice) can help free internal components. Success rates average around 50%, and treatment costs $175.

Conversion to a Piston

If TXV failures continue, the TXV can be removed and replaced with a piston.

• Extremely reliable

• Reduces efficiency by about 1 SEER

• Prevents future TXV issues

This is a popular option for homeowners in Goochland, Powhatan, and Western Henrico looking for long-term reliability.

Schedule an HVAC Inspection in Richmond, VA

Whether you’re experiencing cooling issues, inconsistent temperatures, or unusual AC performance, West End Heating & Air can help diagnose system problems and recommend the right solution.

We proudly serve:
Richmond, Short Pump, Glen Allen, Henrico County, Midlothian, Mechanicsville, Ashland, Powhatan, and Central Virginia.