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HVAC Drier and TXV Replacement

How do you know it’s time to replace your TXV valve and drier? You might start to suspect a faulty part if you notice your system is freezing over, or your heating and cooling bills spike one month. If the TXV and drier are the cause, it’s time for a replacement.

Time for a Drier and TXV Replacement

Inside your heat pump or air conditioning system, there are two parts called the Thermostatic Expansion Valve (TXV) and its trusty sidekick, the drier. The TXV valve is responsible for controlling the flow of refrigerant that your AC system uses to help it run at peak efficiency. The drier (also known as the refrigerant filter-drier) helps the TXV valve do its job by acting as a filter that keeps dirt and debris from entering and clogging the TXV valve. Together, they make sure your system runs smoothly.

Signs It’s Time for a TXV Valve and Drier

Why do TXV valves or driers fail? A few things can go wrong, like improper parts sizing, improper pressure levels, or cracks in the TXV valve. Dirt and debris could also clog the TXV valve if the drier-filter fails, which would put the TXV out of commission, too.

Not sure if it’s time to have your system’s TXV valve and drier replaced? Watch out for these signs:

  • Ice forming often on a refrigerant coil

  • Reduced capacity, cannot achieve thermostat set point

  • Refrigerant loss due to copper tubing fracture

  • System short cycles

How Does a TXV Valve or Drier Replacement Work?

Get an assessment of your HVAC system

An HVAC specialist will take a close look at your heating or cooling system⁠ — whether it’s your air conditioner or your heat pump⁠ — and find the source of your issue. If your TXV valve or drier are to blame, your technician will discuss a replacement.

Review the estimate with the specialist

You’ll be quoted based on the type of system (air conditioner or heat pump) you have and the type of TXV valve or drier it requires. You have options, so don’t be afraid to ask questions!

Install your HVAC TXV valve or drier

An HVAC technician will come to your house to replace your system’s old TXV or drier with a new one(s). This typically takes between three and five hours, depending on the service provider and their schedule. This can be a bit pricey, so depending on system age, you may want to consider replacing your entire system.

Looking for More Info

Check out these articles that dive deeper into the parts, processes, and preparation that go into getting a TXV and drier.

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