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Carrier 331709-799 Thermostatic Expansion Valve (TXV)

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Special Price $254.89 Regular Price $282.92
In stock
SKU
331709-799
The Carrier 331709-799 functions as a Thermostatic Expansion Valve (TXV) which operates within different Carrier HVAC systems particularly in air conditioners and heat pumps. The valve controls evaporator coil refrigerant intake through a mechanism that depends on the superheat of exiting refrigerant. The TXV maintains perfect evaporator performance by managing refrigerant flow that results in maximum cooling efficiency. Precise temperature control combined with improved energy efficiency as well as enhanced system performance becomes possible through this device. The valve provides steady cooling performance while decreasing energy usage and preventing compressor flooding. An HVAC system depends on the TXV to function efficiently and reliably.
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HVAC Controls & Electrical, Valves
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Product Questions (2)
Customer Questions
What maintenance is required for the Carrier 331709-799 Thermostatic Expansion Valve?

Regularly inspect the valve for leaks, corrosion, and proper operation. Ensure connections are tight and refrigerant lines are clean. Proper maintenance prevents system inefficiency and ensures accurate temperature control. Always follow safety precautions when handling refrigerants.

What are common issues with the Carrier 331709-799 Thermostatic Expansion Valve?

  • Inconsistent refrigerant flow.
  • Frost buildup on evaporator.
  • Valve sticking or sluggish response.
  • Pressure fluctuations.

Installation Steps

Step 1: Turn off the HVAC system and disconnect power to ensure safety.

Step 2: Locate the existing TXV in the refrigerant line and carefully remove it.

Step 3: Clean the connection points to remove debris and ensure a tight seal.

Step 4: Install the new TXV, matching the inlet/outlet orientation correctly.

Step 5: Reconnect refrigerant lines, check for leaks, and tighten fittings.

Step 6: Restore power, run the system, and verify proper cooling performance.