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Carrier 331709-789 Thermal Expansion Valve Kit

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Special Price $109.46 Regular Price $125.88
In stock
SKU
331709-789
The Carrier 331709-789 Thermal Expansion Valve (TXV) Kit is the essential component of the air conditioning and heating systems which uses R410A refrigerant and suitable for the system having the cooling capacity of 3-3.5 ton. This kit contains all the parts required for replacement or installation of thermal expansion valve for efficiency in the system. This temperature change is detected by the TXV and the flow of refrigerant is adjusted so that the evaporator is always filled with refrigerant to absorb heat but at the same time no liquid refrigerant is allowed to enter the compressor which may damage it.
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HVAC Controls & Electrical, Valves
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Specifications

  • Type: Thermal Expansion Valve Kit
  • Capacity: 3-3.5 Ton
  • Refrigerant: R410A
Manufacturer Name: Carrier
Product Number: 331709-789
OEM Part Number: 331709-789
Product Description: Kit Txv
Weight:0.86lbs/390.09g

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Product Questions (2)
Customer Questions
What maintenance is required for the Carrier 331709-789 Thermal Expansion Valve Kit?

Periodically inspect the valve for leaks, corrosion, or blockages. Ensure proper refrigerant flow and clean surrounding components to prevent clogging. Regular checks help maintain system efficiency and prevent uneven cooling. Handle carefully to avoid damaging delicate parts.

What are common issues with the Carrier 331709-789 Thermal Expansion Valve Kit?

  • Refrigerant flow restrictions.
  • Uneven cooling or temperature fluctuations.
  • Valve sticking or failing to open/close.
  • Leaks at connections or seals.

Installation Steps

Step 1: Turn off all power and refrigerant supply to the system for safety.

Step 2: Remove access panels and locate the existing TXV.

Step 3: Disconnect refrigerant lines and remove the old expansion valve carefully.

Step 4: Install the new thermal expansion valve kit, ensuring proper orientation and secure connections.

Step 5: Evacuate and recharge the system, restore power, and test for correct operation.