Westinghouse 669684R Txv Assembly R-410A 3.5 Ton Ac Coil

Product Description

The WESTINGHOUSE 669684R is a thermostatic expansion valve (TXV) assembly designed for use in residential air conditioner indoor coil applications. The TXV meters refrigerant flow into the evaporator coil, maintaining optimal superheat across the coil face to protect the compressor and sustain system efficiency. This assembly is rated for R-410A refrigerant and sized for 3.5-ton systems. It is a direct OEM-style replacement component installed by licensed HVAC technicians during coil service, refrigerant circuit repairs, or system retrofits where the original valve has failed or lost calibration.

This TXV assembly is used on residential air conditioner indoor coil units. Compatible model numbers include C6BA-X42C-B, C6BA-X42C-C, C6BH-X42C-B, C7BH-X42C-C, and C7BH-X42C-D, spanning the C6BA-X and C7BH model families. It is intended for split-system cooling installations where the indoor coil is paired with a matched outdoor condensing unit. Confirm the model number on the coil cabinet nameplate before ordering.

Key Features

• Rated for R-410A refrigerant — no refrigerant-type conversion required on compatible systems
• Sized for 3.5-ton cooling capacity
• OEM-style replacement assembly for direct swap on listed coil model numbers
• Maintains proper superheat control to protect compressor from liquid slugging
• Covers multiple coil variants across C6BA-X and C7BH model families

Compatibility

Confirmed compatible with air conditioner indoor coil units C6BA-X42C-B, C6BA-X42C-C, C6BH-X42C-B, C7BH-X42C-C, and C7BH-X42C-D in the C6BA-X and C7BH model families.

Installation Notes

Installation must be performed by an EPA Section 608 certified HVAC technician, as this repair involves a sealed refrigerant circuit. Recover all refrigerant from the system before opening the refrigerant lines — never vent R-410A to atmosphere. After replacing the TXV assembly, the system must be evacuated to the appropriate micron level before recharging with R-410A. Verify superheat readings at the suction line after startup to confirm proper valve operation.

Technical Specifications

• Refrigerant Type: R-410A
• Cooling Capacity: 3.5 Ton
• Component Type: Thermostatic Expansion Valve Assembly
• Application: Air Conditioner Indoor Coil

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 669684R