Carrier 334357-756 Heat Exchanger 321042-401 The pilot-operated mechanism uses the

The pilot-operated mechanism uses the refrigerant pressure differential to assist the valve in opening

For technicians performing a 63873-SER ignitor replacement

The Sporlan 310156 MKC-1 Coil is the industry standard for reliable refrigeration solenoid valve control

5" WC (water column)

As part of the Gold Ring series

Carrier 334357-756 Heat Exchanger 321042-401 The pilot-operated mechanism uses theThe Carrier 334357 756 Secondary Heat Exchanger is a critical OEM replacement part engineered for high efficiency condensing furnaces. As a genuine RCD part, this stainless steel condensing heat exchanger is designed to capture latent heat from combustion gases, ensuring your Carrier HVAC system maintains its AFUE rating. For contractors performing a furnace heat exchanger replacement, this component provides the precise fit and thermal transfer