Field testing is performed by jumping the "Test" and "Test Common" terminals

As an essential furnace safety switch

Common Questions: Is the VAL8634 compatible with R-22 systems

ensuring reliable cycling in high-temperature environments

and Luxaire fan assemblies

Carrier 334357-756 Heat Exchanger 318518-761 Field testing is performed byThe 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