causing inefficient combustion or potential flame failure

an externally equalized valve (TES2) is recommended over this internally equalized model to ensure accurate superheat control

the fail-safe direction can be adjusted by flipping the actuator on the valve shaft or damper drive

If the solution stays purple

As a direct replacement for Johnson Controls K15DS-36 and identical to the K15DA-36H

Trane VAL8852 Gas Valve Refrigerant causing inefficient combustion or potentialThe Trane VAL8852 is a professional grade, 24 volt negative pressure gas valve designed for high efficiency heating systems. Featuring a 1 2" x 3 4" NPT connection, this direct replacement for VAL3842 is engineered for precision fuel regulation in residential and light commercial furnaces. This OEM Trane gas valve operates at a 0. 2" WC pressure setting, ensuring the highly stable vacuum referenced combustion required by modern inducer driven systems.