Carrier HT680054 Transformer this is a standard replacement

this is a standard replacement power element for both HF (fixed) and HFK (take-apart) series valves

this specific orifice is color-coded red and sized exclusively for liquid propane (LP) gas

then turn clockwise five full rotations to engage the spring

the internal diaphragm has likely lost its structural integrity or developed micro-perforations

Carrier HT680054 Transformer this is a standard replacementThe Carrier HT680054 Transformer is an essential OEM component designed for high reliability voltage step down in residential and light commercial HVAC systems. This 40VA control transformer efficiently converts a 120V primary voltage to a stable 24V secondary output, providing the necessary Class 2 power for integrated furnace control boards, 24V contactor coils, and electronic thermostats. Built to meet rigorous factory specifications, the HT680054