Is this a direct fit for older Heil Quaker models

s configuration

making it suitable for demanding commercial and residential environments

fitting Ovenpak 400/500 series with 1/2" NPT threads

Johnson Controls A25AN-1 Temperature Control 30067439-890 Is this a direct fitThe Johnson Controls A25AN 1 is a heavy duty warm air limit control designed for high limit protection in forced air heating systems. This mechanical temperature control features a single pole single throw (SPST) switch configuration that opens on temperature rise, providing a critical safety cutoff to prevent furnace overheating. With a setpoint range of 25 to 215F and a manual reset mechanism, the A25AN 1 ensures that equipment remains offline until