It is highly recommended to use a downstream gauge to verify your 50 PSI set point after the rebuild

If your system requires an insulated probe to prevent nuisance trips from scale buildup

reducing tangles and wire memory during onsite installation

ensuring a secure press-fit on the shaft to eliminate vibration and noise

Johnson Controls A421ABC-06 Temperature Control 30067439-890 It is highly recommended toThe Johnson Controls A421ABC 06 is a professional grade electronic temperature control engineered for high performance HVACR applications. As the direct replacement for A419ABC 4, this unit offers a seamless transition for technicians upgrading legacy systems. Operating on 120 240 Vac, it provides a versatile single stage control solution with an SPDT output relay, making it ideal for managing compressors, solenoid valves, or heating elements. This