How do I resolve a "Snr" error code on the HydroStat display

Rated for a maximum working pressure of 600 psi and a burst pressure of 3

These parts are technically identical

Rated at F135-30F

Built with durable high-temperature insulation

Honeywell 305965 Indicating Gauge How do I resolve aThe Honeywell 305965 Indicating Gauge is a professional grade pneumatic receiver gauge engineered for high precision monitoring in commercial HVACR and industrial automation systems. Featuring a compact 1 1 2 inch diameter face, this instrument provides clear, immediate pressure readings across a 0 30 PSI range. Designed for reliability in dense control panels, it utilizes a 1 8 inch NPT center back connection (center stem back mount) for a secure,