Its balanced valve design utilizes a roll-type diaphragm to maintain stable outlet pressure even as inlet pressures fluctuate up to a 60 PSIG maximum

You can always use a higher voltage rating than the original (e

What does the 'SF' fault code mean

The integrated NEMA 4X enclosure offers superior protection against corrosion and water ingress

Operating on a 24Vac circuit

York S1-3500-3121 Limit Switch 340155-7024 Its balanced valve design utilizesWhen you are troubleshooting a mid efficiency or high efficiency furnace that is short cycling or displaying a four flash diagnostic code, the York S1 3500 3121 Limit Switch is the OEM replacement part required to restore safe operation. This is a normally closed (NC) safety device calibrated for an opening temperature of 165F and a closing temperature of 105F. As a genuine Johnson Controls component, it is designed for drop in compatibility with