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

What does the 'SF' fault code mean

Can I use a 1" insert if this is 3"

Does this include mounting hardware or gaskets

York S1-3500-3121 Limit Switch 340155-7024 The integrated NEMA 4X enclosureWhen 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