making it the essential OE replacement part for Carrier

Maximum Efficiency: Rapidly eliminates mineral scale to clear plugged distribution holes and restore full water flow

The motor is built with durable internal components to withstand consistent residential use

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

York S1-3500-3121 Limit Switch 340155-7024 making it the essential OEWhen 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