Description
The York S1-024-35888-000 is an OEM replacement limit switch engineered to protect York furnaces and heating systems from dangerous overheating conditions. With a precisely calibrated open temperature of 235°F and an automatic reset point of 205°F, this limit switch reliably interrupts the burner circuit when supply air temperatures exceed safe operating thresholds — then automatically restores normal operation once temperatures return to the safe range.
How It Works
The limit switch continuously monitors heat exchanger or supply air temperatures. If the monitored temperature climbs to 235°F, the switch opens and shuts down the burner to prevent equipment damage and potential fire hazards. Once the temperature drops back to 205°F, the switch automatically resets, allowing the system to resume normal heating operation without manual intervention.
Key Features
- Open (trip) temperature: 235°F
- Automatic reset temperature: 205°F
- Auto-reset (A/R) operation — no manual reset required
- OEM York replacement part — direct-fit for compatible York furnace models
- Provides critical overheat protection for heat exchanger and blower system
- Helps prevent nuisance shutdowns while ensuring reliable safety performance
Application
- Designed as a direct OEM replacement for York residential and light commercial furnaces
- Installs in the limit switch mounting location on the furnace heat exchanger or plenum
- Consult your York equipment service manual to confirm compatibility with your specific model
Why Choose OEM York Parts?
Using genuine York replacement components ensures proper fit, calibrated performance, and maintained equipment warranty compliance. The S1-024-35888-000 is built to York’s exacting standards, giving HVAC technicians confidence in every installation.







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