Description
The S1 025 35363 000 is a genuine OEM limit switch designed for gas furnaces and HVAC heating systems. This limit switch acts as an important safety control — cutting off system operation when internal temperatures exceed safe thresholds, helping prevent overheating, fire hazards, and damage to furnace components.
Key Features
- 300 °F Trip Point (Open at 300 °F) — The switch is engineered to open (cut power) when internal temperatures reach ~300 °F, protecting the furnace from overheating and excessive heat buildup.
- Manual Reset Design — After tripping, the limit switch requires manual reset — ensuring that someone inspects the system before returning to normal operation, rather than allowing automatic reset that might mask a serious fault.
- Genuine OEM / Factory Specified Part — Manufactured by York to meet original equipment specifications, ensuring proper fit and reliable safety performance when used with compatible furnace models.
- Compact & Durable Construction — Built to withstand typical furnace operating conditions and last through repeated heating cycles without premature failure.
- Critical Safety Component for Gas Furnaces — Designed to shut down furnace operation when unsafe temperature conditions occur, helping prevent fire hazards, heat damage, or unsafe operation.
- Direct Replacement for Many Furnace Models — Compatible as a replacement limit switch for furnaces originally configured to use this part number, simplifying maintenance, repair, or restoration of older units.







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