Description
The Lochinvar & A.O. Smith 100208172 is a 250°F rollout switch designed to protect furnaces and boilers from the hazards of flame rollout. When abnormal combustion causes flames to escape the heat exchanger or burner compartment, this safety limit device detects the elevated temperature and interrupts the burner circuit — shutting down the system before damage or injury can occur.
Key Features
- 250°F (121°C) trip temperature for precise rollout detection
- Acts as a critical safety limit control in the burner circuit
- Designed as a direct OEM replacement for compatible Lochinvar and A.O. Smith heating equipment
- Helps prevent heat exchanger damage, carbon monoxide hazards, and fire risk caused by flame rollout
- Reliable, single-use (manual reset or auto-reset depending on unit) safety shutoff
Application
This rollout switch is engineered for use in residential and light commercial furnaces and boilers manufactured by Lochinvar and A.O. Smith. It mounts near the burner assembly and continuously monitors ambient temperatures in the burner compartment. If temperatures exceed the rated threshold — indicating a rollout condition — the switch opens the control circuit, cutting power to the gas valve and burner.
Why Rollout Switches Matter
Flame rollout is a serious combustion fault that can result from blocked heat exchangers, inadequate combustion air, or cracked heat exchanger sections. A properly functioning rollout switch is a first line of defense, protecting both the appliance and building occupants. Always replace a tripped rollout switch only after diagnosing and correcting the underlying cause.
Product Details
- Brand: Lochinvar & A.O. Smith
- SKU / Part Number: 100208172
- Trip Temperature: 250°F
- Type: Rollout Switch (Flame Rollout Limit)
- Application: Furnaces and Boilers
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