Description
Overview
The Armstrong Furnace R110000159 is an OEM replacement L155-40F high-limit switch engineered to protect your furnace from dangerous overheating conditions. When supply air temperatures exceed the rated set point, this limit switch interrupts the burner circuit, shutting down the heat source and preventing heat exchanger damage or fire hazard. Once temperatures return to a safe operating range, the switch resets and restores normal furnace operation.
Key Features
- OEM Armstrong Furnace replacement part — ensures proper fit and reliable performance
- L155-40F designation: opens at 155°F to protect against overheating
- 40°F differential — resets at approximately 115°F for dependable cycling
- High-limit safety function interrupts burner operation on excessive temperature rise
- Direct drop-in replacement for compatible Armstrong Furnace models
- Durable construction for long service life in residential and light commercial applications
Application
Designed as a direct OEM replacement for Armstrong Furnace systems requiring the L155-40F limit switch. Always verify compatibility with your specific furnace model number before installation.
Specifications
- SKU: R110000159
- Part Type: High-Limit Switch
- Model Designation: L155-40F
- Open (Trip) Temperature: 155°F
- Differential: 40°F
- Reset Temperature: ~115°F
- Brand: Armstrong Furnace
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