Description
The Armstrong Furnace R40154B025 is an OEM replacement L130F-30 limit switch engineered to protect Armstrong furnaces from dangerous overheating conditions. This high-limit safety control monitors supply-air or heat exchanger temperatures and interrupts the burner circuit when temperatures exceed the rated set point, preventing equipment damage and ensuring safe furnace operation.
How It Works
The limit switch continuously senses furnace temperatures during operation. When temperatures rise beyond the rated threshold — indicating a blocked airflow, dirty filter, or other fault condition — the switch opens the control circuit to shut down the burner. Once the furnace cools and the fault is corrected, normal operation can resume.
Product Specifications
- Part Number: R40154B025
- Model: L130F-30
- Open Temperature: 130°F
- Differential: 30°F
- Application: Armstrong furnace high-limit protection
- Type: OEM replacement limit switch
Key Features
- Direct OEM replacement for compatible Armstrong furnace models
- Protects heat exchanger and furnace components from thermal damage
- Interrupts burner operation upon reaching the rated open temperature
- 30°F differential for reliable and stable switching performance
- Built to OEM specifications for accurate fit and dependable operation
Application
Designed specifically for Armstrong furnace systems requiring an L130F-30 limit switch replacement. Always verify compatibility with your furnace model and serial number before installation. Consult the furnace service manual and follow all applicable safety codes during replacement.
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