Description
The Goodman B1370253 is an OEM replacement L140-30F Stack Switch designed to provide reliable high-temperature safety protection for Goodman and compatible furnace systems. As a critical safety component, the stack switch monitors flue gas temperatures in the furnace stack and automatically interrupts burner operation when temperatures reach the upper limit setpoint, preventing dangerous overheating conditions.
How It Works
The stack switch is mounted in the flue or heat exchanger stack area of the furnace. When flue gas temperatures rise to the rated limit, the switch opens the control circuit, shutting off the burner. Once temperatures fall to within the differential range, the switch resets and allows normal operation to resume — protecting both the equipment and the occupants.
Key Specifications
- OEM Part Number: B1370253
- Switch Type: Stack Switch (Flue Temperature Limit Control)
- Limit Designation: L140-30F
- Opens (Trips) At: 140°F
- Differential: 30°F (resets at approximately 110°F)
- Brand: Goodman / Amana-Goodman OEM
Features & Benefits
- OEM replacement part engineered to Goodman factory specifications
- Provides automatic high-temperature safety shutoff to protect furnace components
- Precise trip and reset temperatures ensure reliable, repeatable performance
- Helps prevent heat exchanger damage caused by excessive flue temperatures
- Direct drop-in replacement for compatible Goodman and Amana furnace models
- Essential component for maintaining safe furnace operation and code compliance
Application
This stack switch is intended for use in Goodman and Amana residential gas furnaces as a direct OEM replacement. Always verify compatibility with your specific furnace model number before installation. Installation should be performed by a qualified HVAC technician in accordance with local codes and manufacturer guidelines.
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