Trane SWT1936 Limit Switch Overview
The Trane SWT1936 is a precision-engineered limit switch designed to protect HVAC heating systems from overheating conditions. With an open setpoint of 120°F and a close (reset) setpoint of 90°F, this limit switch automatically interrupts the heating circuit when temperatures exceed safe operating thresholds, then resets once the system cools to the specified close temperature. It is a direct OEM replacement part, ensuring a reliable fit and dependable performance in Trane heating equipment.
Key Features
- Open setpoint: 120°F — interrupts circuit to prevent overheating
- Close (reset) setpoint: 90°F — restores circuit once system cools
- OEM Trane replacement part for precise fit and compatibility
- Automatic reset operation for convenient, hands-free recovery
- Provides critical overheat protection for furnace and air handler applications
- Durable construction for long-lasting, dependable service life
Application
The SWT1936 limit switch is used in Trane furnaces and heating systems to monitor supply air or heat exchanger temperatures. When temperatures rise beyond the 120°F open setpoint — due to restricted airflow, a dirty filter, or other fault conditions — the switch opens to cut power to the burner or heating element, preventing equipment damage and potential safety hazards. The switch automatically resets at 90°F, returning the system to normal operation once the root cause has been resolved.
Why Choose an OEM Trane Limit Switch?
Using a genuine Trane OEM limit switch ensures accurate setpoints, proper electrical ratings, and a direct drop-in replacement with no modifications required. This helps maintain system efficiency, equipment warranty compliance, and the highest level of safety for building occupants.
Product Specifications
- Brand: Trane
- Part Number: SWT1936
- Type: Limit Switch
- Open Temperature: 120°F
- Close Temperature: 90°F
