Description
The Supco SRL135 is a 1/2″ bimetal rollout limit switch engineered to protect furnaces and heating systems from dangerous flame rollout conditions. With a fixed cut-out temperature of 135°F and an open-on-rise switch action, this control interrupts the circuit the moment temperatures exceed the safe threshold — shutting down the burner before heat damage or fire hazards can occur. The manual reset design ensures a technician must physically inspect and clear the fault before the system is returned to service, adding an important layer of safety accountability.
Built for reliable, long-term performance in residential and light commercial HVAC applications, the SRL135 is a direct replacement solution for a wide range of gas furnaces and heating appliances.
Key Features
- 135°F fixed cut-out temperature for precise, consistent protection
- Open on rise switch action — circuit opens when temperature exceeds set point
- Manual reset required after trip — ensures technician inspection before restart
- 1/2″ bimetal rollout limit switch construction
- Designed for furnace rollout protection in residential and light commercial systems
- Direct replacement for compatible OEM rollout limit switches
Specifications
- Brand: Supco
- SKU: SRL135
- Cut-Out Temperature: 135°F (Fixed)
- Switch Action: Open on Rise
- Reset Type: Manual Reset
- Sensor Type: 1/2″ Bimetal
- Application: Rollout Limit Switch
Application
The SRL135 is ideal for use in gas furnaces where rollout limit protection is required. When installed correctly, it monitors the temperature in the burner area and trips if abnormal heat levels are detected — a common symptom of a cracked heat exchanger, blocked flue, or improper combustion. Always verify compatibility with the OEM specifications of the equipment being serviced.
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