The Miscellaneous Product 6UED1 M/R Rollout Switch is a safety control component designed to protect compatible gas-fired HVAC equipment from excessive heat near the burner compartment. It monitors surrounding temperatures and automatically interrupts the heating circuit when abnormal heat or flame rollout conditions occur. Commonly used in compatible gas furnaces and heating systems,... https://www.partshnc.com/6ued1-miscellaneous-product-350f-mr-rollout-switch