Field Versatility: Features a selectable rotation switch and manual override button for simplified commissioning and troubleshooting

The Lennox Y8852 is a 7-inch limit control switch designed for reliable temperature regulation and safety shutdown in HVAC heating systems

Enhanced System Safety: Monitors flame sensing and blower timing to maintain rigorous safety standards

the 540-104-R ensures stable room pressure and temperature regulation using an advanced PID loop that minimizes unnecessary airflow setpoint hunting

Precise Ignition Timing: Integrated microprocessor control ensures repeatable 7-second TFI and 24VAC sequencing

Resideo S8701A1106 Ignition Module 320788-703 Field Versatility: Features a selectableResideo S8701A1106 is an 11 second lockout direct spark ignition (DSI) module designed for gas fired HVAC equipment such as furnaces, boilers, and rooftop units. It controls the burner ignition process by providing timed spark ignition and monitoring flame presence to ensure proper combustion and safe operation. This module is commonly used as a replacement ignition control when the original board has failed or is no longer reliable. The 11 second