Lennox 87F16 Limit Control 321894-708 this assembly utilizes a non-spring

this assembly utilizes a non-spring return actuator

the York S1-024-35706-004 utilizes its internal power module to manage motor phase and rotation

but it is standard practice to inspect and replace all mating seals to ensure airtight combustion

the 99K57 draft inducer is essential for clearing the heat exchanger of combustion gases and proving the pressure switch circuit to initiate the ignition sequence

It is specifically optimized for low-pressure steam systems where tight shut-off is critical

Lennox 87F16 Limit Control 321894-708 this assembly utilizes a non-springThe Lennox 87F16 Limit Control is a critical safety component designed for precise thermal management in residential and commercial heating systems. This 140F limit switch acts as a primary stilt mounted high limit safety, engineered to interrupt the electrical circuit if internal plenum temperatures exceed the 140 degree Fahrenheit threshold. By preventing the heat exchanger from reaching unsafe temperatures due to restricted airflow or blower