this furnace limit switch monitors internal plenum temperatures to prevent heat exchanger damage

this unit converts dissolved calcium and magnesium minerals into inactive microscopic crystals

it ensures proper subcooling maintenance and provides necessary storage during pump-down cycles

we recommend retaining your original screws or purchasing matching rust-resistant screws for installation

Using an NG pilot assembly on an LP system can cause dangerous combustion issues due to the different orifice size requirements

Siemens Combustion SQN70.603R10 Control 322838-752 this furnace limit switch monitorsThe Siemens SQN70. 603R10 is a high performance 120V gas burner control actuator engineered for precise load dependent regulation of fuel and combustion air. This counter clockwise (CCW) rotation motor is designed to drive air or gas dampers on small to medium capacity oil and gas burners. Featuring a 90 degree angular rotation with a 25 second running time at 60Hz and 30 seconds at 50Hz, it provides stable modulation for advanced burner systems. The