direct spark ignition (DSI)

the Fenwal 35-705902-001 is the modern microprocessor upgrade for discontinued 05-13

As a Single Pole Double Throw switch

including 0-10 VDC

Heil Quaker ICP 1187153 Limit Switch 320734-701 direct spark ignition (DSI)The Heil Quaker ICP 1187153 Limit Switch, factory designated as the L55F 22 Limit Switch, is a critical safety component engineered for precise thermal regulation within Heil Quaker and International Comfort Products (ICP) furnace assemblies. This furnace high limit switch is designed to monitor internal temperatures and interrupt the burner circuit if the heat exchanger exceeds its safe operating ceiling. This helps prevent thermal stress and