Heil 1056789 DPST Heat Sequencer 24V Electric Furnace Control

The Heil 1056789 is an OEM DPST (Double Pole Single Throw) heat sequencer designed for ICP (International Comfort Products), Heil Quaker, and compatible HVAC equipment. This sequencer provides precise control for electric heating elements and blower motors in Heil, Tempstar, Arcoaire, Comfortmaker, Snyder General, KeepRite, and Day & Night heating systems.

Key Specifications:

• 24 Volt operation with DPST configuration (1 timing, 2 switches)
• On timing: 1-20 seconds (time to make contacts after heater energizes)
• Off timing: 40-110 seconds (time to break contacts after heater de-energizes)
• Combined load rating: 30A @ 240 VAC total (23A non-inductive + 7 FLA/42 LRA inductive)

Function:

Heat sequencers control the staged operation of electric heating elements in forced-air furnaces and heat pumps. This component uses a time-delay mechanism to prevent all heating elements from energizing simultaneously, which reduces electrical demand spikes and extends equipment life. The DPST configuration provides two separate switch contacts controlled by a single timing circuit.

Replaces:

Compatible replacement for part numbers HN67QC005, HQ1056789, DGS103, 1256504, BT1256504, E017, 33244, 33844, NS103, Q103, 24A34-3, and TDR20.