White-rodgers 24A34-4 Electric Heat Sequencer

Product Description

The WHITE-RODGERS 24A34-4 is an electric heat sequencer designed to stage the activation of electric resistance heating elements in forced-air electric furnaces and air handlers. Sequencers prevent all heating elements from energizing simultaneously, which would cause excessive inrush current and potential tripping of overcurrent protection. This unit features 1 timing circuit and 2 switches, allowing it to control the staged startup sequence of two separate heating element circuits. It is installed by licensed HVAC technicians during new equipment setup or as a replacement part during service calls.

This sequencer is suited for residential electric forced-air heating systems where multiple heating elements must be staged to reduce peak current draw at startup. It mounts inside the electric furnace or air handler cabinet and wires into the low-voltage control circuit and the line-voltage element circuits. Applications include replacement of failed or degraded sequencers causing slow heat response, nuisance tripping, or elements that fail to energize in proper sequence.

Key Features

• 1 timing circuit controls the delay interval between switch actuations
• 2 switches allow staged control of two separate heating element circuits
• Prevents simultaneous inrush current from multiple heating elements
• Direct replacement format for standard electric furnace sequencer applications
• Designed for integration into low-voltage control and line-voltage element wiring

Compatibility

Designed as an OEM-style replacement sequencer for residential electric forced-air furnaces and air handlers that require staged heating element control with a 1-timing, 2-switch configuration.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all power to the unit before removing the existing sequencer or handling any wiring. Sequencers are wired into both the low-voltage control circuit and the line-voltage element circuits, so confirm both are de-energized before proceeding. Follow the equipment manufacturer wiring diagram when connecting the replacement sequencer to ensure correct switch-to-element assignments.