Lennox 12J16 Sequencer

Sequencer

12J16 is the cross of 104284-01

Lennox 12J16 Heat Sequencer Relay – 24V Thermal Sequencer (104284-01)

The Lennox 12J16 Heat Sequencer is an OEM thermal sequencer relay designed to control staged electric heat in HVAC air handler and furnace systems. Also referenced as part number 104284-01, this component ensures safe and efficient operation of electric heating elements by sequencing blower and heater operation with precise timing delays.

This DPDT normally open (N.O.) sequencer operates on 24 volts and features an ON delay of 30–90 seconds and an OFF delay of 1–30 seconds, helping prevent electrical overload and extending the life of your heating system components. It is commonly used in Lennox electric furnaces and air handlers requiring controlled heat strip activation.

Built to Lennox OEM specifications, the 12J16 sequencer is ideal for HVAC service professionals and maintenance technicians seeking a reliable replacement part that ensures proper heat staging and system safety.

Key Features

• OEM Lennox Part – Direct replacement for original component

• Part Numbers: 12J16, 104284-01

• Type: Thermal Heat Sequencer Relay

• Contact Configuration: DPDT, Normally Open (N.O.)

• Voltage: 24V

• ON Delay: 30–90 seconds

• OFF Delay: 1–30 seconds

• Designed for electric furnace and air handler heat strip control

Applications

• Lennox electric furnaces

• Lennox air handlers with electric heat kits

• HVAC systems requiring timed heat sequencing

Replacing a faulty sequencer helps restore proper heater staging, prevents short cycling, and protects system components from excessive current draw.

Note: Always verify part numbers and system compatibility before ordering.