Nordyne 621679R 2 Stage 4 Pole Sequencer

Nordyne / Miller / Nortek 621678 Electric Heat Sequencer | OEM

The Nordyne 621679R is a genuine factory-authorized electric heat sequencer. As an Original Equipment Manufacturer (OEM) component, it functions as a specialized timing relay that staggers the "on" and "off" cycles of heating elements and blower motors. This prevents excessive electrical loads on your home's breaker panel by ensuring multiple high-wattage components do not engage simultaneously.

This specific sequencer features a 4-pole design to manage two stages of heating. It utilizes internal thermal bimetal discs to create precise time delays, allowing the system to warm up before the blower starts and to purge remaining heat after the elements are de-energized.

Compatibility & Cross-Reference

The 621679R is the manufacturer-designated current replacement for legacy and obsolete part numbers:

• Directly Replaces Part Numbers: 6216790.
• Equipment Series: Primarily used in Nordyne, Miller, and Intertherm electric furnaces, particularly those found in manufactured and mobile homes.
• Fitment Note: Often paired with E2 and E3 series electric furnaces to control auxiliary heat strips and blower sequencing.

Technical Specifications

Why Choose a Genuine Nortek OEM Sequencer?

• Engineered Timing: Unlike universal aftermarket sequencers that may have generic delay windows, this OEM part is calibrated to the specific airflow and thermal requirements of Nordyne heat exchangers.
• Heavy-Duty Switching: The 4-pole configuration is built with robust contacts designed to switch high-amperage heating loads without "welding" or premature electrical pitting.
• Reliable 24V Activation: The internal heater coil is matched perfectly to the output of Nortek control transformers, ensuring consistent operation even in varied ambient temperatures.
• Drop-In Replacement: The mounting base and terminal spacing are identical to the factory-installed part, making for a safe and efficient installation process.

Shipping & Order Details

• Free Continental US Shipping: This part qualifies for Free Shipping within the Continental United States.
• Authenticity: This is a brand-new, genuine Nordyne-Nortek part in original factory packaging.