[Lifetime Warranty] LH33ZS004 Furnace Igniter Hot Surface Ignitor

LH33ZS004 Furnace Igniter Hot Surface Ignitor

Key Features

• Updated design for reliability and extended service life.
• Constructed from high-resistance silicon nitride for consistent performance.
• Direct-fit replacement for specified OEM parts.
• Operating Current: 2.7 - 3.9 Amps.
• Features a 2-inch wide ceramic mounting base.

Replaces / Cross-Reference Part Numbers

• LH33ZS004
• LH33ZS003
• LH33ZS002
• LH33ZS001

Compatibility & Fitment

• Designed for use in various furnace models from the following brands:
• Carrier
• Bryant
• Payne
• Day&Night
• GE

When to Replace

• Furnace attempts to start but the main burner does not light.
• The ignitor element does not glow orange/red during the ignition sequence.
• Visible cracks, breaks, or burn marks on the ignitor element.
• The furnace cycles on and off without producing consistent heat.

Installation Tips

• Disconnect all electrical power and shut off the gas supply to the furnace before service.
• Handle the new ignitor by its ceramic base only. Avoid touching the element, as skin oils can cause premature failure.
• Verify the new part matches the old one in size, shape, and electrical connection before installing.
• Ensure wire connections are secure and clear of any moving parts or high-heat areas.