LH33ZS004 Furnace Igniter Hot Surface Ignitor

LH33ZS004 Furnace Igniter Hot Surface Ignitor

Key Features

• Direct replacement hot surface igniter for gas furnaces.
• Durable construction for reliable ignition performance.
• Designed as a wide-style igniter.
• Ceramic block dimensions: 2 inches wide, 7/8 inches deep.

Replaces / Cross-Reference Part Numbers

• LH33ZS004
• LH33ZS003
• LH33ZS002
• LH33ZS001

Compatibility & Fitment

• Fits various furnace models from brands including Carrier, Bryant, and Payne.
• Also compatible with select Day & Night and GE furnaces.
• Intended for systems requiring a wide-style igniter configuration.

When to Replace

• Furnace blower runs, but burners fail to ignite.
• No heat is produced during a heating cycle.
• Visible crack, burn spot, or physical damage on the existing igniter element.
• The igniter fails to glow red hot during the ignition sequence.

Installation Tips

• Always disconnect all electrical power to the furnace before servicing.
• Handle the new igniter by its ceramic base only. Oils from skin can damage the ignition element.
• Ensure the wire harness is securely connected after installation.
• Visually inspect the part for damage before installation.