House Parts [Lifetime Warranty] LH33ZS004 Furnace Igniter Hot Surface Ignitor
LH33ZS004 furnace hot surface igniter with white ceramic base, wire leads, connector, and two wire nuts.
LH33ZS004 furnace hot surface igniter showing detailed dimensions and lead length measurements.
LH33ZS004 furnace hot surface igniter with wire harness and wire nuts for reliable gas burner ignition.
Infographic showing superior materials for LH33ZS004 furnace igniter including carbide element, connector, and ceramic nuts.
Protective sponge packaging for LH33ZS004 furnace igniter showing proper handling instructions.
LH33ZS004 furnace hot surface igniter with wire harness and wire nuts shown next to a furnace unit.
LH33ZS004 furnace igniter showing technical specifications and heating performance.
LH33ZS004 furnace hot surface igniter with wire harness and wire nuts against a compatibility information background.
LH33ZS004 furnace hot surface igniter with white ceramic base and quality inspection text overlay.
LH33ZS004 furnace hot surface igniter with white ceramic base, wire leads, connector, and two wire nuts.
LH33ZS004 furnace hot surface igniter showing detailed dimensions and lead length measurements.
LH33ZS004 furnace hot surface igniter with wire harness and wire nuts for reliable gas burner ignition.
Infographic showing superior materials for LH33ZS004 furnace igniter including carbide element, connector, and ceramic nuts.
Protective sponge packaging for LH33ZS004 furnace igniter showing proper handling instructions.
LH33ZS004 furnace hot surface igniter with wire harness and wire nuts shown next to a furnace unit.
LH33ZS004 furnace igniter showing technical specifications and heating performance.
LH33ZS004 furnace hot surface igniter with wire harness and wire nuts against a compatibility information background.
LH33ZS004 furnace hot surface igniter with white ceramic base and quality inspection text overlay.
Lifetime Warranty

[Lifetime Warranty] LH33ZS004 Furnace Igniter Hot Surface Ignitor

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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.
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  • REPLACES PART NUMBERS

    REPLACES PART NUMBERS

    LH33ZS004, LH33ZS001, LH33ZS002, LH33ZS003
  • COMPATIBLE BRANDS

    COMPATIBLE BRANDS

    Carrier, Bryant, Payne, Day&Night, GE, Hotpoint, etc.
  • FIX FURNACE'S SYMPTOMS

    FIX FURNACE'S SYMPTOMS

    Furnace not heating | Requires burner to light | Gas won’t flow without burner on | Prolongs furnace lifespan
  • IMPORTANT NOTE

    IMPORTANT NOTE

    This is a replacement part designed to be compatible with certain appliances. Any brand names mentioned are used solely to indicate compatibility.
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Enjoy the comfort that our small yet mighty parts bring to your home
Manufacturer
‎BlueStars
Part Number
‎LH33ZS004
Item Weight
‎1 pounds
Included Components
‎1 x LH33ZS004
Batteries Required?
‎No
Warranty Description
‎lifetime

FAQ

LH33ZS004 is commonly used on select Carrier, Bryant, and Payne gas furnaces. Compatibility depends on the exact furnace model, so the safest match is to verify that your existing igniter or your furnace parts list calls for part number LH33ZS004.
This is a hot surface igniter. During a heat call, it heats up and glows bright orange to ignite the gas burner. If it does not heat properly, the burners may fail to light and the furnace may shut down after an ignition attempt.
Typical symptoms include the furnace inducer starting but the burners never lighting, no orange glow from the igniter, repeated ignition attempts, or the furnace going into safety lockout. A cracked igniter element is also a common visible sign of failure.
Match the number LH33ZS004 to the number printed on the original igniter, shown on the furnace parts diagram, or listed on the unit's service information. Because hot surface igniters are not universally interchangeable, matching the exact part number is more reliable than comparing appearance alone.
For many furnaces, replacement is a moderate repair that usually takes about 15 to 30 minutes. Typical tools are a screwdriver or nut driver to remove the burner compartment panel and the igniter mounting screw. Always shut off electrical power to the furnace before starting.
Yes. Handle the igniter carefully because the element is brittle and can crack easily if bumped or overtightened. Avoid touching the heating surface more than necessary, keep the mounting position the same as the original, and make sure the wire connector is fully seated before restoring power.
If LH33ZS004 is installed correctly and the furnace still will not ignite, check for proper power to the furnace, a tripped rollout or limit switch, a dirty flame sensor, gas supply issues, a faulty control board, or a pressure switch/venting problem. The igniter is a common failure point, but it is not the only cause of ignition failure.