Trane IG403K Hot Surface Igniter 120V Silicon Carbide

Product Description

The TRANE IG403K is a universal 120-volt silicon carbide hot surface igniter designed for residential and light commercial gas furnace applications. The igniter replaces failed or worn ignition elements and restores proper furnace startup sequence. Silicon carbide construction delivers rapid heat-up and reliable ignition performance across repeated cycles. The 2-inch ceramic base provides electrical isolation and mechanical support during installation. This part is installed by licensed HVAC technicians as part of routine furnace ignition system service.

The IG403K is suited for use in forced-air gas furnace systems requiring a universal 120-volt hot surface igniter with a ceramic base mount. Its universal design makes it a practical replacement option across a broad range of gas furnace configurations. The 2-inch ceramic base accommodates standard igniter mounting positions found in many residential furnace cabinets. Installers should verify voltage requirements and mounting dimensions prior to installation.

Key Features

• Silicon carbide element for fast heat-up and durable ignition performance
• 120-volt operating voltage compatible with standard residential furnace control boards
• 2-inch ceramic base provides electrical isolation and stable mounting
• Universal replacement design broadens fitment across multiple furnace platforms
• Hardware included for straightforward field installation

Compatibility

Designed as a universal OEM-style replacement hot surface igniter for 120-volt residential and light commercial gas furnace systems requiring a silicon carbide igniter with a 2-inch ceramic base.

Installation Notes

Installation should be performed by a licensed HVAC technician. Shut off all electrical power to the furnace at the disconnect or breaker before removing the existing igniter. Silicon carbide igniters are fragile — avoid direct contact with the element during handling, as skin oils can cause premature failure. Verify the replacement igniter voltage and mounting configuration match the existing unit before energizing the system.

Technical Specifications

• Voltage: 120 volts
• Igniter Material: Silicon Carbide
• Base Type: Ceramic
• Base Size: 2 inches

Standard Information

• Brand: TRANE
• Manufacturer Part Number: IG403K