Invensys Climate Controls 41-426n Ignitor Replaces LH33ZG001

Product Description

The INVENSYS CLIMATE CONTROLS 41-426n is a 120-volt silicon nitride hot surface ignitor designed as a direct replacement for gas furnace applications. Silicon nitride ignitors are known for their durability and resistance to thermal shock compared to older silicon carbide designs, making them a reliable choice for residential and light commercial heating systems. This ignitor is installed by licensed HVAC technicians during routine maintenance or as part of a no-heat service call when the original ignitor has failed or cracked.

This ignitor is suited for use in natural gas and propane furnace systems that require a 120-volt hot surface ignition circuit. It is engineered as a direct replacement for the Carrier OEM part number LH33ZG001, allowing technicians to swap the failed component without modifying existing wiring or mounting hardware. Its silicon nitride element heats quickly and withstands repeated thermal cycling common in modern variable-capacity and single-stage furnace designs.

Key Features

• Silicon nitride element offers improved resistance to thermal shock versus silicon carbide
• Operates at 120 volts for compatibility with standard furnace ignition control circuits
• Direct replacement design minimizes installation time and hardware modifications
• Replaces Carrier OEM part LH33ZG001

Compatibility

Designed as a direct OEM-style replacement for Carrier part number LH33ZG001. Install in furnace systems specifying a 120-volt silicon nitride hot surface ignitor with this OEM cross-reference.

Installation Notes

Hot surface ignitor replacement is performed by a licensed HVAC technician. Always disconnect power to the furnace at the disconnect switch or breaker and confirm the gas supply is off before beginning work. Handle the silicon nitride element carefully to avoid cracks; avoid touching the element with bare hands, as skin oils can shorten service life. Follow the furnace manufacturer's wiring diagram and applicable local mechanical codes when reconnecting the ignitor harness.

Technical Specifications

• Voltage: 120 volts
• Element Material: Silicon Nitride
• Ignition Type: Hot Surface

Standard Information

• Brand: INVENSYS CLIMATE CONTROLS
• Manufacturer Part Number: 41-426n