768A-845 Furnace Hot Surface Ignitor Replacement - Fast Reliable

In this review of the 768A-845 furnace hot surface ignitor replacement, the bottom line is simple: this is a reliable, direct-replacement ignitor for homeowners and HVAC techs who need a quick fix for ignition failures. The reviewer found the unit's silicon nitride construction and rated 80V design deliver consistent heating and faster ignition compared with worn OEM pins. It is aimed at people replacing a broken or cracked ignitor on compatible Emerson White-Rodgers and Trane systems and sells itself on durability and straightforward fit when the dimensions and 2-terminal AMP connector match the original.

Key Features

• Direct replacement: The 768A-845 is designed to match common Emerson White-Rodgers and Trane ignitors so installation is usually plug-and-play when the connector and dimensions match.
• Premium material: The silicon nitride element provides a high average ignition count and better resistance to thermal stress than cheaper ceramic alternatives.
• Compact dimensions: At roughly 3 x 1.25 x 0.35 in with a 5.25 in lead, the ignitor fits into tight furnace compartments where space is limited.
• Standard connector: The 2-terminal AMP with 0.84 in female sockets uses common wiring hardware for quicker swaps during service calls.
• Rated voltage: The 80V 50/60Hz rating matches many furnace control outputs so it behaves consistently under normal system voltages.
• Tested life: Each unit is inspected and offers an average ignition count advertised around 100,000 cycles, suggesting solid durability for regular seasonal use.

Who It's For

The 768A-845 is best for homeowners, DIYers, and HVAC technicians replacing a failed hot surface ignitor on compatible Emerson White-Rodgers or Trane furnaces who need a straightforward swap. It is particularly useful when the original part number matches or the installer can confirm the 2-terminal AMP connector and the small dimensional footprint will fit the assembly.

It is less suitable for systems that use different connector types, different pin lengths, or for users who expect a full replacement kit with brackets or mounting hardware, since this listing contains only a single ignition pin and no extra parts.

Pros & Cons

Pros

• Durable silicon nitride construction offers a long ignition life under normal use.
• Direct-replacement sizing and 2-terminal AMP connector make installation fast when compatible.
• Compact form and 5.25 in wire length fit many furnace assemblies without modification.

Cons

• The ignitor needle is extremely fragile and requires careful handling during installation to avoid breakage.
• The product ships as a single pin only, so users needing additional mounting hardware must source those separately.

Specifications

Model	768A-845
Rated voltage	80 Volt 50/60Hz
Material	Silicon nitride
Connector	2-terminal AMP, 0.84 in female sockets
Dimensions	3 x 1.25 x 0.35 in
Wire length	5.25 in
Average ignition count	About 100,000 cycles

Our Verdict

The 768A-845 furnace hot surface ignitor is a practical, value-focused replacement for compatible Emerson White-Rodgers and Trane systems. It delivers reliable ignition and long life thanks to silicon nitride construction, making it a sensible purchase for anyone who can confirm fitment and connector compatibility. Choose this if you need a durable single-pin replacement and can handle the fragile element with care.

Frequently Asked Questions

Will this ignitor fit my furnace?
Check the original ignitor dimensions, the 2-terminal AMP connector and rated voltage; if those match, it is likely a direct replacement.

Does the package include mounting hardware?
No, this product contains only the single ignition pin and no brackets or extra parts.

How fragile is the ignition needle?
The silicon nitride needle is strong in operation but extremely fragile to impact, so handle the pin carefully during installation to avoid cracking.