TL;DR
A hot surface igniter is the silicon carbide or silicon nitride element in a gas furnace or water heater that glows white-hot on command to light the burners, replacing standing pilots and spark systems in most modern equipment. The brittle carbide style cracks from handling, power surges, and age, making it one of the most common no-heat repair parts; nitride versions last longer and run at lower temperatures.
What it means
A hot surface igniter is the silicon carbide or silicon nitride element in a gas furnace or water heater that glows white-hot on command to light the burners, replacing standing pilots and spark systems in most modern equipment. The brittle carbide style cracks from handling, power surges, and age, making it one of the most common no-heat repair parts; nitride versions last longer and run at lower temperatures. A furnace that clicks through its sequence but never lights, with no orange glow visible at the burner, points here first.
Where it sits in the glossary
Hot surface igniter is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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