What is Thermocouple?
A single-junction temperature sensor that generates ~25 mV when heated. Holds the pilot's safety valve open. The most common gas-fireplace failure point — replace as a $30 maintenance item.
Related terms:ThermopilePilot Light
All glossary terms
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Other terms in the glossary
Creosote
Tar-like residue from incomplete wood combustion. Highly flammable.
NFPA 211
The US standard for chimney, fireplace, and vent system installation.
Inspection Levels
Level 1 (annual), Level 2 (sale/event), Level 3 (concealed damage).
Flue
The internal passage that carries combustion gases up and out.
Liner
Inner channel of the flue — clay tile, stainless steel, or cast-in-place.
Crown
The concrete cap at the very top of a masonry chimney.
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Years
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Emergency
24/7 Response
Active leak, animal in flue, post-fire damage, or smoke event? Real humans on the line 7 AM to 12 AM every day — replies in under 2 minutes. Tech dispatch within 2 hours during business hours, subject to crew availability after-hours.
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