Furnace Repair Services › Furnace Thermocouple Replacement
Furnace Thermocouple Replacement in Columbus, GA
A thermocouple is a safety device on older gas furnaces that senses whether the pilot flame is actually lit. It generates a small electrical signal that holds the gas valve open. When the thermocouple wears out or gets coated with residue, it can't generate enough signal, and the gas valve closes — killing the pilot. This is one of the most common reasons an older furnace won't stay running, and it's a repair worth doing correctly rather than just relighting the pilot again.
Columbus Furnace Repair Pros provides furnace thermocouple replacement for homeowners across Columbus, GA. Call for a free inspection and a written quote before any work begins.
When to Call
When You Need Furnace Thermocouple Replacement
- Pilot relights fine but goes out again within thirty to sixty seconds
- Older furnace in a Phenix City-area rental worked last year but won't hold a flame now
- Pilot flame looks good but the main burner still won't open
- Furnace has been relit multiple times this season and keeps shutting off
How It Works
Our Process for Furnace Thermocouple Replacement
- 1
Thermocouple Output Test
We measure the millivolt output of the existing thermocouple to confirm it's below the threshold needed to hold the gas valve.
- 2
Visual Inspection
We check for corrosion, tip damage, and whether the thermocouple is positioned correctly in the pilot flame.
- 3
Replacement and Positioning
We install the correct replacement and set the tip precisely in the hottest part of the pilot flame for reliable signal.
- 4
Hold Test
We relight the pilot and wait to confirm the flame holds, then fire the main burner and verify normal operation.
Columbus Context
Why this matters in Columbus
Columbus has a large stock of older homes with furnaces that were installed in the 1980s and early 1990s. These units still run fine overall, but their thermocouples are well past typical service life and fail quietly every season.
Straight Talk
About pricing & scope
Thermocouple replacement is usually a contained repair. If the gas valve itself has a weak magnet or internal problem, it may not hold even with a good thermocouple — we'll tell you that before you spend more money.
What This Fixes
Problems We See in Columbus
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