Flame sensor replacement cost in the US
the USModel estimateLocal wages, prices and climateUpdated each quarter
What it costs in the US
Flame sensor replacement in the US typically costs $170 for a 1,500–2,500 sq ft home. Most jobs land between $120 and $250. This is a model estimate from public wage, price and climate data; local prices sharpen it as people add theirs.
- Typical price
- $170
- Most jobs
- $120–$250
- Home size assumed
- 1,500–2,500 sq ft
- Price source
- Model estimate
What's in the price
How the typical price splits, at local wages and prices. A real quote should show the same parts.
Labor · $129
76% of the typical price. Service call and diagnosis (includes first hour on site); Clean or replace flame sensor, test. At local HVAC wages.
Materials · $41
24% of the typical price. Flame sensor (billed).
Read the quote line by line
A complete quote lists everything on the left. The right-hand column is what is often left off and billed later.
Should be on the quote
- Service call and diagnosis (includes first hour on site)
- Clean or replace flame sensor, test
- Flame sensor (billed)
Often extra
- Parts beyond the first repair
- After-hours or weekend rates
Before you sign
Six things to check before you sign
Ask for the diagnosis in writing
Which part failed and why. A written diagnosis stops a small repair from growing on the day.
Repair or replace
On systems over 12–15 years old, compare the repair against a replacement before you pay for a major part.
Permit
Most places require a mechanical permit for a replacement. Ask whether it is on the quote.
Check the license
Look the contractor up in the state registry before you sign. Our quote check does it for supported states.
Rebates
The federal 25C tax credit ended for systems installed after 2025. Utility and state programs may still apply.
Timing
Replacements are cheapest to book in spring and fall, before the first heat wave or cold snap.
Price it for your home
Typical installed price for this home in the US
$170
Labor
Local HVAC wages, BLS
$129
Materials
Disconnect and small parts. A new line set, pad or extra refrigerant is quoted separately when needed
$41
An estimate from public wage, price and climate data, not a quote. Energy figures use local rates and weather normals.
Questions
Flame sensor replacement: what people ask in the US
HVACFIND Price Index 2026Q4.2
Updated every quarter
How much does flame sensor replacement cost in the US?
Typically $170 for a 1,500–2,500 sq ft home. Most jobs fall between $120 and $250. Smaller homes start near $170; larger ones run about $170.
Is my quote fair?
Quotes between $120 and $250 are in the normal range here. Paste or upload yours into the free quote check: it compares the total, flags missing items and checks the contractor's license, all on your device.
Where do these numbers come from?
National line-item costs adjusted by local HVAC wages (BLS), regional prices (BEA), climate (NOAA) and permit fees, then corrected with real local prices as people share them. The methodology page has the details.
Second opinion
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