Oil Furnace Cracked Heat Exchanger / Combustion Chamber — Repair Cost in France (2026)
France national estimate: €120–€3,500 for a oil furnace — cracked heat exchanger / combustion chamber — built from French sources, never converted from another country's prices. Pick your quality tier and enter a postal code to localize. Reviewed July 2026.
Also searched as: “oil furnace heat exchanger replacement cost”, “cracked heat exchanger oil furnace cost”, “oil furnace combustion chamber replacement cost”.
€120–€3,500 France national estimate for a oil furnace — cracked heat exchanger / combustion chamber. Localize below.
| Most common repair | Typical total (EUR) | DIY? |
|---|---|---|
| Replacing the oil boiler's heat exchanger body | €300–€3,500 | Pro recommended |
| Replacing the turbulators and the combustion chamber door seals when the heat exchanger body is still sound | €120–€480 | Pro recommended |
Plus a typical service-call / diagnostic fee of €80–€170, often credited toward the repair.
Pick a quality tier for a class-typical estimate, or a specific French brand to override it (both adjust the parts portion only, never labour). Enter a French postal code to localize to your region's labour costs. All figures stay in euros, never converted from another country's prices. Everything updates without a page reload.
Base: published rates from 3 French heating & cooling companies (2026-07) · France national base range (Insee Tous salariés 2023) · Reviewed July 2026 · Estimated
How do brand and quality tier change the repair cost?
Brand and tier adjust the parts portion only — never labour. Value-tier brands — Ariston, Chaffoteaux and Auer — carry some of the lowest parts factors; Saunier Duval, ELM Leblanc, De Dietrich, Chappée, Atlantic, Thermor and Riello form the mainstream core of the French heating market, with Saunier Duval as the price anchor for this list; premium makers — Vaillant, Frisquet and Viessmann — source mainly through the manufacturer's own network (pièces d'origine). On the heat-pump and split-system side, Daikin, Mitsubishi Electric and Toshiba sit in the premium tier, Panasonic, LG and Atlantic in the mainstream core, and Airwell at the value end. Pick a tier for a class-typical estimate, or a specific French brand to override it.
| Brand | Parts factor | Basis |
|---|---|---|
| Basic tier parts ×0.925 | ||
| Chaffoteaux | ×1 | Baseline — no parts adjustment |
| Ariston | ×1 | Baseline — no parts adjustment |
| Auer | ×0.85 | Parts ×0.85 (published rates from 2 local repair companies) |
| Airwell | ×0.85 | Parts ×0.85 (published rates from 3 local repair companies) |
| Mid-range tier parts ×1.1 | ||
| Saunier Duval | ×1 | Baseline — no parts adjustment |
| ELM Leblanc (Bosch) | ×1.5 | Parts ×1.5 (published rates from 2 local repair companies) |
| De Dietrich | ×1.3 | Parts ×1.3 (published rates from 5 local repair companies) |
| Chappée | ×1.5 | Parts ×1.5 (published rates from 3 local repair companies) |
| Atlantic | ×0.9 | Parts ×0.9 (published rates from 3 local repair companies) |
| Thermor | ×1.15 | Parts ×1.15 (published rates from 2 local repair companies) |
| Riello | ×0.9 | Parts ×0.9 (published rates from 2 local repair companies) |
| Cuenod | ×1.1 | Parts ×1.1 (published rates from 2 local repair companies) |
| Panasonic | ×0.85 | Parts ×0.85 (published rates from 3 local repair companies) |
| Premium tier parts ×1.15 | ||
| Frisquet | ×1.05 | Parts ×1.05 (published rates from 2 local repair companies) |
| Vaillant | ×1.15 | Parts ×1.15 (published rates from 3 local repair companies) |
| Viessmann | ×1.1 | Parts ×1.1 (published rates from 2 local repair companies) |
| Daikin | ×1.35 | Parts ×1.35 (published rates from 2 local repair companies) |
| Mitsubishi Electric | ×1.6 | Parts ×1.6 (published rates from 2 local repair companies) |
Base: French brand parts factors from French parts retailers and repair guides; tier factor = median of the tier's French brands · Applied to the parts portion only · Reviewed July 2026 · Estimated
Oil Furnace cracked heat exchanger / combustion chamber: what usually causes it? Estimated
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Replacing the oil boiler's heat exchanger body
Pro recommended€300–€3,500
In the French housing stock the oil appliance is a wet boiler: the heat exchanger that holes is the water-side heat exchanger body, and not the heat exchanger of a warm-air unit as on North-American installations, and it is that part which is priced here. This is the repair that decides the boiler's fate: a holed heat exchanger body causes a permanent water leak and the professional almost always quotes a complete replacement of the appliance alongside. The French prices recorded run from €300 to €3,500 with parts and labour included, the part alone from €150 to €2,500, with a price guide updated in August 2024 citing the heat exchanger at €1,000 depending on the model; the spread comes from the output, the brand and the availability of the part. The part is covered for 3 to 5 years by the manufacturer's warranty, and completely removing an oil boiler and then recommissioning it is not done without a heating engineer.
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Replacing the turbulators and the combustion chamber door seals when the heat exchanger body is still sound
Pro recommended€120–€480
Here again the part concerned is that of a wet boiler, on the combustion chamber side and the water side, and not the heat exchanger of a warm-air unit. Before committing to a complete heat exchanger body, the heating engineer often checks that the loss of efficiency comes only from distorted turbulators and burnt combustion chamber door seals, very common on oil boilers of fifteen to twenty-five years. It is the economical option, built on the heating engineer's hourly rate recorded at €40 to €80 an hour, up to €150 an hour on oil, plus replacement parts of the order of a few tens of euros up to two hundred euros. Opening the combustion chamber and the flue gas leak-tightness check make a professional essential, and the job concludes with a combustion analysis.
Base: published rates from 3 French heating & cooling companies (2026-07) · France national base range (Insee Tous salariés 2023) · Reviewed July 2026 · Estimated
How much is a service-call fee for oil furnace repair?
Most French companies charge a call-out / diagnostic fee of €80–€170, often credited toward the repair if you go ahead. It is separate from the repair totals above. VAT on French home heating and cooling work is usually the 10% reduced rate for repair and maintenance in a dwelling completed more than two years ago, not the 20% standard rate; some energy-performance improvement work can fall to 5.5%, depending on the equipment fitted and the rules in force. Many independent installers and micro-entrepreneurs also fall under France's small-business VAT exemption (franchise en base de TVA, €37,500 threshold for services) and charge no VAT at all — their invoices carry the note "TVA non applicable, art. 293 B du CGI". Prices displayed to consumers in France are quoted TTC (toutes taxes comprises — all taxes included).
Is it worth repairing a oil furnace, or should you replace it?
A common rule of thumb: if the repair cost exceeds roughly half the price of a comparable new unit — or the appliance is past ~8 years for a oil furnace — replacement is often the better value. The calculator's localized totals give you the number to weigh against a new-unit quote.
Prices are region-level estimates based on regional wage data (Insee, Tous salariés 2023 all-employees base), not fake city precision. Shopping in the U.S.? See the U.S. version (USD). In Canada? See the Canadian version (CAD). See the methodology for the localization method and named sources, or return to the France HVAC repair guide.
Reviewed by a Red Seal–certified appliance technician who also holds a Technical Safety BC gas ticket (Gas-C) and an ODS/halocarbon refrigerant ticket (CFC/HCFC/HFC).