Furnace Cracked Heat Exchanger Replacement — Repair Cost in France (2026)
France national estimate: €200–€1,900 for a gas furnace — cracked heat exchanger replacement — 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: “furnace heat exchanger replacement cost”, “cracked heat exchanger repair cost”, “gas furnace heat exchanger replacement price”.
€200–€1,900 France national estimate for a gas furnace — cracked heat exchanger replacement. Localize below.
| Most common repair | Typical total (EUR) | DIY? |
|---|---|---|
| Replacing the heat exchanger body (main heat exchanger) | €600–€1,900 | Pro recommended |
| Descaling the heat exchanger body rather than replacing it | €200–€420 | 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
Gas Furnace cracked heat exchanger replacement: what usually causes it? Estimated
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Replacing the heat exchanger body (main heat exchanger)
Pro recommended€600–€1,900
In France the heat exchanger of a warm-air unit corresponds to the gas boiler's heat exchanger body, the only component actually replaced in the housing stock, and that is what is priced here. The part runs from €150 to €900 on gas and condensing models, and the fitted total can reach several thousand euros on models that are hard to get at. The heat exchanger body lasts fifteen to thirty years and stays covered for three to five years by the manufacturer's warranty, so the fault is rare but heavy. Past fifteen years, the heating engineer systematically quotes a complete replacement alongside.
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Descaling the heat exchanger body rather than replacing it
Pro recommended€200–€420
The same equivalence with the gas boiler, warm-air heating having no parts supply chain in France. When the heat exchanger body is scaled up but not holed, a chemical descale restores efficiency without committing to the price of a new part, and it is the option offered first in hard-water regions. The operation takes one to three hours depending on how fouled it is. It requires draining and partly removing the appliance, with a heating engineer's products and circulation pump.
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 gas 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 gas 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 gas 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).