What Makes a Sauna Fault a Product Issue?
Key Takeaways
A sauna fault is a product issue when evidence places its cause in the material, manufacture or design.
The other origins are installation and connection, use, and maintenance. “Not yet determined” is a legitimate fifth status.
Four comparisons sort a case: first appearance, repetition, the factory record and the instructions.
For consumer sales, Directive (EU) 2019/771 presumes a fault appearing within one year of delivery existed at delivery.
That directive covers consumer sales only. Between dealer and manufacturer, the supply contract and national law decide.
Directive (EU) 2024/2853 defines a defect by safety and applies to products placed on the market after 8 December 2026.
An accident, or reason to believe the sauna is dangerous, moves the case to the safety route.
A fault report can reach the factory as one photograph and the word defect. We assemble and check every sauna in Klaipėda before it ships, so each unit has a known state at our door. What happened after that door is the part only you can show.
What Makes a Sauna Fault a Product Issue?
A sauna fault is a product issue when the evidence places its cause in the material, the manufacture or the design before the unit left the manufacturer. A symptom alone doesn't establish that. The same symptom can come from installation and connection, from use or from maintenance. Until the evidence separates them, the accurate label is “not yet determined”. Four comparisons do the separating: first appearance, repetition, the factory record and the instructions.
Why doesn't the word “defect” settle a claim?
Because the word carries more than one legal test. We checked the legal texts on EUR-Lex on 7 October 2026.
In consumer law the term is lack of conformity. Directive (EU) 2019/771 tests it in Articles 6 to 8: the contract's description and quality, fitness for normal use and reasonably expected durability. Under Article 8, incorrect installation counts too when the seller, or someone under its responsibility, installed the goods as part of the sale.
So if you sold and installed the sauna for a consumer, they don't have to sort factory from crew. Towards them, both land on the seller.
In product liability law the test is safety. Directive (EU) 2024/2853 calls a product defective when it lacks the safety a person is entitled to expect, or that the law requires (Article 7). Fitness for use isn't the test there.
That directive applies to products placed on the market or put into service after 8 December 2026, a date fixed by a corrigendum of 7 May 2026.
Directive (EU) 2019/771 applies to sales between a consumer and a seller (Article 3). It doesn't govern your purchase from the manufacturer.
Article 18 gives the seller a right of redress and leaves the conditions to national law. Between you and the factory, that law and the supply contract decide.
Which origins can a sauna fault have?
Once a sauna is delivered and standing, a fault has four possible origins. A fifth label holds the case while evidence is missing. Transit damage is a separate delivery question.
Origin | Typical signs | Evidence needed | Who confirms |
|---|---|---|---|
Product: material, manufacture or design | Present at unpacking or first heat-up. The same symptom on other units of that configuration. A part that differs from the order drawing. | Factory record beside arrival photographs. The part itself, if returnable. | Manufacturer's technical review. For a bought-in component, its maker. |
Installation and connection | The symptom sits where site work met the product: base, lifting, site-made joints, sealing, cable entry, electrical connection. | Instruction revision used, beside photographs of base and connections. Commissioning record. | Installer and manufacturer, against the same instruction. |
Use | The symptom follows how the sauna is operated, or a change made after handover. | User manual limits. Owner's account. Controller settings and logs, where they exist. | Dealer and manufacturer, against the user manual. |
Maintenance | Gradual onset over seasons, on parts the maintenance instruction asks the owner to look after. | Maintenance instruction. Maintenance record, or its absence. Dated photographs. | Dealer and manufacturer, against instruction and record. |
Not yet determined | Evidence points two ways, or is missing: no photographs before work, a part already replaced. | A named missing item, a named collector and a review date. | No one yet. The case stays open with a named owner. |
The last column names who confirms the origin, not who pays. Payment follows your supply contract and national law. The contract numbers are in Who Pays When Your Customer's Sauna Fails in Year Three?
One row can move. If your crew followed the installation instruction and its error or gap produced the fault, the cause sits with the product. On cause, a gap in the instructions is the maker's gap.
That's what makes a sauna fault a product issue: evidence that the cause was in the unit, or in its documents, when it left the manufacturer.
Which four comparisons separate the origins?
No single photograph sorts a case. Four comparisons do, and each fits on one line of the case note.
1. When did it first appear?
A fault seen at unpacking or first heat-up points towards the product. One where site work was done points towards installation. One that builds over seasons points towards use, maintenance or the material's durability. Points towards, not proves.
Here's how you check it. Ask for the first dated photograph or message, not a memory of it.
“First seen: [date], by [whom], after [event or none].”
2. Does it repeat?
One unit with one symptom is a case. The same symptom on the same configuration, at different sites with different installers, is a product signal.
Here's how you check it. Look across your own installed units, then ask the manufacturer whether that configuration has shown the symptom elsewhere. The factory sees every market it ships to. You see yours.
“Same symptom elsewhere: [none known / units and sites].”
3. What does the factory record show?
At Wood Architects we assemble and check every sauna in the factory before shipment, so the comparison has a fixed starting point. A clean record doesn't clear the product, though. A cause inside the material or the design won't show on shipping day.
Here's how you check it. Ask what record exists for that unit and set it beside your arrival photographs.
“Factory record: [matches arrival / differs / no record].”
4. Does the site match the instructions?
Three documents count: the installation, use and maintenance instructions, in the revision that came with the unit.
Here's how you check it. Photograph the site condition beside the instruction that describes it, and record each deviation. A deviation isn't a verdict. It has to be capable of causing this symptom.
“Against instructions: [installation / use / maintenance], revision [number], deviation [none / described / instruction silent].”
Why is “not yet determined” a legitimate status?
Because a wrong label is worse than an open one. Replace a part under the wrong origin and the evidence goes with it.
The status is legitimate when it names the missing item, the person collecting it and a review date. Without those it's a delay with a polite name. Keep every removed part, marked with the unit's identifier and the date.
An open origin doesn't pause what your customer is owed.
Under Article 11 of Directive (EU) 2019/771, a fault that appears within one year of delivery is presumed to have existed at delivery. That holds unless proved otherwise or ruled out by the nature of the fault. Member States may set two years. Outside the EU, check your national sales law instead.
For a specific dispute, ask the consumer authority in your customer's country or a lawyer there. This article isn't legal advice or a statement of our warranty terms.
When does a fault stop being a service case?
When someone has been hurt, or when you have reason to believe the sauna is dangerous. From then on, origin comes second.
The General Product Safety Regulation (GPSR), Regulation (EU) 2023/988, has applied since 13 December 2024. Article 3 calls a product dangerous when it isn't safe under normal or reasonably foreseeable use.
Under Article 12(4), a distributor with reason to believe a product it supplied is dangerous must immediately inform the manufacturer or importer. It must also see that corrective measures are taken and that the market surveillance authorities are informed through the Safety Business Gateway.
Article 20(3) adds accidents: a distributor who knows of one informs the manufacturer without undue delay.
Note the threshold. It's reason to believe, not proof.
The GPSR steps back where specific EU product law covers a risk. Whether it applies to your unit is covered in Does the GPSR Apply to Your Imported Outdoor Sauna?
Take the sauna out of use and tell the manufacturer immediately. The label can wait. The notice can't.
You don't need a new claims procedure. Pick one open file and write one of the five labels on it before anyone orders a part. A label with evidence behind it gets a decision. A photograph with the word defect gets a question back, and your customer waits.
Frequently asked questions
Is the seller liable for a sauna installation mistake under EU law?
Towards a consumer, in two situations. Article 8 of Directive (EU) 2019/771 treats incorrect installation as a lack of conformity when the seller installed the goods as part of the sale. It does the same when the consumer's installation mistake came from shortcomings in the seller's instructions.
Who has to prove where a sauna fault came from?
Towards a consumer, Article 11 of Directive (EU) 2019/771 presumes a fault appearing within one year of delivery existed at delivery. Member States may set two years. Between dealer and manufacturer the directive sets no such rule. The supply contract and national law do.
Can a sauna fault turn out to be a setting?
Yes. A heater or controller can be doing what its manual describes, and then the symptom is a setting. Read the manual for the exact model and note the configured settings before reporting a defect. If the behaviour isn't described there, ask the component's maker.
What should a dealer do while the cause is still unknown?
Label the case “not yet determined” and record the missing evidence, who is collecting it and the review date. Keep removed parts, marked with the unit's identifier. Don't change further parts to test a theory. A consumer's rights against the seller don't wait for the origin.
When does a sauna fault become a safety matter?
When an accident has happened or you have reason to believe the sauna is dangerous. Under Article 12(4) of Regulation (EU) 2023/988, a distributor must immediately inform the manufacturer or importer and see that the authorities are informed. Proof of origin isn't needed first.
1reading now
Get an email when Giedrius publishes
