The short answer
- If anything looks or smells unsafe, switch off and stop using the room. That includes scorching, a burning smell that isn’t a new heater’s first-use smell, sparking, or water where it shouldn’t be.
- Identify your equipment and find its manual. The manual’s troubleshooting table is written for your exact model.
- Make only the owner checks the manual allows: settings, timer, door, stones, vents, water supply valve, and whether the equipment is switched on.
- Don’t keep resetting. A tripped overheat protector, a breaker that keeps tripping or an error code that keeps coming back is telling you something. Find the cause first.
- Leave everything else to qualified people. Electrical work, overheat resets reserved to authorised people and opening the heater or generator are not owner jobs.
- Call us with the details: make, model, serial number, the symptom, any error code and photos. Our service page explains how.
Switch off, and don't keep resetting
Heaters and steam generators cut out to protect themselves and the room. If the equipment stops, trips or shows an error, switch it off at the control and let it cool. Don’t keep resetting a tripped protector or breaker in the hope it holds: Harvia’s manuals say the cause of an overheat trip must be found before anyone presses the reset button.
Step 1: identify your equipment
You can’t troubleshoot well, or get the right advice, without knowing exactly what is installed. A sauna may have a heater with built-in controls, or a heater plus a separate control panel and power unit. A steam room has a generator, usually in a plant space or cupboard nearby, and a control panel outside the steam room.
Find the type plate. Manufacturers fit a type or rating plate showing the model, type code, output and serial number. Its position depends on the product, and the manual’s component diagram shows where it is; Harvia’s Spirit manual, for example, marks the type plate and the serial number separately. Read it only where it is visible without removing covers, and never while the heater is hot.
Record and photograph:
- the type plate on the heater or generator (model, type or item code, serial number);
- the control panel, including any message or code on its display;
- for a sauna, the heater with its stones, from the front and from above (a cold heater only);
- for a steam room, the generator, its pipes and drain connections, and the steam outlet in the room;
- anything unusual: darkened timber, crumbled stones, water on the floor, scale at the outlet.
Why it matters: a model number, a code and a few photos let a technician narrow down the likely cause and bring the right parts, which often saves a second visit.
Step 2: find the manual
Keep the installation and use manuals with the room, for example in a sleeve in the plant cupboard or with your house documents, along with a note of the installer and the installation date. Harvia’s Spirit manual, for example, asks you to keep it for future reference.
If yours are lost, Harvia publishes manuals and data sheets on its website: search for the model on harvia.com and download the user manual from the product page. Match the manual to the exact type code on the plate, because similar-looking models can differ, and editions change over time.
Why it matters: a manual’s troubleshooting table, error-code list and overheat-reset instructions are model-specific. Advice for a different heater can be wrong for yours.
What an owner may check, and what an owner must not
Harvia draws the line clearly. Its sauna manuals say all service operations must be done by professional maintenance personnel. Its steam generator manuals mark the few points a user may check with an asterisk and leave all other maintenance to professionals.
| Owners can safely check | Leave to a licensed electrician or authorised service person |
|---|---|
| The control is on, set to heat, with a sensible temperature and on-time | Any electrical work: supply, wiring, connections, fuses inside equipment |
| The timer: on built-in-control models, it is set in the “on” section | Resetting the overheat protector where the manual reserves it to an authorised person |
| The sauna door is closed (if a door switch is fitted) | Opening the heater’s connection box, the generator’s cover or the control’s power unit |
| Nothing is on or against the heater or its safety switch | Replacing elements, sensors, valves, level sensors or circuit boards |
| The stones look in order and no element is showing (heater cold) | Checking or adjusting sensor positions and wiring |
| Vents are open as the room’s ventilation design intends | Any repeated tripping of a protector or breaker |
| Whether the equipment’s main switch is on, and whether the switchboard shows the circuit switched off or tripped (look, don’t keep resetting) | Water-side repairs to the generator: solenoid valve, discharge valve, internal parts |
| The steam generator’s water supply valve is open | Plumbing alterations to supply or drainage |
| The router and Wi-Fi, if the app won’t connect | Commercial servicing on the schedule the manual sets |
A note on words: in Harvia’s manuals, the “safety switch” is a small sensor mounted above the heater that detects if something has been placed on it. It is not the switchboard device Australians often call a safety switch.
On steam generators, Harvia’s manuals also allow non-professional users to empty the sediment cup, clean the water-level sensor and descale, following the manual’s steps. Allow about 24 hours of cooling first, as the manual asks, because the unit and its water are hot. If you aren’t comfortable doing it, leave it for the service visit.
Sauna: symptoms, likely causes and next steps
The table follows the troubleshooting sections of Harvia’s current heater manuals (Cilindro and Spirit) and its Xenio and Fenix controls. Your own manual governs.
| Symptom | Likely causes in Harvia’s manuals | Owner checks | Next step |
|---|---|---|---|
| Heater won’t heat | Timer not in the “on” section; thermostat set low; heater supply off or protection tripped; overheat protector tripped (the timer runs but the heater doesn’t heat) | Control on; timer in the “on” section; thermostat higher; door closed if a door switch is fitted; whether the circuit shows tripped | If the supply has tripped or the overheat protector has gone off, stop. Call a service person; don’t reset repeatedly |
| Heats slowly, or water cools the stones quickly | An element not glowing; thermostat set low; heater output too small for the room; stones packed too tightly, settled or the wrong type, restricting airflow; ventilation not arranged correctly | Thermostat setting; vents open; with the heater cold, look for settled or crumbled stones | Have the elements, stones and sizing checked. Our stones guide explains re-stacking |
| Room heats fast but water runs through the stones | Heater output too high for the room, so the air reaches temperature before the stones; ventilation | Vents open as designed | A sizing and ventilation question; talk to us |
| Stops or trips during use | Overheat protector, often from crumbled or compressed stones, a heater left on unused for a long time, a displaced or broken sensor, or a knock to the heater; supply protection tripping | Nothing on the heater; stones not visibly collapsed (heater cold) | Switch off. A repeat trip needs a qualified person to find the cause |
| Overheat cut-out | Same causes as above. The protector cuts power when the area around the sensor gets dangerously hot | Note what was happening when it tripped | Only a person authorised for electrical installations resets it, unless your manual says otherwise. On some models the button is inside the connection box |
| Smell | First heats of a new heater and stones (normal, ventilate); a hot heater makes smells already in the air stronger, such as paint, glue, heating oil or spices | Ventilate; look for anything on or near the heater | A burning smell from an established heater, or charring: switch off and call |
| Bangs, crackling or ticking | Stones cracking in the heat (occasional bangs); heater parts expanding as they warm; a mechanical timer ticks normally while running | Listen whether the timer ticks when the heater is off | Timer ticking while off: Harvia says check the timer’s wiring, which is an electrician’s job. New or loud noise: have it checked |
| Timber near the heater darkens quickly | Safety distances not met; packed or settled stones; elements visible between stones | With the heater cold, look for exposed elements | Re-stack per the manual, then have clearances checked. Harvia notes timber also darkens slowly with age and heat, which is normal |
| Control panel blank | Main switch on the power unit or heater off; data cable; fuses | Main switch on | Data cable and fuses are for a service person |
| Control switches off mid-session | Fenix: control panel or power unit getting too hot where installed | Note when it happens | Installation conditions need checking |
| Remote or app start won’t work | No door switch or safety device set up (remote use stays disabled); door open; 6-hour rest after switch-off; panel lock; Wi-Fi | Door closed; app and router connected | If no safety device is fitted, that is by design. Our controls guide explains why |
Why it matters: most “won’t heat properly” problems come back to three things: the stones, the heater’s size for the room, and the ventilation. Stones choke the airflow as they break down, which slows the sauna and makes the elements run hotter. It is the commonest cause of overheat trips too.
Error codes on sauna controls
Digital controls show status messages, which tell you why the heater is waiting, and error messages, which mean the control has cut power because something is wrong. On Harvia’s Xenio and Fenix controls an error shows as “E” plus a number. Examples from Harvia’s current manuals:
| Display | Meaning on Harvia Xenio and Fenix | Who deals with it |
|---|---|---|
| door | Status: the door switch circuit is open | Owner: close the sauna door |
| SAFE | Status: the safety switch above the heater is open | Owner: remove the object on the safety switch |
| rESt | Status: the pause (rest) time before a timed or remote start is active | Nobody: it is a built-in safety pause, not a fault |
| E1 / E2 | Temperature sensor measuring circuit broken / short-circuited | Service person: sensor wiring and connections |
| E3 | Overheat protector measuring circuit broken | Service person: overheat reset and sensor wiring |
| E5 | Combi or steamer: water level low, or the steamer’s overheat protector has engaged | Owner: add water (manual-fill models) or check the supply. If that isn’t it, call |
| E9 | Connection failure between the control panel and the power unit | Service person: cable and connectors |
The same code can mean different things on different products. E5 on a Harvia steam generator, for instance, is a water-level fault with its own checks. Always look the code up in the manual for your exact control or generator. Harvia’s Spirit manual says that if an error comes back after it has been rectified and cleared, contact your supplier.
Steam room: symptoms, likely causes and next steps
This table follows the troubleshooting sections of Harvia’s current HGX, HGD and HGP generator manuals, which share the same error list. Where another manufacturer explains a cause that Harvia doesn’t, the table says so. Our water quality guide covers scale in depth, and our steam generator maintenance guide explains service intervals, descaling and which jobs belong to owners and technicians.
| Symptom | Likely causes | Owner checks (Harvia’s asterisked points) | Next step |
|---|---|---|---|
| No steam or little steam | Water supply closed or low flow; water-level faults; scale; service overdue; overheat protector engaged; a generator too small for the room or a long, uninsulated pipe (design questions) | Water supply valve open; generator switched on at its main switch; any code on the panel | Service visit. If the room has never heated well, it is a sizing and design question: see our sizing guide |
| Hot water spitting at the outlet | Harvia requires the pipe to fall towards the room with no water pockets. Other makers explain that condensate trapped in a dip spits out as hot water; one also names deposits on the electrodes | Keep clear of the outlet | Service visit. Pipe falls and insulation are a plumbing matter |
| Water at or below the outlet, or on the floor | Condensate from the ceiling (normal in moderation; Harvia calls for a curved or sloped ceiling and notes small ceiling tiles cause more drips); overfilling from a fouled water-level sensor (another maker’s guidance); pipe falls; leaks | Floor waste clear; note where the water appears | Leaks or water from the outlet itself: service visit |
| Steam leaking at the generator | Harvia: a blocked nozzle or pipe makes steam vent from the overpressure valve, which must never be blocked | Switch off; keep clear | Service visit |
| Error code on the panel | Water-level, sensor or connection faults (see below) | Read the code; check the water supply valve | Look up the code in your manual; call for anything not marked as a user check |
| Service light flashing | 200 operating hours since the last service (Harvia) | — | Book the service; the counter is reset afterwards |
| Drain or flush problems | Water still in the reservoir after rinsing and discharge; reservoir already full when filling starts; the auto-drain stopped by switching off at the isolator | Use the control to switch off, so the automatic drain can run | Discharge valve and level sensor: service person |
| Scale at the outlet, in the sediment cup or in the reservoir | Hard water; descaling or flushing not done; auto-drain not running | Empty the sediment cup and descale only as the manual describes, after cooling | Repeated scaling: ask about water treatment. Harvia recommends a softener for hard water |
| Fragrance smell in the reservoir | Fragrance flowing back from the steam pipe (Harvia) | — | Service visit to check the fragrance connection |
| Panel won’t connect to the app | Wi-Fi off in the setup menu; router or internet | Restart the router; toggle Wi-Fi in the setup menu as the manual describes | Persistent faults: contact us |
Steam generator error codes (Harvia HGX, HGD, HGP)
| Code | Meaning | Owner check in Harvia’s table |
|---|---|---|
| E1 / E2 | Temperature sensor measuring circuit broken / short-circuited | None: service person |
| E3 | Overheat protector measuring circuit broken | None: the reset button is under the generator’s cover and is reset only by professional maintenance personnel, after the cause is found |
| E5 | Water level low | Water inlet |
| E7 | Water still in the reservoir after rinsing and discharge | None: discharge valve and level sensor |
| E9 | Connection failure between control panel and generator | None: cable and connectors |
| E10 | Reservoir empty after rinsing | Water inlet |
| E11 | Reservoir full when filling starts | None: discharge valve and level sensor |
| E13 | Too many fillings within five minutes | Water inlet and flow rate |
| E14 | Water level not reached within 10 minutes of switching on | None: measurement cup and wiring |
| E15 | Water level not maintained while steaming | Water inlet |
Why it matters: most steam generator faults are water faults. Supply, scale and the level sensor account for most of the codes, which is why water quality, descaling and the automatic drain decide how reliably a steam room runs.
Compliance and licensed trades
Electrical work on heaters, controls and steam generators must be carried out by a licensed electrician, following the manufacturer’s installation manual. Plumbing work on generators, water supply and drainage is for a licensed plumber. This guide gives no wiring or electrical instructions, and owner checks never include opening the heater’s connection box, the control’s power unit or the generator’s cover.
Warranty: keep the paperwork and follow the manual
Manufacturer guarantees depend on the equipment being installed, used and maintained as its manuals describe. Harvia’s heater and control guarantees can be voided if those instructions aren’t followed or non-recommended stones are used. Its steam generator guarantees also depend on meeting the water-quality table and the manual’s maintenance. Commercial use carries much shorter guarantee periods than family use.
Good practice is to keep:
- proof of purchase and of installation, including who installed and connected the equipment and when;
- the manuals, with the type plate details noted;
- a simple log of maintenance and servicing: stone re-stacking, descaling, service visits and any faults with their codes.
Why it matters: if a part fails, a clear record shows the equipment was looked after as the manufacturer asked.
Getting help
When you contact us, tell us the make and model (from the type plate), the serial number, the symptom, any code or message on the display, what you’ve already checked, and send a few photos. Our service page explains how a service request works, and our care guide covers the routine that prevents most of these problems.
BSC Wellness works with a dedicated electrical contractor, an independent business and a Harvia-authorised service agent, who carries out our electrical servicing.
Not sure if it's a fault?
If you can’t tell whether something is normal or a problem, switch off and ask us. A quick description, the model number and a photo are often enough for us to suggest the next step. You can reach us through our contact page or on 1300 788 488.