Finnish sauna spare parts

Spare parts for Finnish saunas

The 6 spare parts on this page cover the part of a Finnish sauna that actually does the work: the heater, with its elements and controls, and the lava stones. These are the two components subject to wear simply by working at high temperature, cycle after cycle.

The stones: the only routine maintenance

Lava stones store the heat from the element and release it into the air; when water is poured over them, they generate the steam. Through repeated heating and cooling cycles they crack and crumble, and when that happens they stop doing their job: heat is no longer stored properly and the steam becomes weak. Check them once a year and replace them when they show cracks or leave fragments at the bottom. It is the only routine maintenance a Finnish sauna requires, and it should be done with the heater completely cold.

The heater: output and replacement

Heaters differ by output, sized against the cabin volume: an undersized heater never reaches working temperature, an oversized one consumes without benefit. If the heater is being replaced, the output must match the original for the model. The work involves live components on a dedicated circuit and should be entrusted to a qualified electrician, who issues the certificate of conformity.

Frequently asked questions about Finnish sauna spare parts

How often should the stones be changed? An annual check, replacement when they appear cracked or crumbling. With heavy use it may be needed sooner.

How should they be arranged in the heater? Without packing them, leaving air to pass between them: too tight an arrangement blocks circulation and makes the element work badly.

The sauna does not reach temperature: is it the heater? It may be, but check the condition of the stones and the door seal first. Those causes are more common and far less expensive.

Can I replace the heater myself? No. It is an electrical component on a dedicated circuit: a qualified electrician is required.