Maintenance Guides / Pool & Hot Tub

Replace Sauna Heater Stones

Difficulty: moderateTime: 90 minsEst. Cost: $100 - $250

Why it matters

Broken stones reduce sauna efficiency, trap moisture, and can cause heater element overheating or failure ($800–2000 replacement).

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How to do it

  • 1

    Cool the sauna completely and ensure power is off

  • 2

    Remove the heater stone cover or grate (check manual for method)

  • 3

    Inspect stones for cracks, soft spots, or excessive dust; note which stones need replacement

  • 4

    Remove old stones and replace with kiln-dried basalt or soapstone rated for saunas; reinstall cover