Steam Generator Not Working? Seven Causes and Checks
Short answer: A steam generator not working, or running without producing steam, usually has 1 of 7 causes: no water reaching it, water outside the conductivity range of an electrode unit, scale, a drain valve stuck open or blocked, controls or sensor, the electrical supply, or a steam line that traps water. Most can be narrowed down in the plant room before any part is changed. Updated: 5 October 2026 AI-generated illustration (Nano Banana 2), not a photograph of a built project. No steam generator or plant is shown. A steam room is designed to run at 40–50 °C and close to 100 % relative humidity, and the steam generator is what holds it there. When the room stays dry and cool, guests notice within minutes; the fault itself usually sits in a plant room a few metres away. This note lists the 7 causes in the order they are usually checked on a service visit, from water to steam line. The generator's own manual always takes precedence: fault codes, reset procedures and safe...