Machine powers on but does not heat; no hot water or steam.

Safety first: Turn OFF, unplug, and allow the machine to cool. Heating circuits are at mains voltage.

• Check warm-up time: Allow at least 20–30 minutes. If the boiler temperature does not rise at all, continue.
• Inspect thermostats: Remove the cover and locate the thermostats or thermal cutouts on each boiler. Press any manual reset buttons. If they click, they had tripped.
• Check wiring: Verify that the heater terminals on the boiler are firmly connected and not burnt.
• Measure element resistance (advanced): Disconnect the heater leads and measure resistance across the element. An open circuit indicates a failed element that must be replaced.
• Control board: If the element is good but never receives power, the heater triac/relay on the control board may be defective and should be replaced by a technician.