Expert repair guides
Heating failures are most often caused by limescale buildup or faulty temperature sensors.
Descale the boiler with an approved descalant solution.
Reviewed October 2026: refreshed with universal checks, brand-specific next steps, and safer repair triage.
Use this page to isolate the affected system. Then move to the brand guide for Nespresso, Krups, DeLonghi, Jura, Keurig, Philips Saeco, or your specific machine.
This is one of the most reported coffee machine problems. Heating failures are most often caused by limescale buildup or faulty temperature sensors. The fix varies by machine type and brand.
These steps work across all major brands:
Scale buildup reduces efficiency. Descale to restore normal heat-up time of 30-60 seconds.
Yes, limescale is the #1 cause of heating problems. It insulates the element and causes failure.
Vinegar works in emergencies but may leave residues. Use manufacturer-approved descalant for best results.
Most machines brew at 90-96°C (195-205°F). Lower temperatures cause under-extraction.
Faulty thermostat or thermal cutoff. The machine may be overheating due to scale or failing element.