Sterra X — Noisy or Loud Sound from the MachineUpdated 2 days ago
It is normal for your Sterra X to make a soft, low hum while it is actively heating or cooling your water. However, if your machine suddenly begins emitting a loud rattling, intense buzzing, or heavy vibrating noise, the internal cooling system needs a quick reset.
When the internal cooling thermostat gets stuck, the machine keeps chilling the water indefinitely. This creates a thick block of ice inside the core housing. As the internal cooling fan spins, its blades can strike this ice buildup, creating a loud, rhythmic noise.
Follow these 3 simple steps to safely defrost the machine and quiet the noise:
The Defrost & Ventilation Reset Sequence
1.1. Execute a complete 2-hour defrost cycle: Melts internal ice buildup.
Turn the power switch located at the back of your Sterra X OFF and pull the power plug completely out of the wall outlet. Leave the machine entirely disconnected and resting for at least 2 full hours. This breaks the cooling cycle and allows any internal ice formations to safely melt.
2.2. Move the machine to establish 15cm wall clearance: Reduces vibration echoing.
While the machine rests, check its positioning. Ensure your Sterra X has at least 10cm to 15cm of completely open space on all sides, especially the back. If the machine is pushed tight against a wall or counter edge, its natural motor vibrations will echo loudly against your cabinetry.
3.3. Re-power and monitor the acoustic output: Verifies noise elimination.
Plug the machine directly back into a working wall outlet and turn it on. Listen closely over the next 30 minutes. Now that the internal ice block has melted and proper airflow spacing is established, the loud rattling or buzzing should be completely gone.
What if the loud noise returns after a few hours?
If the machine is quiet immediately after its 2-hour rest but begins roaring, buzzing, or rattling again later in the day, it confirms that your cooling coil thermostat is faulty. The rest melted the ice, but the broken thermostat is causing the ice to build right back up.
Log in to our Customer Support Portal.
Submit a support ticket describing the issue.
Attach a short video (at least 1 minute long) showing the error happening. This will help our technical team diagnose and resolve the issue much faster for you.
Thank you for your patience, and we look forward to getting this sorted out!