Autoclave Repair Tips

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Tuttnauer Tips: What Causes The “Low Water” Message On The Tuttnauer EZ Series

Tuttnauer EZ Series Autoclave Troubleshooting

The Low Water Message
(Includes the Tuttnauer EZ9 Tuttnauer EZ10 & Tuttnauer EZ10K)

The Low Water Message is displayed on the Tuttnauer EZ Series  if, during the Water Inlet stage, insufficient water enters the chamber.
In Tuttnauer units with water pumps, the pump will try three times to fill the chamber with water if unsuccessful the cycle is aborted and the message LOW WATER is displayed.
This message is displayed if during a normal heat up stage the system determines that there is insufficient water in the chamber to complete the cycle.
This determination is made by the combined input of two sensors, the Tuttnauer Water Electrode and the Tuttnauer Safety Thermostat.
Also if a power failure occurs during the heat or sterilization stage, after the power returns, the system will check the Water Electrode to see if there is sufficient water in the chamber in order to resume the cycle.
 If not the cycle will be aborted, the message LOW WATER will be displayed, and the Cycle Fail indicator will light.

Possible Causes


  • A dirty or shorted Water Electrode
  • A clogged water pump or water pump filter
  • A clogged water line
  • Tuttnauer is improperly leveled
  • The Air Outlet Valve is stuck closed
  • A leaky door gasket, door bellows, solenoid valve, safety valve, or the air jet is allowing steam to escape at a higher than normal rate
  • A power down has occurred and on power up the water electrode tip is dry


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