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Error code · Coffee Machine

Thermador Coffee Machine “Overvoltage or undervoltage” message: Supply Out of Range

The display on a TCM24TS or TCM24PS built-in coffee machine shows Overvoltage or undervoltage and the machine stops. The manual says the voltage is too high or too low. That points to the electricity supply, not…

Moderate · have it inspected
Code
Overvoltage or undervoltage
Appliance
Coffee Machine
Brand
Thermador
Warranty
30-day workmanship

What Overvoltage or undervoltage means

The display on a TCM24TS or TCM24PS built-in coffee machine shows Overvoltage or undervoltage and the machine stops. The manual says the voltage is too high or too low. That points to the electricity supply, not to the brewing parts. It tells you to contact the electricity or grid provider and have the supply checked by an expert before using the machine again.

Usual causes of Overvoltage or undervoltage

  • Supply voltage above the allowed range
  • Supply voltage below the allowed range
✓ A safe check worth trying

1. Switch the coffee machine off. 2. Check whether lights or other appliances behave oddly, which hints at a supply issue. 3. Contact your electricity provider about the voltage. 4. Have the supply checked by a qualified electrician. Do not open the machine or its wiring yourself, and call us only once the supply is confirmed normal.

! Why you should stop here
  • Voltage on the house wiring is for the utility or an electrician, not something a coffee machine repair can correct.
  • Running the machine on an unstable supply can damage its electronics.
Taking off a panel yourself does not by default void a manufacturer warranty, yet it can lead to accidental damage, and some manufacturers attach their own service terms. Read your warranty paperwork, or ask us, before you decide.
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More Coffee Machine codes

Overvoltage or undervoltageOvervoltage or undervoltage questions
Is my coffee machine broken?

Probably not. The message says the voltage is too high or too low, so the supply is the first place to look. Once an expert confirms it is normal and the message remains, we can test the machine.

Who should I call first?

The manual says to contact your electricity or grid provider and have the supply checked by an expert. That means the utility or a licensed electrician, since both a measurement and possible wiring work are involved.

Can I keep brewing meanwhile?

We would not. Switch the machine off until the supply has been checked, because repeated voltage swings can harm the electronics and the message means the machine has already stopped.

Request service

Is Overvoltage or undervoltage still showing?

Our technician checks it in your home and hands you a written price before touching anything.