Thermador Refrigerator LOW-POWER: Mains Voltage Below the Limit

What LOW-POWER means

The display on an older built-in bottom-freezer model, from the T30IB800 and T30BB810 era, reads LOW-POWER. The manual says the mains voltage has dropped below the permitted limit. This is a message about the electricity coming into the home, not a broken cooling part, and it goes away once the voltage recovers. If it lasts, the manual advises telling the energy supplier.

Usual causes of LOW-POWER

Mains voltage dipping below the permitted limit
A weak supply to the home or the circuit during heavy local demand

✓ A safe check worth trying

1. Do not open the doors more than you need to, so food stays cold while you wait. 2. Watch the display and see whether LOW-POWER clears by itself. 3. Check whether other appliances or lights are dimming, which suggests a household supply issue. 4. If the message lasts, contact your energy supplier. Call us only if it stays after the supply is confirmed normal.

! Why you should stop here

Voltage is the supplier's or an electrician's job, and an appliance technician cannot fix a weak supply from inside the refrigerator.
Running a unit on a poor supply for long periods can stress the electronics, so the supply should be sorted out first.

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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LOW-POWERLOW-POWER questions

Is LOW-POWER an error in the refrigerator?

Not in the usual sense. The manual treats it as a low mains voltage warning that clears when the voltage comes back. The appliance is telling you about the supply, not reporting a damaged part.

Should I call the electric company?

Yes, if the message lasts. The manual says to inform the energy supplier when it stays on the display. A short-lived message that goes away is normally just a brief dip.

Will my food spoil?

Keep the doors closed as much as possible while the message is showing. If the refrigerator stays cold and the message clears, there is usually nothing more to do. If temperatures rise, give us a call.