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Error code reference

Miele Refrigerator Error Code nA

Freezer interior too warm after a break in power supply.

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Freezer interior too warm after a break in power supply.

First step from the service manual

Press the alarm button; display shows the warmest temperature reached during the power outage for approximately 1 minute.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What nA means on a Miele refrigerator

The nA error code on a Miele refrigerator is a post-power-outage temperature alert specific to the freezer compartment. It indicates that during a period when the unit lost electrical power, the freezer interior temperature rose above safe levels. This is not a component failure code in the traditional sense; it is an informational alarm designed to alert users that frozen food may have been exposed to temperatures warm enough to compromise its safety or quality. The unit logs the peak temperature reached during the outage and holds that data for retrieval.

When the nA code appears, pressing the alarm button causes the display to show the warmest temperature recorded inside the freezer during the power interruption, and this reading remains visible for approximately one minute. This peak temperature reading is critical for assessing food safety. If the freezer climbed above 0 degrees Fahrenheit (minus 18 degrees Celsius) for a sustained period, perishable frozen goods may require inspection or disposal.

Once power is restored, the refrigerator will resume normal cooling operation. The nA code itself does not indicate that any sensor, compressor, or control board component has failed. However, if the alarm persists after power has been stable and the unit has had sufficient time to return to set temperatures, a separate underlying issue such as a door seal problem, a refrigerant concern, or a compressor fault may be present and should be investigated further.

Source: manufacturer service documentation.

Common causes of nA

  1. 01

    Power outage or interruption

    Wiring / connection

    The most frequent cause is a household power outage, tripped circuit breaker, or the unit being unplugged. The freezer warms naturally without power, and the nA code is triggered when the interior temperature exceeds the acceptable threshold during that period.

  2. 02

    Door left open or ajar during power loss

    Wiring / connection

    If the freezer door was not fully closed before or during the power outage, warm ambient air would have accelerated interior temperature rise. Inspect the door gasket and hinges to confirm a proper seal is achieved when closed.

  3. 03

    Worn or damaged door gasket

    Part replacement

    A compromised door gasket may allow warm air infiltration even during normal operation, making the freezer more vulnerable to rapid temperature rise during any power interruption. Check the gasket for cracks, tears, or areas that do not contact the cabinet evenly.

  4. 04

    Large amount of warm food recently loaded

    Wiring / connection

    Placing a significant quantity of unfrozen or partially thawed food in the freezer shortly before a power event can raise the interior temperature enough to trigger the nA alarm once power is lost. This is a normal response to thermal load.

  5. 05

    Underlying cooling system issue

    Part replacement

    If the nA code reappears without a clear power interruption, or if the freezer fails to return to set temperature after power is restored, there may be an issue with the compressor, refrigerant charge, or evaporator that requires professional diagnosis.

See the test procedure for each cause

Frequently asked questions about nA

What does nA mean on a Miele refrigerator?
The nA code on a Miele refrigerator means the freezer compartment became too warm during a break in the power supply. It is an informational alert, not a component failure warning. When you press the alarm button, the display will show the highest temperature reached inside the freezer during the outage for about one minute. This allows you to assess whether your frozen food is still safe.
How do I clear the nA code on my Miele refrigerator?
Press the alarm button to acknowledge the alert and view the peak temperature recorded during the power interruption. Once power is stable and the freezer returns to its set temperature, the nA code should clear on its own. No component repair is required if the cause was simply a power outage.
Will resetting the refrigerator clear the nA error?
Pressing the alarm button is the intended way to respond to the nA alert, and this will display the recorded peak temperature for approximately one minute. The code is designed to persist until acknowledged so that food safety can be evaluated. If the code reappears after a reset without a new power event, investigate for a possible underlying cooling or door seal problem.
Is my food still safe after the nA alert on my Miele freezer?
Food safety depends on the peak temperature shown when you press the alarm button and how long the outage lasted. If the freezer stayed at or below 0 degrees Fahrenheit (minus 18 degrees Celsius) throughout the outage, food is generally considered safe. If the temperature climbed significantly above that threshold for an extended period, frozen items, especially proteins and dairy, should be inspected carefully and may need to be discarded.
How much does it cost to repair a Miele refrigerator showing the nA code?
In most cases, the nA code requires no repair at all since it is triggered by a power outage rather than a parts failure. If an underlying issue such as a faulty door gasket or cooling system problem is identified, repair costs can range from around 50 to 150 dollars for a gasket replacement up to several hundred dollars or more for compressor or refrigerant-related work, depending on the specific fault and labor rates in your area.

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