Zanussi ZFT10101WA, the red alarm indicator light has been flashing now for well over 48 hours. Temp was at minus 16, I've adjusted it slightly to minus 18 but the red still flashes.

Warning light (red)
If the temperature warning light (4) lights up, it
indicates that the temperature within the freezer has
reached a level where the safe food storage is no
longer ensured. When the freezer is first switched on, the warning light will stay on until the temperature has dropped to
a safe level for the storage of frozen food.

Temperature acoustic alarm
This appliance incorporates an alarm which gives off
an audible signal whenever the warning light comes
on. This signal can be temporarily stopped by
depressing the push button for fast-freezing (6).
The fast-freezing push button can be released as
soon as the warning light is off.

Open door acoustic alarm
This appliance also incorporates an alarm which
sounds if the door is left open for more than 60
seconds. The signal will be stopped when the door is
closed again.

Dado

Because it does not achieve the correct temperature (for example: -18 degrees centigrade).
For a more precise answer I need more information.
A lot of things may be incorrect:
- Doesn't work defrosting cycle
- The cooling fan is not working
- Too much ice on the evaporator battery
- Faulty thermostat or NTC sensor
- Faulty cooling system (gas leak)
- Compressor
- Electronic

Dado

Under normal operating conditions, the internal
temperature of the freezer will ensure the longterm
conservation of the stored food.
When such temperature rises above a certain
level (-12 °C), the appliance will trigger an
acoustic and light alarm. The light alarm is a
blink red light (Red Alarm Indicator Light), while
the acoustic alarm is an intermittent sound.
You can stop the acoustic alarm by pressing
the Acoustic Signal Stop Switch once.
When switching on the freezer for the first
time, the Red Alarm Indicator Light will
blink until the internal temperature has reached
a level required for the safe conservation of frozen
food.

Dado

Under normal operating conditions, the internal
temperature of the freezer will ensure the longterm
conservation of the stored food.
When such temperature rises above a certain
level (-12 °C), the appliance will trigger an
acoustic and light alarm. The light alarm is a
blink red light (Red Alarm Indicator Light), while
the acoustic alarm is an intermittent sound.
You can stop the acoustic alarm by pressing
the Acoustic Signal Stop Switch once.
When switching on the freezer for the first
time, the Red Alarm Indicator Light will
blink until the internal temperature has reached
a level required for the safe conservation of frozen
food.

Dado

Starting the Appliance
Insert the plug into the wall socket. The green pilot light will illuminate to show that the appliance is switched on. The red alarm light will also illuminate until the freezer reaches the correct temperature.

Alarm Light
The red alarm light will illuminate when the temperature in the freezer is higher than the thermostat setting. This alarm light will illuminate if:
- The appliance has just been started.
- Fresh food has been put in the freezer.
- The lid has been left open, opened frequently or open for too long.
The red light will go out when the freezer has returned to the correct temperature

Dado

Red Alarm Indicator Light
Under normal operating conditions, the internal temperature of the freezer will ensure the long-term conservation of the stored food. When such temperature rises above a certain level (-12 °C), the appliance will trigger an acoustic and light alarm. The light alarm is a blink red light (Red Alarm Indicator Light), while the acoustic alarm is an intermittent sound.
You can stop the acoustic alarm by pressing the Acoustic Signal Stop Switch once.

When switching on the freezer for the first time, the Red Alarm Indicator Light will blink until the internal temperature has reached a level required for the safe conservation of frozen food.

Fast Freeze function
If more than 3-4 kg of food is to be frozen:
1. Press the Fast Freeze Switch for 2-3 seconds to activate the fast-freeze function 6-24 hours before placing the fresh food in the freezer, the Yellow Fast Freeze Indicator Light will illuminate. The compressor will now run continuously, to ensure that the fresh food is frozen as quickly as possible.
2. It is possible to deactivate the function at any time by pressing the Fast Freeze Switch for 2-3 seconds.
3. Place the foods in the freezing compartments (indicated with graphics).
4. Once the food is completely frozen (it may take up to 24 hours) you can manually switch off the fastfreeze function by pressing the Fast Freeze Switch for 2- 3 seconds and the Yellow Fast Freeze Indicator light will also go out.
5. Move frozen food from the freezing compartments into the other compartments (storing compartments) to make room for another freezing.

If the Fast Freeze Switch is accidentally left on, the fast-freeze function will be automatically switched off 48 hours later. The Yellow Fast Freeze Indicator light will also go out.

I believe that you all understand. If you intend to freeze larger amount of food then certainly a few hours before some shopping switch on the fast freeze function.

Dado

Red Alarm Indicator Light
Under normal operating conditions, the internal temperature of the freezer will ensure the long-term conservation of the stored food. When such temperature rises above a certain level (-12 °C), the appliance will trigger an acoustic and light alarm. The light alarm is a blink red light (Red Alarm Indicator Light), while the acoustic alarm is an intermittent sound.
You can stop the acoustic alarm by pressing the Acoustic Signal Stop Switch once.

When switching on the freezer for the first time, the Red Alarm Indicator Light will blink until the internal temperature has reached a level required for the safe conservation of frozen food.

Fast Freeze function
If more than 3-4 kg of food is to be frozen:
1. Press the Fast Freeze Switch for 2-3 seconds to activate the fast-freeze function 6-24 hours before placing the fresh food in the freezer, the Yellow Fast Freeze Indicator Light will illuminate. The compressor will now run continuously, to ensure that the fresh food is frozen as quickly as possible.
2. It is possible to deactivate the function at any time by pressing the Fast Freeze Switch for 2-3 seconds.
3. Place the foods in the freezing compartments (indicated with graphics).
4. Once the food is completely frozen (it may take up to 24 hours) you can manually switch off the fastfreeze function by pressing the Fast Freeze Switch for 2- 3 seconds and the Yellow Fast Freeze Indicator light will also go out.
5. Move frozen food from the freezing compartments into the other compartments (storing compartments) to make room for another freezing.

If the Fast Freeze Switch is accidentally left on, the fast-freeze function will be automatically switched off 48 hours later. The Yellow Fast Freeze Indicator light will also go out.

I believe that you all understand. If you intend to freeze larger amount of food then certainly a few hours before some shopping switch on the fast freeze function.

Dado

Alarm will sound if the temperature of the freezer rises to unsafe levels. An indicator light will flash and continue to flash until the temperature reaches a safe level. The buzzer will also sound and will continue for 48 hours unless a safe condition exists.

it will do that till temp is reached

you have a refrigeration issue partner let her go 16 yrs. is good service you can replace it for 3 to 5 hundred the repair will be that IF you can find someone with the r-12. don't go for a top it off and go deal the food you lose is to expensive for that to be economical.