An alarm does not by itself decide whether food is safe. First limit further warming, collect reliable facts and assess the product under the site's HACCP procedure.
In short: protect the batch, record time and temperature, remove the cause, assess the food and document the decision. Do not release or discard food by guesswork.
Step-by-step response
- Limit further warming. Keep the door shut and check whether the refrigeration unit has power.
- Isolate the affected batch. Do not mix it with stock known to have remained within limits.
- Record the facts. Note when the issue was found, the highest known temperature, likely duration and logger history.
- Measure product temperature correctly. Room air can change much faster than the food.
- Identify the cause. Common examples are an open door, power failure, iced evaporator, leaking gasket or an unusually large warm delivery.
- Assess safety. Use the product type, duration, actual temperature, label and approved HACCP procedure. If information is insufficient, ask the responsible food-safety person or relevant authority.
- Record the decision and prevention. Document release, treatment, return or disposal and the action that prevents a repeat.
Do not apply a four-hour rule automatically to every product. Do not refreeze a batch without assessment: lowering the temperature does not remove toxins or contamination that may already have developed.
Preventing common causes
- use a door-open alarm and maintain the closer and gasket;
- use continuous logging for higher-risk products;
- keep a power-failure plan and suitable backup storage;
- split large warm deliveries into manageable batches;
- keep airflow clear around the evaporator;
- check thermometers, drains, coils and alarms on schedule.
After the event, verify that the action worked. A return to the room setpoint does not prove that the product is safe or that the root cause has been removed.
Related articles
- Food-storage temperature limits
- HACCP records and temperature logs
- Room not reaching target temperature
Product disposition must follow a risk assessment, not the room-air display alone.
