The legal commercial fridge temperature in the UK is set for the food, not the fridge. Chilled food must be kept at 8°C or below: this is law in England, Wales and Northern Ireland and a recommendation in Scotland. Government guidance is to set the fridge itself to 5°C or below, so the food stays cold enough even when the temperature changes (GOV.UK, Food hygiene for businesses: chilling and freezing). Climate Flow Limited installs, services and repairs commercial fridges, display chillers, cold rooms and freezers across London and surrounding areas. This guide sets out what the rules say, how to check a unit and what to do when one runs warm.
What is the legal commercial fridge temperature in the UK?
The legal limit for chilled food is 8°C. In England the rule is in the Food Safety and Hygiene (England) Regulations. Under them, keeping food that is likely to support the growth of pathogenic micro-organisms or the formation of toxins at food premises at a temperature above 8°C is an offence (legislation.gov.uk, Food Safety and Hygiene (England) Regulations, temperature control requirements). GOV.UK gives the same 8°C legal figure for Wales and Northern Ireland. In Scotland, 8°C is recommended rather than required by law.
The offence is worded around the temperature of the food. A probe reading taken between packs therefore tells you more than the air temperature on the unit's display.
The 5°C setting is guidance, not a legal limit. It gives the unit a margin. Doors open during service and stock goes in and out, so the temperature inside moves. A fridge set at 8°C has no room left for any of that.
Do display chillers and cold rooms follow the same figures?
Yes. The 8°C rule is about the food, wherever it is held. A multideck is an open-fronted display chiller with several shelves, used in shops and cafés. A cold room is an insulated walk-in room kept at a chilled temperature. Both hold chilled food, so the same 8°C limit and 5°C setting apply. Our display chillers page covers multidecks and glass-door units, and the cold room installation page covers walk-in chillers and freezers.
The Regulations allow some flexibility, each with conditions:
- Service and display: there is a defence for chilled food kept for service or on display for sale for less than four hours, under the conditions the Regulations set out.
- Hot food: cooked or reheated food for service or display that needs to be kept at or above 63°C is exempt from the chill rule.
- Ambient-stable food: food that can be kept at ambient temperature for its shelf life with no risk to health is also exempt. The product's own storage instructions still apply.
The four-hour defence is not a general allowance. It does not cover food that has already been on display above the limit. A display chiller that cannot hold its temperature needs a repair. Working around the fault does not solve it.
What temperature should a commercial freezer run at?
Freezers are commonly run at -18°C or lower. That is the figure set by the retained law on quick-frozen foodstuffs. The temperature of quick-frozen food must be stable and maintained at -18°C or lower at all points in the product (legislation.gov.uk, retained rules on quick-frozen foodstuffs). That rule covers quick-frozen food as the law defines it. It is not a single legal limit for every frozen item, but it is the usual target for a commercial freezer or freezer room.
Defrosting belongs in the fridge as well. Bacteria can grow if defrosting food is kept between 8°C and 63°C. Frozen stock taken out to thaw should go into a chiller, not be left at room temperature.
How to check commercial fridge temperature each day
Every food business must make and follow a system for managing food safety (GOV.UK, Food hygiene for businesses). Temperature checks, and the records that go with them, belong inside that system. A routine many kitchens and shops follow:
- Check every fridge, display chiller, cold room and freezer at least once a day, starting at opening.
- Read the food, not just the display: use a clean, disinfected probe thermometer between packs.
- Write down each reading, the time and who took it.
- When a reading is high, note what you did, then check again afterwards.
- Check that door seals close fully and that doors are not left open during service.
What to do if a fridge or chiller runs warm
Move the food first. Put chilled stock into another fridge, a cold room or a cold area while the unit is looked at. If that is not possible, or you do not know how long the unit has been warm, ask your local council's Environmental Health team for advice on what can be kept.
The Regulations give a defence where food was above the chill limit for an unavoidable reason, such as equipment defrosting or a temporary breakdown. The defence covers a limited period only, consistent with food safety (legislation.gov.uk, Food Safety and Hygiene (England) Regulations, defences). The business has to prove the defence. A unit that runs warm day after day is not a temporary breakdown, and it needs a repair.
Do not top up refrigerant or open the refrigeration system yourself. Leave that to a refrigeration engineer.
When to call an engineer
Call an engineer when:
- a unit set to 5°C or below keeps reading above that on the probe;
- the temperature climbs during service and does not come back down;
- ice builds up inside, or water collects under or around the unit;
- the unit runs all the time, cuts out or shows an error code;
- a door seal is torn, or the door no longer closes properly.
Our commercial fridge and freezer repair service covers fridges, freezers and display units. The commercial refrigeration services page covers cold rooms, blast chillers, ice machines and planned maintenance. For a unit that has failed with food inside, Climate Flow offers 24/7 emergency callouts. When you call, tell us the equipment, the make, what it is doing and any error code on the display.
Getting commercial fridge temperature right comes down to three figures and one habit. Keep chilled food at 8°C or below, set the fridge to 5°C or below, and run quick-frozen food at -18°C or lower. Then take a probe reading every day and write it down. Climate Flow installs, services and repairs the equipment that holds those figures, across London and surrounding areas.
This guide is general information, not a survey or a quote for your site; every system is different, so an engineer needs to see yours before any work is priced.