Quick Answer: Why Is My Fridge Not Cooling in Hot Weather?

Hot weather can make your fridge work harder because it has to remove heat from inside the appliance while releasing that heat into an already warm room.

If your fridge is not cooling properly during a heatwave, first check the temperature setting, ventilation around the appliance, door seals, internal airflow, condenser area, nearby heat sources and room temperature.

Your fridge should generally remain between 0°C and 5°C for safe chilled food storage, according to UK government food-safety guidance.

If it remains above 5°C despite these checks, or you notice unusual noises, repeated clicking, leaking or a loss of cooling in both the fridge and freezer, professional diagnosis may be required.

Can Hot Weather Really Affect Your Fridge?

Yes. A refrigerator does not simply produce cold air. Its refrigeration system removes heat from inside the cabinet and releases that heat into the surrounding environment.

When your kitchen becomes unusually hot, the fridge has to work harder to maintain its normal internal temperature.

Manufacturers including Beko and Electrolux note that high ambient temperatures can cause a refrigerator compressor to run for longer. If the room temperature goes beyond the operating conditions intended for the appliance, cooling performance can also be affected.

This is particularly relevant during periods of unusually hot weather in London.

For example, the Met Office recorded a maximum temperature of 37°C in London on 13 August 2026 during the recent heatwave.

A fridge that normally works without difficulty may therefore run longer, feel warmer around its exterior or take more time to cool groceries during extremely warm conditions.

That does not necessarily mean the appliance is broken.

However, persistent poor cooling should not be ignored.

7 Things to Check If Your Fridge Is Not Cooling in Hot Weather

1. Check the Actual Temperature Inside Your Fridge

Do not rely only on how cold a bottle of milk feels.

Use a fridge thermometer to check the actual internal temperature.

UK food-safety guidance recommends keeping your fridge between:

0°C and 5°C

The Food Standards Agency specifically recommends using a fridge thermometer because the temperature shown by an appliance dial does not always represent the actual temperature inside the cabinet.

What should you do?

Place a fridge thermometer around the middle section of the refrigerator and allow the temperature to stabilise.

If the temperature is consistently above 5°C, check your appliance’s temperature control and consult the manufacturer’s instructions.

Many manufacturers recommend temperatures around 3°C to 4°C under normal conditions, although the correct setting can vary between models.

Important

Turning the fridge to its coldest possible setting is not automatically the solution.

If poor ventilation, damaged seals or a mechanical fault is causing the problem, changing the temperature control may simply make the appliance work harder without correcting the underlying issue.

2. Check Whether Your Fridge Has Enough Ventilation

Your refrigerator needs to release heat.

If it is pushed tightly against a wall, enclosed too closely by kitchen units or surrounded by stored items, warm air may build up around the appliance.

That can become more noticeable during hot weather.

Samsung explains that refrigerators require sufficient space around them so heat can dissipate effectively. The exact clearance depends on the appliance model, so the manufacturer’s installation instructions should always take priority.

Check around your fridge for:

• Very little space between the appliance and wall
• Boxes or objects blocking ventilation
• Dust around accessible ventilation areas
• Restricted airflow around integrated units
• Heat building up behind the appliance

If possible, improve the airflow around the refrigerator while following the installation requirements for your specific model.

Poor ventilation can make the compressor run for longer and reduce cooling efficiency.

3. Inspect the Fridge Door Seal

Inspect the fridge door seal carefully, as even a small gap can affect cooling performance during hot weather. The rubber gasket around the door is designed to keep cold air inside while preventing warm room air from entering. 

If the seal is dirty, cracked, loose, warped or damaged, warm air can continuously leak into the fridge, forcing the appliance to work harder to maintain the correct temperature. Over time, this can reduce cooling efficiency and place extra strain on the refrigeration system.

Simple door-seal check

Close the door carefully and inspect the entire edge.

Make sure food containers, shelves or bottles are not preventing the door from closing completely.

Clean dirty seals gently according to the manufacturer’s care instructions.

If the gasket has visibly split, become distorted or no longer forms a proper seal, replacement may be necessary.

4. Make Sure Food Is Not Blocking the Air Vents

An overloaded fridge does not necessarily stay colder. Refrigerators need enough space inside for cold air to circulate properly around the cabinet. 

When food packages are packed too tightly or pushed against internal vents, airflow can become restricted, leading to warm spots, uneven cooling, faster food spoilage and longer compressor running times. 

The Food Standards Agency also advises against overfilling refrigerators because sufficient space is needed for air to circulate and help maintain a safe, consistent temperature. 

Try this:

Rearrange your fridge so there is some space between items.

Avoid placing large containers directly against internal air outlets.

Also minimise unnecessary door openings during very hot weather.

Every time the door opens, warmer room air enters the fridge and the appliance has to remove that additional heat.

5. Check Whether the Fridge Is Near a Heat Source

Where your refrigerator is positioned matters more during summer.

A fridge placed beside:

• An oven
• A cooker
• A radiator
• A dishwasher producing significant heat
• A sunny window
• Direct afternoon sunlight

may have to work harder than an appliance positioned in a cooler part of the kitchen.

Samsung specifically recommends keeping refrigerators away from direct sunlight and other heat sources when investigating cooling problems.

If moving the appliance is practical and permitted by its installation requirements, positioning it away from excessive heat can improve its operating environment.

For integrated refrigerators, make sure the surrounding cabinetry and ventilation setup comply with the manufacturer’s installation specifications.

6. Check for Dust Around the Condenser and Ventilation Areas

A refrigerator has to get rid of heat.

Dust and debris around accessible condenser or ventilation areas can restrict airflow and make this process less efficient.

During normal weather, the appliance may still manage.

During a heatwave, that extra restriction can become much more noticeable.

Electrolux notes that adequate ventilation is important when a refrigerator compressor is operating for extended periods.

Before cleaning anything

Switch off and unplug the appliance if the manufacturer’s instructions require it.

Do not remove sealed panels, interfere with refrigerant components or dismantle parts of the refrigeration system yourself.

The design varies considerably between fridge models. Some appliances have accessible condenser areas, while others do not.

Check the manufacturer’s manual before attempting any maintenance.

If you are unsure, leave internal components to a qualified appliance engineer.

7. Consider the Room Temperature and the Fridge’s Climate Class

One of the most overlooked causes of summer cooling problems is simply the temperature of the room itself.

Every refrigerator is designed to operate within a particular ambient temperature range.

This is often identified through the appliance’s climate class, which can normally be found on the rating plate or in its documentation.

Electrolux advises checking whether the room temperature is too high relative to the appliance’s specified climate class, noting that excessive ambient temperatures can lead to insufficient cooling and longer compressor operation.

Beko similarly advises users to ensure the ambient temperature remains within the recommended range for their appliance.

This can become an issue in:

• Very warm kitchens
• Conservatories
• Utility rooms with poor ventilation
• Small enclosed kitchens
• Rooms receiving strong direct sunlight

If the refrigerator cools properly overnight but struggles during the hottest part of the afternoon, high room temperature may be contributing to the problem.

Is It Normal for a Fridge to Run Constantly During Hot Weather?

A refrigerator may run more frequently or for longer periods during hot weather, particularly when the room temperature is high or the door is being opened frequently.

That does not automatically indicate compressor failure.

Beko states that extended compressor operation can simply mean the fridge is working harder to maintain the required temperature.

However, there is an important distinction:

Running for longer while maintaining a safe temperature can be normal.

Running continuously while failing to cool properly can indicate a problem.

If the fridge remains above 5°C despite being given time to stabilise, further investigation is advisable.

Why Does My Fridge Feel Hot on the Outside?

Warm sides or a warm rear section are not necessarily signs that your refrigerator is overheating.

Refrigerators remove heat from inside the appliance and release it externally.

Samsung explains that heat can therefore be noticeable on the outside walls while the refrigeration system is operating.

During hot weather, the compressor may operate for longer, making this warmth more noticeable.

However, arrange an inspection if you notice:

• An unusually strong burning smell
• Electrical smells
• Smoke
• Repeated electrical tripping
• Extreme heat accompanied by loss of cooling
• Abnormal mechanical noises

If you suspect an electrical safety issue, stop using the appliance and seek appropriate professional assistance.

Why Is My Freezer Cold but My Fridge Is Warm?

If the freezer is still working normally but the refrigerator section feels warm, the issue may be related to poor air circulation between the two compartments rather than a complete cooling-system failure. 

Common causes include blocked internal vents, excessive frost build-up, restricted airflow, a faulty evaporator fan, a malfunctioning damper or temperature-control problems. 

Start by making sure the vents are clear and the fridge is not overloaded with food. If proper airflow cannot be restored or the cooling problem continues, it may be necessary to have the internal system inspected by a qualified appliance engineer. 

How Long Should I Wait for My Fridge to Cool Down?

A refrigerator will not always return to its target temperature immediately after loading a large amount of shopping, opening the door repeatedly, changing the temperature setting, cleaning the appliance, experiencing a power interruption or being exposed to unusually high room temperatures. 

In these situations, the fridge may need several hours to stabilise and restore the correct internal temperature. 

Follow the manufacturer’s guidance for your specific model and avoid repeatedly opening the door to check progress, as this allows more warm air inside. Instead, use a fridge thermometer to monitor the temperature accurately. 

When Does a Fridge That Is Not Cooling Need Professional Repair?

If you have completed the basic checks and your fridge still cannot maintain the correct temperature, there may be an appliance fault rather than simply a hot-weather issue.

Professional diagnosis may be needed if:

• The fridge remains above 5°C
• Both fridge and freezer sections are becoming warm
• The compressor repeatedly clicks but does not run normally
• You hear new grinding, rattling or abnormal mechanical noises
• The fridge stops cooling completely
• The fan is not operating correctly
• There is excessive frost despite correct use
• Water is leaking unexpectedly
• Cooling performance continues to deteriorate
• The appliance trips the electrical supply
• The problem continues after the weather becomes cooler

Potential causes can range from sensors and fans to thermostats, control components or refrigeration-system faults.

These problems generally require proper testing rather than guesswork.

Fridge Not Cooling in London? Top Freeze Can Help

If your fridge is still warm after completing the checks above, Top Freeze provides fridge and freezer repair services across London.

Top Freeze currently offers same-day or next-day appointments and repairs household appliances including fridges, freezers, washing machines, ovens and dishwashers across London.

A professional inspection can identify whether the problem involves airflow, temperature controls, fans, electrical components or another part of the refrigeration system.

Need a fridge freezer repair in London?

Call Top Freeze on 020 8586 7029 or book an appliance repair online.

Frequently Asked Questions

Can hot weather make a fridge stop cooling?

Yes. High room temperatures increase the amount of work required for a refrigerator to remove and release heat. The compressor may run for longer, and an existing problem such as poor ventilation or a weak door seal can become more noticeable.

What temperature should my fridge be during a heatwave?

UK food-safety guidance recommends keeping a refrigerator between 0°C and 5°C. Use a fridge thermometer to verify the actual temperature rather than relying only on the control dial.

Should I turn my fridge colder in hot weather?

Not automatically. First check ventilation, door seals, airflow and the manufacturer’s recommended temperature setting. Making the fridge excessively cold can increase workload without solving an underlying fault.

Why is my fridge running all the time in summer?

Higher room temperatures, frequent door opening, loading warm groceries or insufficient ventilation can make the compressor run for longer. Extended running can be normal if the appliance is still maintaining the correct temperature.

Is 7°C too warm for a fridge?

For normal household food storage, UK guidance recommends keeping your fridge between 0°C and 5°C, so a consistent internal temperature of 7°C is warmer than recommended.

Why does my fridge cool at night but get warm during the day?

The surrounding room may be substantially cooler overnight. During the afternoon, direct sunlight, cooking and higher ambient temperatures can increase the load on the fridge. If this happens repeatedly, check the appliance’s ventilation and specified operating-temperature range.

Does a fridge need space around it?

Yes. Refrigerators need adequate ventilation to release heat. The amount of clearance required varies by model, so check your manufacturer’s installation instructions rather than relying on a universal measurement.

When should I call a fridge repair engineer?

Consider professional diagnosis if the fridge remains above 5°C, stops cooling, produces unusual noises, leaks, repeatedly trips the electrics or continues struggling after ventilation, temperature, seals and airflow have been checked.

Keep Your Fridge Working Through Hot Weather

Hot weather can make your refrigerator work harder, but poor cooling does not always mean the appliance has failed.

Start with seven basic checks:

1. Measure the actual fridge temperature
2. Check ventilation around the appliance
3. Inspect the door seals
4. Clear blocked internal airflow
5. Keep the fridge away from excessive heat
6. Check accessible ventilation and condenser areas for dust
7. Check whether the room temperature suits the appliance’s operating range

Most importantly, monitor the temperature rather than relying on how cold the fridge feels.

If your refrigerator cannot stay at 5°C or below, the cooling problem deserves attention.

For persistent cooling issues, Top Freeze provides professional fridge freezer repair in London, with same-day or next-day appointments available.

Book a repair with Top Freeze or call 020 8586 7029. Or email at info@topfreeze.co.uk