Commercial refrigerators are essential for keeping your business running smoothly, whether you operate a restaurant, café, supermarket, or food production facility. When they fail, the result isn’t just inconvenience; it can mean lost stock, food safety risks, and expensive downtime.
To help you stay one step ahead, the Green Cooling team has outlined four common commercial refrigerator faults to look out for, along with what they might mean and when it’s time to call a professional.
1. Ice Build-Up Inside the Refrigerator
A thin layer of frost is normal, but excessive ice build-up is a warning sign that something isn’t working as it should.
Ice accumulation usually occurs when temperatures drop below 0°C, causing moisture to freeze on internal components. One of the most common causes is a faulty evaporator, which may require a manual defrost or technician visit.
Signs to watch for:
- Ice forming on shelves, walls, or products
- Thick frost on the evaporator coil
- Only part of the evaporator icing up (often caused by low refrigerant charge)
If you suspect low refrigerant levels or inconsistent frost on the coils, avoid guesswork—our engineers can check pressures, diagnose cooling inefficiencies, and safely recharge the system to restore proper performance.
2. Incorrect or Fluctuating Temperature
Your commercial refrigerator’s main purpose is to maintain a safe, stable temperature for stored goods. If the temperature rises too high, food quickly becomes unsafe. If it drops too low, products may freeze, affecting taste, texture, and usability.
Ideal temperature range:
+1°C to +9°C for pre-chilled food and bottled drinks.
Common causes of temperature issues:
- Faulty thermostat
- Blocked air vents
- Low refrigerant
- Dirty components affecting airflow
- Failing compressor or evaporator fan
Regularly checking internal temperatures, especially during warmer months, helps you catch issues early. If readings fall well outside the recommended range, our team can identify the root cause and carry out the necessary repairs.
3. Compressor Problems
The compressor is the heart of your commercial refrigeration system. When it’s not functioning correctly, the entire unit struggles to stay cool.
How to prevent compressor failure:
- Check your compressor every 90 days
- Remove dust, grease, debris, or hair from vents and surrounding areas
- Ensure adequate airflow around the unit
- Monitor its operating temperature
A compressor running too hot or working harder than normal may be warning you of a deeper issue. If you’re unsure how to check it safely, Green Cooling can talk you through it or arrange an engineer visit.
4. Lighting Problems
Lighting faults in multideck display fridges don’t just affect visibility, they can impact the way customers perceive product quality and may indicate electrical problems within the unit.
What to do:
- Replace faulty bulbs as soon as you notice dimming or flickering
- Always use the correct bulb type for your cabinet
- Avoid DIY repairs if electrical components look damaged
If you’re not sure which bulb your fridge requires, Green Cooling can help you select the right one and provide guidance on safe replacement.
Why Choose Green Cooling?
At Green Cooling, we specialise in delivering energy-efficient, environmentally responsible refrigeration solutions across the UK. With decades of industry experience, our engineers are committed to providing expert advice, fast diagnostics, and reliable repairs that protect your stock and keep your business compliant.
We also offer proactive maintenance plans designed to reduce breakdowns, extend equipment lifespan, and help businesses cut ongoing energy costs.
Conclusion
Keeping your commercial refrigerator in good working order is essential for protecting your stock, maintaining food safety, and avoiding costly disruption. By paying attention to early warning signs, such as ice build-up, temperature fluctuations, compressor issues, or lighting faults, you can prevent minor problems from becoming major failures.
Regular checks, consistent maintenance, and timely repairs not only extend the lifespan of your equipment but also improve energy efficiency and reduce long-term running costs.
If you want complete peace of mind, partnering with a specialist like Green Cooling ensures your refrigeration systems are monitored, maintained, and repaired by experienced industry professionals committed to reliability and sustainability.
Frequently Asked Questions
What are early warning signs that a fridge might soon fail?
Unusual noises, longer cooling cycles, and increased energy usage often indicate components are wearing out. Addressing these signs early can prevent a full breakdown and reduce repair costs.
How often should commercial fridges be professionally serviced?
Most manufacturers recommend at least two services per year, especially for units in heavy-use environments like restaurants or convenience stores. Regular servicing keeps cooling performance consistent and reduces unexpected failures.
Can door seals affect refrigerator efficiency?
Yes, damaged or loose door gaskets allow warm air to enter, forcing the fridge to work harder. This leads to higher energy costs and temperature instability. Replacing worn seals is an inexpensive but highly effective fix.
Are energy-efficient fridge upgrades worth it for older units?
Absolutely. Older systems often use more electricity and outdated refrigerants. Upgrading to modern, eco-friendly refrigeration can reduce energy bills, improve cooling reliability, and future-proof your business against environmental regulations.
Why does my fridge run constantly without switching off?
A fridge that never cycles off could indicate restricted airflow, faulty sensors, or insulation problems. Continuous running accelerates wear and increases energy consumption, so it’s best to have it inspected promptly.