When your commercial refrigeration system starts failing, you lose inventory, money, and customer trust. The good news is that most breakdowns don't happen without warning: Your equipment tells you something's wrong days or weeks before it completely fails.

Our experienced commercial refrigerator technicians in Surrey see the same problems again and again, this is why in this article we’ll teach you how to spot these red flags early and the importance of acting early to avoid disruption, protect your stock, your staff, and your bottom line.

Frost and Ice Buildup

Ice buildup in your evaporator coils or walls means you have a problem. This happens when door seals fail, humidity creeps in, or defrost systems stop working, creating a frost coat that blocks airflow, forces the compressor to work harder, throws off internal temperatures, and drives up energy bills. If left unchecked, it damages components and leads to a complete system failure.

How to Fix It

Start by checking door seals and replace them if they're cracked or loose. Verify if the defrost timer works properly and if your evaporator coils are clean. Also, keep doors closed as much as possible. If frost keeps returning, you need a refrigeration technician in Surrey to test components, refrigerant levels, and check if the defrost heater needs replacement. Don't wait for the problem to worsen and cause permanent compressor damage.

Uneven or Unstable Temperatures

Food spoils faster, safety standards are harder to meet, and staff lose trust in the equipment when temperatures rise and fall without warning. Your refrigerator should hold steady temperatures. These fluctuating temperatures mean your compressor cycles too often, wasting energy and shortening its lifespan. This is a clear sign of failing sensors, airflow problems, or worn internal parts that need repair or replacement.

How to Fix It

First, check that products are not blocking vents, that settings are correct, and test your thermostat with a separate thermometer to confirm accuracy. Ongoing instability usually requires a technician to inspect the compressor relay, fan motors, sensors, and fix the cause to protect your stock and prevent sudden breakdowns.

Unpleasant Odours

Refrigerators don't create odours on their own. Strange or unpleasant smells coming from your commercial refrigeration unit signal serious problems. Sour or musty odours often point to mould growing on dirty coils, trapped moisture, blocked drains, a malfunctioning condenser, or even bacterial growth inside the system. These issues affect food safety, contaminating your stored products and violating health codes, which can put your business at risk.

How to Fix It

Check for refrigerant leaks, as they produce a distinct chemical smell, and clean or replace air filters if your unit has them. Remove spoiled items, clean visible surfaces and internal coils thoroughly to eliminate mould and bacteria. If odours return, a technician should inspect drain lines, internal components, and airflow paths, since persistent smells usually indicate component failure.

Unusual Noises

Unexpected noises such as grinding, rattling, or loud humming mean your unit is struggling. These sounds often come from failing motors, loose parts, worn bearings, or a compressor working overtime. Don’t ignore them, because if the noise stops suddenly, your unit has likely broken down completely, leading to costly repairs and downtime.

How to Fix It

Check for debris near the fan blades. If the area is clear, the problem is likely mechanical. Do not try to repair internal motors or compressors yourself. Rather, call a certified commercial refrigeration technician to identify the specific part failing and secure loose components, repair moving parts, or replace failing motors before you lose your inventory.

Water Leaks

If you notice leaks or water pooling around the cooler, be aware that it’s a sign of blocked defrost drain lines, cracked water line, frozen coils, or failing seals. It creates a dangerous slip hazard for your staff, floor damage, and increases the risk of electrical issues that disrupt daily operations.

How to Fix It

Clear visible drain blockages and check door seals for damage. However, stubborn leaks require a professional inspection of the drainage system, coils, internal lines, and commercial refrigeration repairs to protect both your equipment and your workspace, as well as prevent expensive water damage.

When to Call a Professional Refrigeration Technician?

Don't wait for a total breakdown to act. Call a technician as soon as problems affect temperature, safety, or daily operations. Here are common situations of when to call a commercial refrigeration technician in Surrey:

• If food spoils faster than normal
• If ice keeps coming back
• If smells do not clear
• If noises grow louder
• If temperature spikes
• If leaks are persistent

Delaying service increases damage and downtime. Trying to fix complex electrical components or compressor issues yourself is dangerous and can void your warranty.

Papa Plumbing’s technicians are experienced in commercial refrigeration repairs in Surrey to diagnose and fix the root cause before you lose your entire inventory. Call us or fill out the following form if you notice any of the warning signs.