Cooling service: when to call equipment

A cooling failure in a catering business is not just an inconvenience; it risks spoiling stock and losing revenue. Most faults do not occur overnight, days or even weeks beforehand, the unit sends signals that operators can notice before temperatures rise outside the safe range. Those who can read these signs will call for service before a minor issue becomes a weekend disaster when the store is full and the technician does not arrive until Monday.

Signs that you you will notice first

• Heavier frost on the evaporator or around the door seals, not just a thin layer of hoarfrost.
• The temperature in the display case fluctuates or fails to drop to the set value over an extended period, even though the doors are rarely opened.
• The compressor runs practically non-stop and never switches off to idle: a properly functioning unit should cycle on and off, not run at full capacity without a break.
• Unusual noise: squeaking, knocking or humming that differs from what is normal for the unit.
• A puddle of water under the unit or a frozen floor around the outdoor unit.
• Increased electricity consumption on the bill without an apparent reason.

What to check yourself before you call

Before calling the service, the operator can check a few things themselves and avoid an unnecessary visit.

• Door seal integrity - simple paper strip test: close the door on a piece of paper; if it can be pulled out without resistance, the seal is worn out.
• Condenser grille clearance - is not obstructed by furniture or boxes, nor clogged with dust and grease from the kitchen.
• Thermostat setting - sometimes the cause is simply a target temperature that has been accidentally adjusted, not an actual fault.
• Direct sunlight or heat from the stove, which strikes the unit and unnecessarily burdens it.
• Clear space around the unit - The unit requires airflow; boxes or shelving placed directly against the grille impair the condenser's operation.
• Supply cable and circuit protection - a loose plug or an undersized fuse can cause symptoms similar to a compressor fault; it is worth ruling these out first.

When to call equipment

• Frost returns even after removing obvious causes, such as tightened doors or a cleaned grille.
• The temperature has remained outside the safe range for more than a few hours and your own intervention has not improved the situation.
• Suspicion of refrigerant leak, oil stain under the unit or hissing sound; never top up refrigerant yourself, this is work for a certified technician.
• The circuit breaker trips repeatedly, or the unit appears overloaded even after clearing the surrounding area.
• Any repair requiring access to the refrigeration circuit is no longer a matter of skill, but of authorisation and certification.

HACCP and temperature records general

Recording the temperatures of refrigeration and freezing equipment is a standard obligation for catering operations: typically recorded regularly to provide proof that food has been stored within the correct temperature range at all times. Regular servicing and this record-keeping are closely linked: documents regarding inspections and repairs form part of the records maintained by the operator for internal control and for any potential inspection.

The simplest approach is to record both measured temperatures and service interventions in one place, so you have an overview of when the unit started causing problems and what has been done since then. For commercial operations, this overview is usually maintained by the cooling supplier together with the operator under a service contract, meaning nothing needs to be looked up retrospectively during inspections or warranty claims.

Why a quick response is worth it

In the vast majority of cases, the cost of a service intervention is lower than the value of goods that will spoil in a decommissioned box or cabinet over a single weekend. For a smaller refrigerated box containing meat or dairy products, this can easily amount to tens of thousands of Kč in a single delivery, and even more for a larger freezer room. Therefore, it pays to take early warning signs seriously and not wait until fluctuating temperatures lead to a complete failure: a minor seal repair or part replacement is significantly cheaper than disposing of spoiled raw materials and explaining to customers why the food suddenly tastes different. A service contract with priority support also addresses what happens if repairs are delayed: delivery of a mobile backup box ensures goods do not go to waste while waiting for spare parts.