Most commercial refrigeration faults announce themselves before the product is lost. The symptom you notice is rarely the cause, but it does narrow down where the cause lives. Below are five of the problems we are called out to most often in Toronto and the GTA, what each one usually points to, and the checks you can safely make yourself before calling a technician.
The Cabinet Is Not Holding Temperature
The most common complaint, and the one with the widest range of causes. Before assuming the worst, check the simple things: the set point has not been changed, the door closes fully, the gasket seals along its whole length, and the shelves are not packed so tightly that air cannot circulate.
Then look at heat rejection. A condenser blocked by dust, or a unit pushed against a wall with boxes stacked around it, cannot shed heat and will run continuously without reaching the set point. If the space is clear, the coil is clean and the door seals, the cause is inside the system and needs to be measured.
Frost or Ice Building Up
A layer of ice on the evaporator, on the ceiling of a walk-in, or around the door frame is a symptom, not the problem. It usually means warm humid air is getting in, or defrost is not completing.
Air entry comes from a gasket that no longer seals, a door left ajar, a failed door closer, or a damaged strip curtain. Defrost faults come from the timer, the heater or the termination sensor. Ice also blocks airflow through the evaporator, which is why a frosted unit often warms up in the cabinet even though the system is running.
The Unit Will Not Start
Start with power. Check the breaker, the outlet and the plug before anything else — a tripped breaker is a common and quick answer, though a breaker that trips repeatedly is telling you something and should not simply be reset again and again.
If power is present and the unit is silent, the cause is usually electrical: a control board, a start component, a relay or an overload. That work belongs to a technician.
Unusual Noise
Noise is useful because it locates the problem. A rattle or scrape is often a fan blade catching a guard or a loose panel. A grinding or buzzing that rises and falls with the fan points to a failing fan motor bearing. A hard clunk from the condensing unit when it starts or stops points at the compressor or its mounts.
A new noise rarely fixes itself. It is usually cheaper to deal with a fan motor than with what happens after it seizes.
Water Under or Inside the Cabinet
Water on the floor is almost always drainage rather than a leak of refrigerant. Defrost water is meant to leave the cabinet through the drain line and evaporate in the pan. When the line blocks with debris or freezes, the water backs up and finds another way out.
Inside the cabinet, standing water on the floor of a walk-in points at the same drain, at ice melting from a frosted evaporator, or at a door seal letting warm humid air condense inside. All three are worth attending to early — a wet floor in a cold room is a safety issue as much as an equipment one.
Contact CooperFix
If the simple checks come back clean and the cabinet still misbehaves, the cause is inside the system and needs measurement rather than guesswork. CooperFix services commercial refrigerators, freezers, walk-in coolers, walk-in freezers and display cases across Toronto and the GTA. Call (647) 483-3777.