By Commercial Service Company · November 4, 2026
Undercounter refrigerators and freezers get asked to do a lot in a small footprint. They sit under prep tables, next to fryers and ranges, packed tight with product, and they're expected to hold temperature all shift, every shift. It's no surprise they tend to wear out faster than reach-ins or walk-ins. Most of the time, the reason isn't a bad unit — it's the conditions it's running in.
Heat From the Cook Line Shortens Compressor Life
An undercounter unit installed next to a range, griddle, or fryer is working against a constant heat load. Refrigeration equipment is built to reject heat into the surrounding air, and when that air is already hot, the compressor has to run longer and harder to hold the same internal temperature. Over time, that extra run time adds up to real wear on the compressor and related components.
- Ambient heat near the unit raises head pressure and run time
- Longer run cycles mean more hours on the compressor over the unit's life
- Units placed on the cook line often run warmer internally than ones in cooler areas, even when they're working correctly
You usually can't move the line, but you can be aware that a unit in that spot will need more attention and shorter service intervals than one tucked away from heat sources.
Blocked Airflow Chokes the Unit From Both Sides
Undercounter refrigeration depends on airflow in two places: across the condenser coil to reject heat, and inside the cabinet to move cold air around stored product. Block either one and the unit struggles.
- Boxes, mats, or storage pushed against the front grille or side vents cut off the air the condenser needs
- Pans, sheet trays, or product packed against the evaporator fan inside the box stop cold air from circulating
- Units shoved flush against a wall or cabinetry with no clearance behind them trap heat right where it needs to escape
A unit that can't breathe runs longer to reach the same temperature, which again comes back to added wear on the compressor and fan motors.
Dirty Coils Make Everything Else Worse
In a kitchen, grease, flour dust, and general debris settle on condenser coils fast — faster under the counter than almost anywhere else in the building. A coil coated in buildup can't release heat efficiently, so the compressor runs longer to do the same job. That extra run time is one of the most common, and most preventable, causes of early compressor failure on this type of equipment.
- Coils should be checked and cleaned on a regular schedule, not just when the unit starts running warm
- Undercounter units in a cooking area typically need coil cleaning more often than other refrigeration in the building
- A unit that sounds like it's running constantly is often telling you the coil needs attention
Overloading Undoes Everything Else You Do Right
Even a clean, well-placed unit will struggle if it's packed past what it was built to hold. Overloading blocks internal airflow, forces the compressor to run longer, and can let warm spots develop inside the box even while the thermostat reads an acceptable temperature at the sensor.
- Leave space between pans and containers for air to circulate
- Avoid lining shelves with paper or mats that block airflow from underneath
- Give the unit time to recover temperature after a big load-in instead of immediately packing it full again
Simple Changes That Help Units Last Longer
None of this requires special tools or technical skill — it's mostly about awareness and routine.
- Keep clearance around the front grille and sides so air can move freely
- Clean coils on a regular schedule, more often near cooking equipment
- Avoid overpacking shelves and interior storage
- Give the unit some distance from fryers, ranges, and other heat sources when the kitchen layout allows it
- Watch for unusually long run times or warm spots and address them early rather than waiting for a failure
When to Call a Licensed Technician
Cleaning coils and keeping airflow clear are things any staff member can handle. Anything involving refrigerant, electrical components, or the compressor itself should always go to a licensed technician. Those systems are sealed and powered for a reason, and opening them up without the right training and equipment can turn a minor issue into an expensive one — or create a safety hazard. If a unit is running long, not holding temperature, or making unusual noise, that's the point to call for a proper diagnosis rather than guessing.
If your undercounter refrigeration is running hot, cycling constantly, or just isn't holding temperature the way it used to, give Commercial Service Company a call at 501-548-2374. We service restaurants, grocery stores, and commercial kitchens throughout Conway, Little Rock, Benton, Bryant, Maumelle, Jacksonville, Searcy, Russellville, and the rest of central Arkansas.