Commercial Refrigeration Maintenance Schedule

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Many refrigeration breakdowns start as something small that nobody was assigned to watch: a condenser coil slowly packing with kitchen grease, a torn gasket, a drain line starting to freeze. A written schedule fixes that. This page gives you a daily, weekly, monthly, quarterly and yearly plan for walk-ins, reach-ins, prep tables, display cases and ice machines, splits the work between your staff and a technician, and uses the intervals the equipment makers publish, not guesses.

It is part of our Commercial Refrigeration Help Center. Print the table, put a name next to each line, and keep the log where an inspector can see it.

Why the schedule matters

California's food code (HSC 114175) requires that "Equipment and utensils shall be kept clean, fully operative, and in good repair," and it sets cold holding at 41°F or below for potentially hazardous food (HSC 113996). Beyond the code, manufacturers are blunt about neglect. Manitowoc says "A dirty condenser restricts airflow, resulting in excessively high operating temperatures. This reduces ice production and shortens component life" (Manitowoc manual). True says "Routine care and maintenance procedures are not covered by TRUE's warranty" (True manual). In other words, a failure caused by a dirty coil can land on you, not the manufacturer.

Our refrigeration technicians recommend giving every unit an owner: one named person who reads its thermometer and looks it over each shift.

The schedule at a glance

Kitchens with fryers, flour or heavy traffic need the short end of every range. The sections below give the sources.

Every shift and every day: staff tasks

Temperatures and thermometers

CalCode requires "a thermometer ... for each refrigeration unit," located "to indicate the air temperature in the warmest part of the unit," readable in increments no greater than 2°F (HSC 114157). Put it near the door, not beside the evaporator. A temperature log with times and initials is the single most useful record you can keep: it shows an inspector your controls work, and it shows a technician when a problem started. Our health inspection refrigeration checklist covers what inspectors look for.

Doors, curtains and airflow

• Norlake advises "Avoid leaving entry doors open for more than five minutes," because warm moist air forms a film of ice or moisture on floors, ceilings and walls, and says vinyl strip curtains reduce it (Norlake manual).
• Keep product off the evaporator fan guard and away from the air return. Blocked airflow is a common cause of a warm box.
• Keep boxes, mops and aprons off condenser grilles on reach-ins and prep tables.
• Frost or condensation around a walk-in door jamb or heated vent "indicates that the electric heater is inoperable, or excessive moisture is present," according to Kolpak (Kolpak manual). Report it to your technician; it will not fix itself.

Weekly and monthly: gaskets, drains and coils

Kolpak says "All metal surfaces, magnetic door gaskets and door sweep gaskets should be cleaned frequently with a mild detergent," and to ensure the gasket "seals around the entire door perimeter" (Kolpak manual). A quick test: close the door on a sheet of paper. If it slides out easily, that section is not sealing. True's schedule also calls for checking "physical condition of all gaskets; verify gaskets seal correctly" (True manual).

For self-contained units, True's maintenance table lists this under monthly, quarterly and annual checks: "Check all condenser coils (fronts and backs) for dust and debris; if present, clear the debris." Its tip for checking: "use a flashlight to verify that you can see through the coil and observe the condenser fan blade spinning" (True manual). Turbo Air says for its M3 reach-ins, "Condenser coil should be cleaned at least every three months (90 days) or as needed," and to unplug the unit first (Turbo Air manual).

Quarterly and twice a year: technician service

Norlake recommends walk-in preventive maintenance "on a quarterly schedule by a certified technician," including checking door gaskets for tears, adjusting the door sweep, inspecting heated vent ports, and cleaning and inspecting evaporator and condenser coils (Norlake manual). For condensing units, Heatcraft calls for a quarterly check of the condenser for dirt and debris and a semi-annual cleaning of the "condenser coil and blades," adding that a foam cleaner "should not be an acid based cleaner" (Heatcraft manual).

On a typical visit our technician also checks:

• Defrost: that the coil clears fully. Turbo Air notes that "two to four defrost cycles per day should be adequate" for most applications, and that ice left after a partial defrost "will re-freeze into ice during the next cycle" (Turbo Air manual).
• Drains: that condensate drain lines and drain line heaters work, so water does not back up or freeze in the pan.
• Electrical: contactors, capacitors, fan motors and connections for heat damage or wear.
• Refrigerant: signs of oil at fittings, pressures and temperatures in range, and a leak check. Systems with 15 lb or more of HFC fall under the federal leak repair rule; see refrigerant rules for businesses.
• Controls and alarms: set points, thermostat or controller calibration, and that temperature alarms still reach someone.

This is the work our commercial refrigeration maintenance service does on a schedule, and Lotus Thai in San Jose is one of the restaurants we look after with preventive maintenance and emergency repair. For more on the payoff, read how preventive maintenance saves on refrigeration repairs.

Ice machines: follow the manufacturer's interval

Ice is food under CalCode, and ice makers must be cleaned "at a frequency specified by the manufacturer, or, absent manufacturer specifications, at a frequency necessary to preclude accumulation of soil or mold" (HSC 114117). What the makers say:

Manitowoc adds that if a machine needs more frequent descaling, you should have a qualified service company test the water. Scotsman recommends a refrigeration technician for condenser cleaning. For symptoms between cleanings, see ice machine problems, and for repairs, our ice machine repair service.

Keep the paperwork

• Temperature logs for every unit, every shift.
• Cleaning records for ice machines, with dates and who did it.
• Service reports from every technician visit. If any single system at your site holds over 50 lb of high-GWP refrigerant, CARB requires service records on site "for at least 5 years for each refrigeration unit" (CARB).
• Nameplate photos showing model, serial number and refrigerant type, so a technician can bring the right parts.

Good logs also tell you when a unit is costing more to keep than to replace. When that day comes, read repair or replace commercial refrigeration.

Set up a maintenance plan

Frequently asked questions

Written and reviewed by Jim McKinny, owner of Cool Aid Air Conditioning & Refrigeration — California C-20 and C-38 licensed, EPA Universal certified, second generation of a family business serving the Bay Area since 1966. Every job we complete is backed by our 1-year parts & labor warranty.