Call a refrigeration tech today if you see any of these: ice building on the evaporator coil, a box that will not hold setpoint, a compressor that never cycles off, water on the floor or in the drain pan, frost creeping back along the suction line, warm spots in a walk-in, a door gasket that no longer seals, grinding from the condensing unit, condenser fins packed with grease, or an electric bill that jumped with no change in hours.
Any one of these means the system is running outside its design. Under the FDA Food Code that Florida adopts by rule, cold time/temperature control for safety (TCS) food must be held at 41°F or below. Drift above that and you are out of compliance with inventory on a clock. Most of these are cheap in week one and expensive after the compressor eats itself.
The Temperatures You Are Actually Held To
Florida’s Division of Hotels and Restaurants adopts the 2017 FDA Food Code by reference in Rule 61C-1.001, Florida Administrative Code. The number that matters: cold TCS food must be held at 41°F (5°C) or below, and the danger zone runs from 41°F to 135°F. There is no single freezer setpoint in the rule, but stored frozen food has to stay frozen.
Florida inspects licensed food service establishments one to four times a year, unannounced, with frequency set by risk level. Temperature failures on TCS food are high priority violations, the category that can contribute directly to foodborne illness. Those bring immediate correction, a callback, and in bad cases an emergency closure with a 24-hour callback before you reopen.
Ten Warning Signs, In Order of Urgency
1. Ice buildup on the evaporator coil. Defrost is not clearing the coil. Usual causes: failed defrost timer or board, bad heater or termination thermostat, low charge, or a leaking door. Early, this is a part and an hour of labor. Late, the starved coil sends liquid back and you buy a compressor. Call today.
2. A box that cannot hold setpoint. Charge, a failing expansion valve, a stuck contactor, a dying evaporator fan, or a control out of calibration. Diagnosis plus one part is routine work. Ignored, it becomes a compliance problem the moment an inspector logs product above 41°F. Call today. Log product temps twice a shift meanwhile.
3. Longer run times, or a compressor that never cycles off. The system cannot reject heat: dirty condenser, failing condenser fan motor, low charge, or a compressor losing capacity. A coil cleaning and a fan motor are inexpensive. A compressor is one of the largest line items in the trade, and R-404A charge is not cheap. Within days.
4. Water on the floor or in the drain pan. A clogged or badly trapped condensate drain, a frozen line, or a rusted pan. Florida humidity means high condensate volume, so drains here load up fast. Clearing a line is a short call. Left alone: slip hazard, floor damage, mold, sanitation write-up. Within days.
5. Unusual noise from the condensing unit. Grinding and screeching point to failing fan or compressor bearings. Knocking on startup can be liquid slugging. A fan motor is a same-day part. A slugging compressor is a compressor. Call today.
6. Frost on the suction line. Frost creeping back toward the compressor means liquid refrigerant is returning where vapor should be. Causes: iced coil, dead evaporator fan, restricted metering device, overcharge. Compressors do not compress liquid. This turns a modest repair into a changeout. Call today.
7. Warm spots in the walk-in. Air is not circulating. Blocked coil, product stacked against the evaporator, a failed fan, or waterlogged panel insulation. Free to fix if it is stacking. Waterlogged panels mean box repair, which is not cheap. Within the week. Check product temps in the warm corner first.
8. Door gaskets that no longer seal. Torn or hardened gaskets let humid air in continuously. That air condenses on the coil, becomes ice, and drives every problem above. Test with a dollar bill: if it slides out of the closed door with no drag, the gasket is done. Cheapest part, best return. Within the week.
9. Condenser coils packed with grease and dust. A restaurant condensing unit pulls air carrying aerosolized cooking grease. Grease coats the fins, dust sticks to it, and the coil stops rejecting heat. Head pressure climbs, capacity drops. Cleaning is a line item on a maintenance visit. A year of loading kills compressor valves. This week.
10. Rising electric bills with no change in operations. Refrigeration running longer to do the same work. Every problem here shows up on the bill before it becomes a breakdown. Compare against the same month last year. Next scheduled visit, unless paired with anything else here.
Why Orlando Is Harder On Refrigeration
Orlando averages a 92°F daily high in July and roughly 25 days at or above 90°F that month alone, per 1991 to 2020 climate normals. Condensers reject heat into ambient air, so hotter ambient means higher head pressure and longer runtimes.
Then humidity. Every door opening pulls moist air into the box, and that moisture ends up as ice on the evaporator. Then grease-laden kitchen air, which fouls a condenser faster than clean outdoor air ever will. A maintenance interval that works in Ohio does not work here.
The Business Case, Honestly
Do this math with your own numbers. Add up what is in the walk-in right now at cost. Add the freezer. That is your exposure on one overnight failure.
Now the clock. FDA guidance for power loss: a refrigerator holds safe temperature about four hours with the door closed, a full freezer about 48 hours, a half-full freezer about 24. Perishable food at or above 40°F for more than two hours should be discarded. A compressor that quits at 11 p.m. Friday puts cooler product outside the safe window before the prep cook arrives.
Add what you cannot buy back: service you cannot run, an emergency call at overtime rates, a rented reefer trailer, and the chance an inspector finds it first. Against that, maintenance is a rounding error. It will not prevent every failure. It converts most catastrophic ones into scheduled ones.
What a Real Maintenance Program Includes
Quarterly, minimum, for Central Florida kitchens:
- Condenser coil cleaned, chemically if grease-loaded
- Evaporator coil inspected and cleaned
- Defrost cycle verified: timer or board, heaters, termination
- Superheat and subcooling checked against manufacturer targets
- Charge verified and leaks searched, not topped off blind
- Condensate drain cleared, trap and heat tape checked
- Gaskets, closers, hinges, strip curtains inspected
- Fan motors checked for bearing wear and amp draw
- Electrical connections torqued, contactors inspected
- Controls calibrated, product temperatures logged
Annually, add panel and insulation inspection, drain pan condition, amp draws trended against prior visits, and a written condition report per unit so you can budget replacements. If your provider leaves no written temperature and pressure record, you are paying for a coil rinse.
FAQ
What temperature does a walk-in cooler have to hold in Florida?
Cold time/temperature control for safety food must be held at 41°F or below under the 2017 FDA Food Code, which Florida adopts by reference in Rule 61C-1.001, Florida Administrative Code. Most operators set walk-in coolers a few degrees below 41°F so door traffic and defrost cycles never push product above the limit.
How often should commercial refrigeration be serviced in Orlando?
Quarterly is the working baseline for Central Florida restaurants. Ambient heat and humidity keep condensers under load most of the year, and grease-laden kitchen air fouls coils faster than in cooler, cleaner climates. High-volume kitchens with heavy fryer output usually need condenser cleaning more often than quarterly.
Why does my walk-in evaporator keep icing up?
Icing means defrost is not clearing the coil, or humid air is getting into the box. Check the defrost timer or control board, defrost heaters, termination thermostat, door gaskets, and door closers. Low refrigerant charge and a failed evaporator fan also cause icing and should be diagnosed by a technician.
Is frost on the suction line an emergency?
Yes. Frost traveling back along the suction line toward the compressor means liquid refrigerant is returning instead of vapor. Compressors are built to compress vapor, and continued operation can destroy one. Move product if you can, shut the system down, and get a technician out the same day.
What does the refrigerant phasedown mean for my equipment?
The AIM Act cuts HFC production and import to 15% of baseline by 2036, with allowances at 60% of baseline through 2028. EPA also set global warming potential limits for new retail food refrigeration: an interim 1,400 limit for supermarket systems from January 1, 2027, dropping to 150 or 300 by 2032.
Should I repair or replace an aging walk-in system?
Compare the repair against remaining useful life, current runtime, and refrigerant type. A system with a failed compressor, a fouled condenser, an R-404A charge, and years of deferred maintenance is usually a replacement candidate. A newer unit with one failed component is a repair. Ask for a written condition report first.
Talk to a Commercial Refrigeration Tech in Central Florida
Airborne Tech Service is a family owned company providing commercial refrigeration and commercial HVAC service across Central Florida: Orlando, Winter Park, Maitland, Altamonte Springs, Casselberry, Winter Springs, Longwood, Oviedo, Lake Mary, Sanford, Apopka, Kissimmee, and Deltona. Florida license CAC1822084, Certified Air Conditioning Contractor, statewide.
We offer 24/7 emergency service. If your walk-in is drifting, icing, or making a noise it did not make last week, call (321) 240-9346.