Choose the symptom above and this fills in with the likely cause, what we test first, and how long the visit usually runs.
A reach-in that runs continuously and still will not pull down has usually lost heat-rejection capacity rather than refrigerant. In a Tampa kitchen the first suspect is a condenser packed with grease, flour and lint, then the condenser fan motor, then door gaskets letting warm kitchen air in faster than the system can remove it. Low charge does happen — but low charge means a leak, not a top-off, and it has to be proven with gauges and a leak search before anyone opens the sealed system.
What we test firstCondenser condition and fan current first, then discharge and suction pressures with superheat and subcooling, then a gasket and door-closure check with the cabinet under its normal load.
Parts usually on the truckCondenser and evaporator fan motors, start components, common gasket profiles
Typical visit60–90 minutes for the common causes
The controller reports what one thermistor sees at one point in the cabinet. A drifting probe, a probe that has slipped out of its clip, or a corroded connector will produce a reading that is completely convincing and completely wrong. We never accept the front panel as evidence — we compare it against calibrated readings taken in the cabinet and inside the product itself, because food safety is judged on product temperature, not display temperature.
What we test firstCalibrated cabinet and product-zone readings against the display, probe resistance checked cold and warm, connector and harness inspection at the controller.
Parts usually on the truckThermistors and controllers for common M3 and Super Deluxe platforms
Typical visit45–75 minutes
Frost that keeps returning means the defrost sequence is not finishing its job, or moisture keeps entering the cabinet. On a timed-defrost cabinet the fault is usually the heater, the termination sensor, the timing, or the fan-delay after defrost. On any cabinet, a torn gasket or a door held open through a delivery will out-ice a perfectly healthy defrost system.
What we test firstDefrost heater continuity and current draw, termination sensor behaviour, timing and fan delay through a full cycle, then gasket compression and door-closure.
Parts usually on the truckDefrost heaters, termination sensors, timers and gaskets for common sizes
Typical visit60–120 minutes, longer if the coil has to be cleared first
A rattle that appears on start and settles is usually mechanical: a fan blade catching ice or a shroud, a loose panel, or worn compressor mounts. A hard buzz that ends in a click and silence is a different story — that is often a start component or an overload cutting out, and it is a much smaller job than the compressor replacement it gets mistaken for.
What we test firstLocate the noise with the panels off, check fan blade clearance and bearings, then measure start-winding and run-capacitor values before anyone condemns a compressor.
Parts usually on the truckStart relays, run capacitors, fan blades and motor mounts
Typical visit45–90 minutes
Meltwater has to leave the cabinet on every defrost. When the drain trough, the drain line or the evaporator pan is blocked with debris or frozen shut, that water backs up into the box, refreezes and eventually ices the coil as well. It is a small repair that turns into an expensive one if it is left to run for a season.
What we test firstDrain trough and line cleared and flow-tested, drain heater checked on freezer models, evaporator pan and cabinet level verified.
Parts usually on the truckDrain line components and drain heaters for common platforms
Typical visit45–75 minutes
This is the single most common Turbo Air prep-table call, and it is almost never the compressor. Cold air reaches the rail through a specific path; block that path and the rail warms while the base stays cold. Overfilled pans, wrong pan sizes, pans lifted out of the well, ice in the duct, a weak evaporator fan, or a lid left open through service will all do it. The right fix depends on which one it actually is — and sometimes the honest answer is that the machine is fine and the workflow is not.
What we test firstAir delivery measured at each rail zone, pan fitment and fill line checked, evaporator fan current and blade condition, duct clear of ice, lid and gasket condition.
Parts usually on the truckEvaporator fans, lid gaskets and rail hardware for common widths
Typical visit60–90 minutes
A cabinet running colder than its setpoint points at the control side rather than the cooling side. A drifting thermistor, a controller stuck in a call for cooling, a probe reading a false warm value, or a differential set too tight will all overshoot. On a prep table it also matters where the probe sits relative to the airflow — a probe in the wrong stream will chase a temperature the food never sees.
What we test firstSetpoint and differential read back from the controller, probe resistance verified against a calibrated reference, probe location and airflow relationship confirmed.
Parts usually on the truckThermistors and replacement controllers
Typical visit45–75 minutes
Condensation is a humidity and surface-temperature problem, and Tampa supplies the humidity for free. Worn lid gaskets, a lid that no longer sits square, a cabinet running colder than it needs to, or a dish machine venting straight at the unit will all put moisture on cold steel. Sweat is worth solving because the water ends up in the cabinet and eventually in the insulation.
What we test firstLid seat and gasket compression, cabinet setpoint reviewed against actual product temperature, ambient humidity and nearby equipment exhaust considered.
Parts usually on the truckLid gaskets and hinge hardware for common models
Typical visit45–60 minutes
This is the clearest sign a unit has quietly lost its capacity margin. Closed and empty overnight, a marginal machine looks perfect. Add a full rail, a hot kitchen, and a lid opening several hundred times through a lunch, and the same machine falls behind and never catches up. The underlying cause is usually a partly blocked condenser, a tired fan, or heat radiating in from a grill or fryer alongside it.
What we test firstReal-world recovery test with the rail loaded and the lid cycled, condenser and airflow inspection, ambient heat survey around the installation.
Parts usually on the truckCondenser fans, cleaning equipment, gaskets
Typical visit60–120 minutes including the loaded recovery test
Prep tables carry a drain path from the rail well and from the evaporator. When either blocks, the water has nowhere to go but into the cabinet. Debris from prep, a kinked drain line, or a line that was never trapped correctly at installation are the usual findings.
What we test firstRail well and evaporator drain traced end to end and flow-tested, trap and slope checked against installation requirements.
Parts usually on the truckDrain line and trap components
Typical visit45–75 minutes
Undercounter and worktop cabinets are asked to reject heat into the hottest few square feet of the kitchen. Nine times out of ten the first finding is the front intake grille blocked by a bus tub, a mat, or a stack of sheet pans, followed by a condenser that has not been cleaned since installation. The machine is often healthy — its air supply is not.
What we test firstIntake and discharge clearance measured, condenser and fan condition, ambient temperature at the intake logged, then system pressures if the airflow checks out.
Parts usually on the truckCondenser fans, cleaning equipment, gaskets
Typical visit45–90 minutes
Short-cycling burns a compressor out faster than almost anything else. The causes divide into control faults — a tight differential, a probe in the wrong place, a failing controller — and system faults such as a restricted condenser or a low charge tripping the overload. Telling those two families apart before the compressor pays the price is the whole job.
What we test firstCycle timing logged, controller differential and probe position checked, then amp draw and pressures across a full cycle.
Parts usually on the truckControllers, thermistors, start components and overloads
Typical visit60–90 minutes
Undercounter doors and drawers take physical abuse all shift. Compressed or torn gaskets, sagging hinges, a cam-lift that no longer lifts, or a cabinet racked slightly out of square all break the seal. A door that does not close on its own is a refrigeration fault waiting to be written up on an inspection.
What we test firstGasket compression tested along the full perimeter, hinge and cam-lift function, cabinet square and levelling checked.
Parts usually on the truckGaskets, hinges and cam-lift hardware for common models
Typical visit45–75 minutes
A cabinet that trips protection is telling you something specific. Moisture in a defrost or drain heater, a fan motor breaking down to ground, a chafed harness, or a compressor drawing locked-rotor current will all trip. This is one of the few faults where continuing to reset the breaker is genuinely the wrong move.
What we test firstInsulation resistance to ground on each load, component-by-component isolation, harness inspection at every pass-through.
Parts usually on the truckFan motors, heaters, harness repair materials
Typical visit60–120 minutes
Merchandiser glass stays clear because a controlled amount of heat is applied to it. When the anti-sweat heater circuit, its controller, or the door gasket fails, Florida humidity puts water straight on the glass. On freezer merchandisers the same fault shows as frost the customer cannot see through — which costs sales long before it costs product.
What we test firstAnti-sweat circuit current and controller output, door gasket and hinge alignment, ambient humidity at the case.
Parts usually on the truckDoor heaters, gaskets and heater controllers
Typical visit60–90 minutes
A vertical temperature spread almost always means air is not being delivered the full height of the case. Overloaded shelves past the load line, blocked return air at the bottom, a weak evaporator fan, or partial ice on the coil will all stratify the cabinet. Product on the top shelf pays for it first.
What we test firstAir delivery measured at top, middle and bottom, load line and return path checked, evaporator fan current and coil condition.
Parts usually on the truckEvaporator fans and shelf hardware
Typical visit45–90 minutes
Lighting is not refrigeration, but on a merchandiser it is revenue. Failures are usually the driver rather than the strip, and a flickering strip often means a driver on its way out or moisture reaching a connector. Worth fixing on the same visit rather than a second trip.
What we test firstDriver output measured, strip continuity, connector and moisture inspection.
Parts usually on the truckCommon LED drivers and strips
Typical visit30–60 minutes when combined with another repair
An open grab-and-go case has no door — the air curtain is the door. Anything that disturbs that curtain wrecks the case: product past the load line, a blocked return grille, a store door or ceiling diffuser blowing across the opening, or a dirty coil. In our experience the fix is as often a merchandising change as a part.
What we test firstCurtain integrity checked with smoke and temperature readings across the opening, load line, return grille, coil and ambient air movement around the case.
Parts usually on the truckEvaporator fans, grille hardware, cleaning equipment
Typical visit60–120 minutes
Back bars live in the worst spot in the building: enclosed under a bar top, with limited air, warm bodies on the other side of the counter and doors opening constantly. The most common finding is a condenser choked with dust and a rear or base clearance that was never there to begin with. Add a busy Friday and the cabinet simply cannot catch up.
What we test firstCondenser and fan condition, clearance measured at every ventilated face, ambient at the intake, then pressures if the air side checks out.
Parts usually on the truckCondenser fans, cleaning equipment, gaskets
Typical visit45–90 minutes
Sliding glass and solid doors on back bars wear at the track and the roller. Once a door no longer sits square, it stops sealing and the cabinet runs constantly to make up for the leak. This is a hardware repair with a refrigeration symptom, and it is frequently misdiagnosed as a cooling fault.
What we test firstTrack, roller and door alignment, seal contact along the full closing edge, cabinet level.
Parts usually on the truckTrack and roller hardware, gaskets
Typical visit45–75 minutes
Under a bar, a blocked drain or an overflowing condensate pan puts water on a floor people walk on all night. The cause is usually a blocked drain line, a failed evaporation pan heater on models that use one, or a cabinet that is out of level in a direction that fights the drain.
What we test firstDrain path traced and flow-tested, condensate pan and any pan heater checked, cabinet level verified against the drain direction.
Parts usually on the truckDrain components and pan heaters
Typical visit45–75 minutes
Same story as the prep table: the cabinet has lost its margin. It looks healthy at 2 PM on a Tuesday and falls behind on a Saturday because it no longer has the reserve to absorb a few hundred door openings and a fresh load of warm bottles.
What we test firstRecovery test with the cabinet loaded and doors cycled, condenser and airflow inspection, ambient survey behind the bar.
Parts usually on the truckCondenser fans, gaskets, cleaning equipment
Typical visit60–120 minutes with the recovery test
Freezers work with a much smaller margin than coolers, so the same dirty condenser that makes a cooler run a little longer will stop a freezer from reaching setpoint at all. Beyond the condenser, the usual causes are a coil iced over from a defrost fault, an evaporator fan that has failed or is running slow, or a genuine refrigerant loss — which we prove before we open anything.
What we test firstCondenser and fan condition, coil frost pattern, evaporator fan current, then a full pressure and superheat evaluation.
Parts usually on the truckFan motors, defrost components, start components
Typical visit60–120 minutes
A blanketed coil cannot move heat, so the cabinet warms while the machine works harder than ever. The reason the frost stopped clearing is what matters: heater failure, a termination sensor that ends defrost too early, a timer or controller fault, or moisture entering through a bad gasket or a door left open.
What we test firstDefrost heater current, termination sensor behaviour through a live cycle, timing and fan delay, gasket and door closure.
Parts usually on the truckDefrost heaters, termination sensors, timers, gaskets
Typical visit60–120 minutes plus coil clearing
Freezer doors and frames use heaters to stop exactly this. When a frame or mullion heater fails, the door freezes to the cabinet and staff pull harder until the gasket tears — which lets in more moisture and accelerates the whole problem. Catch it early and it is a heater; catch it late and it is a heater, a gasket and a hinge.
What we test firstFrame and mullion heater circuits measured, gasket condition, hinge and closure alignment.
Parts usually on the truckFrame heaters, gaskets, hinge hardware
Typical visit60–90 minutes
A defrost cycle that runs and leaves ice behind is usually too short, terminating early, or fighting a heater that has partly failed. On some cabinets it is the fan-delay after defrost that is at fault: the fan restarts before the coil is dry and blows the meltwater straight back onto the fins where it refreezes.
What we test firstFull defrost cycle observed end to end with heater current, termination point and fan-delay timing recorded.
Parts usually on the truckHeaters, sensors, timers and control boards
Typical visit90–150 minutes, since the cycle has to be watched
At this age the unit is likely still inside Turbo Air's published parts-and-labour window, which has historically run three years from installation on most current commercial series, with additional compressor coverage beyond that. Coverage varies by series and by build year, so the serial number is the only authority — we will tell you plainly if the failed part looks like a warranty claim rather than a bill, and what documentation the claim needs.
This is the age where a cabinet is usually well worth repairing and where the compressor may still carry extended coverage even after parts-and-labour has expired. Fan motors, controllers, probes, heaters, gaskets and drains are all routine repairs at this age, and the cabinet itself has years of service left if the doors and insulation are sound.
Age alone does not condemn a Turbo Air. What matters is the condition of the cabinet, doors and insulation, the cost of the specific repair, the parts lead time for a discontinued platform, and what a comparable replacement costs today with installation. We will give you the numbers on both sides — including how long the parts will take to land — and we will say so if replacement is genuinely the better call.