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Polar Express HVAC & Refrigeration

Commercial Refrigeration

Walk-in cooler repair before the product turns.

Polar Express repairs business walk-in coolers across the San Antonio metro, with 24/7 emergency dispatch and same-day service on most repair calls. One flat-rate price is approved in writing before work begins for temperature, airflow, refrigerant, control, defrost, and door-seal work. TDLR license TACLA00127982C.

A cooler that is drifting is on a clock you did not set. We diagnose the whole box, quote one flat rate, and stay until it is pulling down again.

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  • Licensed TACLA00127982C
  • Since 2023
  • 4.9 Google rating

24/7 emergency dispatch

Call now. A person answers.

Any hour, any day of the year, including holidays. Tell us what the equipment is reading and we will tell you what to do with the product while a technician is on the way.

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Flat-rate price approved before any work starts, on emergency calls the same as on scheduled ones.

A walk-in cooler is the most expensive box in the building and the one nobody looks at until the air inside it goes soft. By the time a cook notices the milk is warm, the box has usually been climbing for hours, and the clock that matters is not the repair clock. It is the one the Texas food establishment rules put on cold holding at 41 F or below. Polar Express services commercial walk-in coolers across San Antonio on any brand of box and any brand of condensing unit, with the same 24/7 line the rest of the company runs on and a flat-rate price you approve before a wrench moves. We have been doing this work locally since 2023 under TDLR license TACLA00127982C.

What we handle

Walk-In Cooler Repair covers more than one failure.

The complaint that gets called in is rarely the whole job. These are the things a technician is actually looking at on this equipment.

  • Temperature that will not hold

    Boxes running warm, boxes running wet, and boxes that hold overnight then climb the moment the kitchen starts opening the door.

  • Evaporator and condenser faults

    Failed fan motors, blocked coils, iced evaporators, and the airflow problems that look exactly like a refrigerant problem until somebody measures.

  • Refrigerant leaks and charge

    Leak location, proper recovery, repair, and a correct charge, rather than a top-off that puts you back on the phone next month.

  • Controls, thermostats, and defrost

    Temperature controllers, defrost timers, contactors, relays, and the wiring faults that make a healthy compressor look dead.

  • Doors, gaskets, and hardware

    Torn gaskets, dragging doors, failed closers, and worn hinges. The cheapest repair on this list and the one that quietly runs your power bill up.

  • Compressors and condensing units

    Diagnosis, component replacement, and honest repair-or-replace math on a condensing unit that has started stacking failures.

Signs and causes

What you are seeing, and what usually causes it.

Read these before you call. Knowing which one matches gets the right parts on the truck, and a couple of them are worth acting on in the next ten minutes.

  • Product is cold, but not cold enough

    A box sitting in the mid 40s usually points at airflow or charge rather than a dead compressor. Dirty condenser coils, a failed evaporator fan, or a slow refrigerant leak all present this way first, and all three get worse under a San Antonio summer load.

  • Ice on the evaporator coil

    A coil buried in frost is a defrost problem or a moisture problem. Failed defrost heaters, a stuck timer, a bad termination sensor, or a door that no longer seals will pack a coil with ice until air stops moving through it entirely.

  • Water on the floor inside the box

    Blocked or frozen condensate drain lines back up into the box. It is a slip hazard, it is an inspection finding, and it is usually a twenty-minute problem that turns into a shutdown when it gets ignored for a month.

  • The unit runs constantly and never cycles off

    A condensing unit that never satisfies is fighting something: a fouled condenser, a low charge, a contactor welded closed, or a box being loaded with warm product faster than the system can pull it down.

  • The compressor short cycles or trips a breaker

    Short cycling is an electrical or pressure fault, not a temperature setting. Stop resetting the breaker and call, because every restart on a struggling compressor takes something off the end of its life.

What it costs

You approve the price before the work starts.

There is no honest way to publish a walk-in cooler repair price on a web page, because the same complaint can be a twelve dollar relay or a compressor changeout. What we can promise is the order of operations. A technician diagnoses the box on site, tells you in plain language what failed and why, and quotes one flat rate for the repair. You approve that number before any work starts, and it does not move because the job ran longer than expected.

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What moves the number

  • Which component failed, and whether the part is on the truck or has to be sourced
  • Refrigerant type and how much the system lost, since leak repair and recharge are separate work
  • Whether the fault sits in the box, in the condensing unit, or in the controls between them
  • Access, because a rooftop or remote condensing unit is a different job from a self-contained top-mount
  • Time of day, since after-hours emergency dispatch is not priced like a scheduled visit
  • Whether the equipment is already covered by a maintenance agreement with us

How the job runs

What happens between your call and a working system.

  1. Step 1

    Triage on the phone

    The first questions are what the box is reading and how long it has been there, because a cooler at 45 F with product in it is a different dispatch from a cooler that has been off since last night. You get the steps that protect inventory while the technician is still driving.

  2. Step 2

    Diagnose the whole loop

    Temperatures, pressures, superheat, amp draw, airflow, and door seal. A walk-in is a system, and the number of coolers we have seen running fine on a new compressor and still warm because of a torn gasket is not small.

  3. Step 3

    Flat-rate quote, then repair

    One price for the fix, approved before the work begins. Common motors, contactors, and controls travel with the technician, so a large share of these calls close on the first visit.

  4. Step 4

    Pull-down verified before we leave

    We do not call it fixed at the moment the compressor starts. We stay until the box is pulling down and the controls are cycling the way they should, then tell you what the readings ought to look like tomorrow.

Questions

Straight answers, before you call.

Still not covered here? The person who answers the phone can usually settle it in a sentence, day or night.

Call (210) 376-0781

A walk-in that stops cooling almost always comes down to one of four things: a blocked or filthy condenser coil, a refrigerant leak, a failed evaporator or condenser fan motor, or an electrical fault in the controls. A technician can separate them in a single visit by reading pressures and amp draw. Guessing between them is how a small repair turns into a compressor replacement, which is why the measurement comes before the parts conversation.

Most operators set a walk-in cooler between 35 F and 38 F so that product stays at or below the 41 F cold-holding limit in the Texas food establishment rules. Air temperature and product temperature are not the same reading, which is how the thermometer on the wall can look perfectly fine while the food does not. Keep a probe in a container of product, not just in the air, and log it.

It depends on the temperature and how fast it is moving. If the box is still at or below 41 F, keep the door shut, stop restocking it, and pull the most temperature-sensitive product first. Once it is above that line the safe answer is to relocate product to a working box or to ice, and to check with your local health authority before serving anything that spent an extended stretch above temperature.

Repair usually wins until the unit starts stacking failures. A compressor changeout on top of a recent fan motor and a recent control replacement is the point where the math turns, and pretending otherwise just sells you a second repair. We lay out the honest comparison, including what a replacement would cost installed and what your current refrigerant means for parts availability, and we do not push the bigger invoice.

Three things. Confirm the unit has power and the breaker has not tripped, look at the condenser coil for dust, grease, or cardboard blocking the airflow, and check that the door is closing and sealing against its gasket. Do not add refrigerant, do not chip ice off a coil with anything metal, and do not keep resetting a breaker that keeps tripping, because that fault is electrical and it is getting worse.

Polar Express provides one written flat-rate price for walk-in cooler repair in San Antonio, approved before work begins. The total depends on the failed component, refrigerant leak and recharge needs, and whether the condensing unit is rooftop, remote, or mounted on the box. The repair does not run on an hourly meter.

Polar Express offers same-day service on most walk-in cooler repair calls across San Antonio, with 24/7 emergency dispatch on nights, weekends, and holidays. The person answering the phone provides a real arrival window after asking what the box reads, how quickly it is changing, and what inventory is at risk.

Related services

The work that usually comes with this one.

Nearby

We run this service across the San Antonio metro. These are three of the areas we cover, and the full list lives on the service areas page.

One call, day or night.

Licensed, locally owned, and answering the phone around the clock. You get the diagnosis in plain language and the price before the work starts.

Call 24/7 · (210) 376-0781Book Service