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Polar Express HVAC & Refrigeration

Commercial Refrigeration

Walk-in freezer repair, including the defrost fault behind it.

Polar Express repairs business walk-in freezers 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 defrost controls, iced coils, frozen drains, compressors, and door heaters. TDLR license TACLA00127982C.

Most warm freezers are not dead compressors. They are defrost failures, iced coils, and frozen drains, and every one of those is cheaper if you call early.

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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 freezer failure moves faster and costs more than a cooler failure. Product that thaws does not come back, and the Texas food establishment rules that expect frozen food to be held at 0 F leave no room to run a box warm for a few days while you shop for parts. Most of the walk-in freezer calls we take in San Antonio are not dead compressors at all. They are defrost faults: a heater that stopped heating, a termination sensor lying to the controller, a drain line that froze solid and pushed water back under the coil. Polar Express works on every brand of freezer box and low-temperature condensing unit, day or night, at a flat rate quoted before the repair begins.

What we handle

Walk-In Freezer 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.

  • Defrost system failures

    Heaters, timers, termination sensors, and the control logic that decides when a coil gets cleared. This is the single most common fault we find on a warm freezer.

  • Iced coils and frozen drains

    Coils packed solid, drain lines frozen closed, and heat tape that stopped doing its job. We clear the ice and then fix the reason it formed.

  • Refrigerant leaks and low charge

    A low-temperature system is far less forgiving of a small leak than a cooler is. We locate it, repair it, and charge the system to spec.

  • Compressors and condensing units

    Failed compressors, contactors, capacitors, and head pressure controls on low-temp units, including remote and rooftop installations.

  • Doors, sweep heaters, and gaskets

    Frozen-shut doors, failed heater wire in the frame, torn gaskets, and hinges that no longer pull the door closed against its seal.

  • Controls and temperature alarms

    Controllers, alarm contacts, and monitoring that tells you a box is drifting while there is still time to do something about it.

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.

  • Frost building on the ceiling, walls, or cartons

    Heavy frost inside a freezer is moisture getting in and never getting back out. A failing gasket, a door propped open on a hot delivery, or a defrost cycle that no longer terminates properly all show up as frost long before they show up on the thermometer.

  • The evaporator coil is a solid block of ice

    An iced-over coil has stopped moving air, so the box warms even while the compressor runs hard. The real cause is upstream: a dead defrost heater, a stuck timer, a failed termination thermostat, or a drain that backed up and refroze.

  • It holds during the day and drifts overnight

    A box that only fails on one part of the cycle is usually a defrost or control problem rather than a mechanical one, and it is the easiest fault in this trade to catch if somebody is logging temperatures. A box that only struggles during service is often a door-traffic or ambient-heat problem instead.

  • Ice cream is soft but the wall thermometer reads fine

    Air temperature at the sensor and product temperature in the middle of a stack are two different numbers. Soft product with a good wall reading usually means poor circulation inside the box, a sensor in the wrong spot, or short cycling that never lets the load come all the way down.

  • The unit is suddenly much louder

    A change in noise on a low-temperature system is worth a call. Failing fan bearings, a compressor working against high head pressure, and loose panel hardware all make new sounds, and two of those three get expensive when they are left alone.

What it costs

You approve the price before the work starts.

Freezer repair pricing follows the same rule as everything else we do: nothing gets charged until you have seen the number and said yes. We will not quote a low-temperature repair over the phone, because the honest answer to what is wrong with a freezer requires putting gauges on it and watching a cycle. What you will get is a diagnosis in plain language, one flat rate for the fix, and a clear explanation of what happens to the equipment if you defer it.

Request a quote

What moves the number

  • Whether the fault is in the defrost circuit, the refrigeration circuit, or the box itself
  • How much refrigerant was lost, and whether the leak is accessible or buried in the panel
  • Low-temperature parts, which are not always the parts a medium-temp cooler uses
  • Whether the coil has to be thawed before a technician can even see what failed
  • A scheduled visit versus after-hours emergency dispatch
  • The overall condition of the condensing unit, and whether the repair is worth doing at all

How the job runs

What happens between your call and a working system.

  1. Step 1

    Stabilize the product first

    Before anything mechanical, we talk about what is inside. Consolidating product, keeping the door shut, and moving the highest-value items are decisions worth making in the first hour rather than the fourth.

  2. Step 2

    Thaw and inspect the coil

    You cannot diagnose a coil you cannot see. When the evaporator is iced solid, clearing it is step one, and it frequently exposes the failed heater or sensor that caused the ice in the first place.

  3. Step 3

    Test the defrost cycle end to end

    Initiation, heater amp draw, termination, drain flow, and fan delay. Replacing a heater without confirming the control that runs it is how a freezer comes back three weeks later with exactly the same complaint.

  4. Step 4

    Watch it hold through a full cycle

    The box has to prove it, not just start. We confirm it pulls down, terminates defrost cleanly, and drains, and we leave your team with the readings to expect tomorrow morning.

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

Ice in a walk-in freezer is a moisture problem and a defrost problem, usually at the same time. Warm humid air gets in through a failing gasket, a propped door, or a dead sweep heater, and then the defrost cycle fails to clear what condenses on the coil. Fixing the ice without fixing the way air gets in buys you a few weeks and nothing more.

Frozen food is expected to stay frozen under the Texas food establishment rules, and 0 F is the mark most operators set a walk-in freezer at or slightly below so there is room for door traffic and defrost cycles. A box that cannot get under 10 F is not marginal, it is failing. Product quality tends to go before the temperature log does, so soft product is worth a call on its own.

Longer than most people expect if the door stays shut, and far shorter than anyone hopes once it starts opening. A full, tightly packed freezer holds cold much better than a half-empty one, which is why consolidating product into a single box is the first move. Do not refreeze anything that fully thawed, and check with your local health authority before deciding what can be kept.

No, and assuming it is costs money. Defrost failures, iced coils, blocked condensers, failed fan motors, and control faults all present as a warm box, and every one of them is cheaper than a compressor. A technician tells them apart by measuring pressures and amp draw, which takes one visit and is the difference between a part and a project.

Usually, yes. Most freezer repairs happen at the condensing unit and the evaporator rather than in your work aisles, and non-emergency visits get scheduled before open or after close whenever the fault allows it. When a repair genuinely needs the box emptied, we say so up front so you can plan the shift around it instead of finding out mid-service.

Polar Express provides one written flat-rate price for walk-in freezer repair in San Antonio, approved before work begins. The total depends on whether the fault is in the defrost or refrigeration circuit, how much thawing is needed for diagnosis, and the failed low-temperature component or refrigerant work. The quote does not grow with an hourly meter.

Polar Express offers same-day service on most walk-in freezer repair calls across San Antonio and 24/7 emergency dispatch every day, including nights, weekends, and holidays. The person answering the phone provides a real arrival window after assessing box temperature, product condition, ice buildup, and whether the compressor or fans are operating.

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