A walk-in freezer full of proteins, ice cream or prepped product can represent thousands of dollars of inventory. When it starts icing up or warming, we diagnose the defrost system, the drain, the doors and the refrigeration side together, for restaurants, grocery and convenience stores, schools and food distributors in Boise, Meridian, Eagle, Nampa, Caldwell and Kuna. We answer 24/7.
Most freezer failures start as ice in the wrong place. Finding out why it is there is the repair.
If defrost never starts, frost builds on the coil every cycle until the box warms up. If defrost never ends, the box warms during every cycle. We test the timer or control, the schedule and the termination setting.
Electric heaters on the evaporator coil melt frost during defrost. When one fails, part of the coil stays iced and airflow drops. We check each heater's draw rather than guessing.
A coil encased in ice moves almost no air. Besides defrost faults, we look for failed evaporator fan motors, low refrigerant charge and air leaks at the door.
Defrost water has to drain through a below-zero box. A failed drain line heater lets that water refreeze, back up into the pan, and drip ice onto the floor and product.
Doors that freeze to the frame, tear gaskets or will not close tight. A failed perimeter heater or worn gasket lets humid kitchen air in, which ends up as ice on the coil.
Compressor, fan, contactor and pressure control failures, plus refrigerant leaks. Low-temperature systems are less forgiving of a marginal charge than coolers are.
A freezer evaporator runs well below the box temperature, so every bit of moisture that enters the box ends up as frost on the coil. Several times a day, a defrost timer or electronic control shuts off the refrigeration, energizes heaters on the coil, and melts that frost. A termination sensor ends defrost once the coil is clear, the fans wait until the coil is cold again, and the melt water runs out through a heated drain line.
Every one of those steps can fail on its own. A stuck timer, an open heater, a bad termination sensor, a fan delay that is not working, or a drain heater that quit will each produce a different ice pattern. Reading that pattern tells us where to start, which is why a picture of the coil sent when you call can be helpful.
Door traffic matters too. A freezer that gets opened constantly during prep or deliveries needs more defrost than one that stays closed, and the settings that worked when the box was installed may not fit how you use it now. Walk-in brands we commonly service include Kolpak and Norlake, with Heatcraft and Copeland condensing units. For more detail, read our guide to ice machines and freezer defrost timers and the walk-in cooler and freezer field manual.
Frozen product gives you more time than refrigerated product, but not unlimited time. What you do in the first hour has a lot to do with what you end up throwing away.
Freezer failures also tend to show up in summer, when condensing units on Treasure Valley rooftops are working hardest. Keeping the condenser coil clean before the heat arrives prevents a lot of these calls. If you would rather not think about it, a commercial maintenance plan puts it on a schedule.
A real review from our Google Business Profile.
"Tech that came out was quick and very knowledgeable in fixing our commercial freezer. Had another company that came out before them that thought they fixed and did not. I will use this company moving forward and you should too. They came all the way to Ontario oregon, and was quick in response."
Defrost, ice buildup and door problems explained
Freezer coils depend on a working defrost system. If a defrost heater burns out, the defrost timer or control stops initiating, the termination sensor fails, or the defrost settings are wrong for how often the door is used, frost builds up cycle after cycle until airflow stops. A failed evaporator fan or a door that does not seal will cause the same thing. We clear the coil and fix the part of the defrost system that failed.
Usually the condensate drain. Melt water from each defrost has to leave through a drain line that runs through a below-freezing box, so freezer drain lines use a heater. When that heater fails or the line is not pitched correctly, water refreezes in the drain pan or line and backs up, then drips and freezes on the floor or on product.
Freezer doors have heaters in the frame and sometimes in the gasket area to keep the seal from freezing to the frame. If a door frame heater fails, the door can stick, gaskets tear when it is forced open, and frost builds around the opening. A worn gasket or broken closer lets humid air in and makes everything worse.
It depends on how full the box is, how cold it was and how often the door is opened. A full, closed freezer holds temperature much longer than an empty one that is being opened every few minutes. Keep the door shut, log the temperature, and call us. If the box is warming steadily, start moving the highest-value product to another freezer.
Either, depending on what you have. Many walk-in freezers still use a mechanical defrost timer, and replacing a failed one with the same type is often the right call. In some boxes an electronic defrost control makes sense. We explain the options and the trade-offs before doing the work.
Yes. Regular service on a walk-in freezer focuses on the things that cause most emergency calls: cleaning the condenser coil, checking defrost heaters and termination, confirming the drain line heater is working, inspecting door heaters and gaskets, and checking refrigerant pressures. See our commercial maintenance page for details.
Call any time, day or night. Walk-in failures get priority dispatch, and we offer 2-hour emergency response. See all of our commercial refrigeration repair services.
Response times can vary with location, weather and call volume.
See what our customers are saying this week
2 months ago
"Tech that came out was quick and very knowledgeable in fixing our commercial freezer. Had another company that came out before them that thought they fixed and did not. I will use this company moving forward and you should too. They came all the way to Ontario oregon, and was quick in response."
Tell us what's down and we'll call you back. For refrigeration or equipment emergencies, call — we answer 24/7.
