--- title: "Frost or ice building up" description: "Thermador frost or ice building up — ice on the back wall, frost on packages, or a drawer frozen into place." url: "https://thermadormiami.support/symptoms/refrigerator-frost-buildup/" date_modified: "2026-08-18" Appliance type: "Built-in refrigerators & columns, Freezer columns" --- # Frost or ice building up Symptom # Thermador frost or ice building up Ice on the back wall, frost on packages, or a drawer frozen into place. Frost is water that arrived from somewhere, and on a built-in column that is usually a door. - **From $95** diagnostic, credited to the repair - **59** cities and neighborhoods covered - **OEM** parts available on order - **In writing** the price, before anything is opened ## Book a diagnostic visit Your model number and a line about what it is doing is enough to get started. Your details stay private. No spam, ever. Five ordinary causes ## What this usually turns out to be Cheapest and commonest first, which is also the order we check them in. They sit hundreds of dollars apart, and only the unit settles which one is yours. - A door seal that has hardened Warm humid air enters continuously and freezes on the coldest surface it meets. In this climate that happens quickly. [ Refrigerator door and gasket repair from $220 ](https://thermadormiami.support/services/refrigerator-door-and-gasket-repair/) ### A door seal that has hardened Warm humid air enters continuously and freezes on the coldest surface it meets. In this climate that happens quickly. - A door left ajar A drawer or a bottle holding the door off its seal by a few millimeters, which is enough. The door alarm usually says so first. ### A door left ajar A drawer or a bottle holding the door off its seal by a few millimeters, which is enough. The door alarm usually says so first. - The defrost cycle not clearing Ice builds on the evaporator, airflow drops, and the cabinet warms even though the compressor runs. This is a genuine repair. [ Condenser and fan service from $280 ](https://thermadormiami.support/services/condenser-and-fan-service/) ### The defrost cycle not clearing Ice builds on the evaporator, airflow drops, and the cabinet warms even though the compressor runs. This is a genuine repair. - A blocked drain Melt water that cannot leave refreezes, often as a sheet under the drawers. [ Condenser and fan service from $280 ](https://thermadormiami.support/services/condenser-and-fan-service/) ### A blocked drain Melt water that cannot leave refreezes, often as a sheet under the drawers. - Humid air, honestly An unconditioned garage or a kitchen open to the outside in August will frost a healthy cabinet faster than a sealed one indoors. ### Humid air, honestly An unconditioned garage or a kitchen open to the outside in August will frost a healthy cabinet faster than a sealed one indoors. In five minutes ## Before you call anybody None of it needs tools, and all of it makes the visit shorter. - 01 Paper test the seal Four points a side, corners first. That is where seals give up and where frost usually starts. ### Paper test the seal Four points a side, corners first. That is where seals give up and where frost usually starts. - 02 Look at where the ice is Rear wall points at defrost or airflow. Around the door points at the seal. Under the drawers points at the drain. ### Look at where the ice is Rear wall points at defrost or airflow. Around the door points at the seal. Under the drawers points at the drain. - 03 Check nothing is holding the door A bottle in a rack or a drawer not pushed home keeps a door a fraction open all night. ### Check nothing is holding the door A bottle in a rack or a drawer not pushed home keeps a door a fraction open all night. - 04 Note whether the temperature is holding Frost with correct temperatures is a different problem from frost with a cabinet that is drifting warm. ### Note whether the temperature is holding Frost with correct temperatures is a different problem from frost with a cabinet that is drifting warm. How it shows up ## What people describe when they call - “Ice on the rear wall of the cabinet” - “Frost on food and packaging” - “A drawer that has frozen shut” A shortcut ## Narrow it down before anybody arrives A description of the behaviour leaves a few possible causes. A code names the subsystem before anybody opens anything, which is why it is worth photographing before it clears. If the display is showing something - [ Temperature alarm Temperature alarm ](https://thermadormiami.support/error-codes/signal-temperature-alarm-refrigeration/) - [ Door alarm Door alarm ](https://thermadormiami.support/error-codes/signal-door-alarm-refrigeration/) Photograph it before it clears — codes do not wait. [ Search the full code list ](https://thermadormiami.support/error-codes/) In more detail ## About Thermador frost or ice building up ### Frost is a symptom of humidity, not of cold A sealed cabinet has very little moisture to freeze. Persistent frost means warm, damp air is getting in — a door that is not sealing, or one being opened more than the cabinet can recover from — or that the defrost cycle is not clearing what does form. ### Where the ice is tells you what it is - **On the rear wall** — the defrost cycle, or airflow across the evaporator - **Around the door opening** — the seal, or a door not closing square - **Under the drawers as a sheet** — a blocked drain that cannot let melt water out - **On the food itself** — usually the door being opened often in a very humid room ### Why it matters beyond the nuisance Ice on the evaporator blocks the airflow the cabinet depends on. The compressor then runs continuously, the temperature drifts anyway, and the appliance works far harder than it should for months before anything actually breaks. Frost is the visible early warning of that, which is why it is worth acting on rather than scraping off. This article is based on: - Official manufacturer documentation - Internal repair procedures - Technician repair history - Company quality standards Before you book ## Questions about thermador frost or ice building up It clears the ice and it does not fix the cause, so it will come back. It is worth doing if the cabinet is struggling and you need it working now — but treat it as buying time rather than as a repair. A light dusting that comes and goes with use, yes. A layer that grows week on week is not, and on a built-in column it is worth looking at early, because the same warm air that makes frost also makes the compressor run continuously. On separate columns those are two appliances, so it points at that door or that defrost cycle rather than at anything shared. Where we do it ## Across Miami-Dade, Broward, and Palm Beach Same terms everywhere we go: an on-site diagnostic first, the price agreed in writing, and the exact figure confirmed once we have seen the unit. ### [ Miami-Dade ](https://thermadormiami.support/service-area/miami-dade/) - [Aventura](https://thermadormiami.support/service-area/miami-dade/aventura/) - [Bal Harbour](https://thermadormiami.support/service-area/miami-dade/bal-harbour/) - [Bay Harbor Islands](https://thermadormiami.support/service-area/miami-dade/bay-harbor-islands/) - [Biscayne Park](https://thermadormiami.support/service-area/miami-dade/biscayne-park/) - [Coral Gables](https://thermadormiami.support/service-area/miami-dade/coral-gables/) - [Doral](https://thermadormiami.support/service-area/miami-dade/doral/) - [ 15 more places ](https://thermadormiami.support/service-area/miami-dade/) ### [ Broward ](https://thermadormiami.support/service-area/broward/) - [Cooper City](https://thermadormiami.support/service-area/broward/cooper-city/) - [Coral Springs](https://thermadormiami.support/service-area/broward/coral-springs/) - [Fort Lauderdale](https://thermadormiami.support/service-area/broward/fort-lauderdale/) - [Hallandale Beach](https://thermadormiami.support/service-area/broward/hallandale-beach/) - [Hillsboro Beach](https://thermadormiami.support/service-area/broward/hillsboro-beach/) - [Hollywood](https://thermadormiami.support/service-area/broward/hollywood/) - [ 5 more places ](https://thermadormiami.support/service-area/broward/) ### [ Palm Beach ](https://thermadormiami.support/service-area/palm-beach/) - [Boca Raton](https://thermadormiami.support/service-area/palm-beach/boca-raton/) - [Delray Beach](https://thermadormiami.support/service-area/palm-beach/delray-beach/) - [Highland Beach](https://thermadormiami.support/service-area/palm-beach/highland-beach/) - [Jupiter](https://thermadormiami.support/service-area/palm-beach/jupiter/) - [Palm Beach Gardens](https://thermadormiami.support/service-area/palm-beach/palm-beach-gardens/) - [ 2 more places ](https://thermadormiami.support/service-area/palm-beach/) Neighborhoods people ask for by name - [Brickell](https://thermadormiami.support/service-area/miami-dade/miami/brickell/) - [Coconut Grove](https://thermadormiami.support/service-area/miami-dade/miami/coconut-grove/) - [Cocoplum](https://thermadormiami.support/service-area/miami-dade/coral-gables/cocoplum/) - [Design District](https://thermadormiami.support/service-area/miami-dade/miami/design-district/) - [Gables Estates](https://thermadormiami.support/service-area/miami-dade/coral-gables/gables-estates/) - [Old Cutler](https://thermadormiami.support/service-area/miami-dade/old-cutler/) - [South of Fifth (SoFi)](https://thermadormiami.support/service-area/miami-dade/miami-beach/south-of-fifth/) - [Star Island](https://thermadormiami.support/service-area/miami-dade/miami-beach/star-island/) - [Coral Ridge](https://thermadormiami.support/service-area/broward/fort-lauderdale/coral-ridge/) - [Harbor Beach](https://thermadormiami.support/service-area/broward/fort-lauderdale/harbor-beach/) - [Harbor Islands](https://thermadormiami.support/service-area/broward/hollywood/harbor-islands/) - [Las Olas](https://thermadormiami.support/service-area/broward/fort-lauderdale/las-olas/) - [Rio Vista](https://thermadormiami.support/service-area/broward/fort-lauderdale/rio-vista/) - [Seven Isles](https://thermadormiami.support/service-area/broward/fort-lauderdale/seven-isles/) - [The Landings](https://thermadormiami.support/service-area/broward/fort-lauderdale/the-landings/) - [Admirals Cove](https://thermadormiami.support/service-area/palm-beach/jupiter/admirals-cove/) - [BallenIsles](https://thermadormiami.support/service-area/palm-beach/palm-beach-gardens/ballenisles/) - [Mirasol](https://thermadormiami.support/service-area/palm-beach/palm-beach-gardens/mirasol/) - [Royal Palm Yacht & Country Club](https://thermadormiami.support/service-area/palm-beach/boca-raton/royal-palm-yacht-and-country-club/) ## Tell us the model number and what it is doing. --- **[Read full article: Frost or ice building up](https://thermadormiami.support/symptoms/refrigerator-frost-buildup/)**