--- title: "Freezer Defrost System Repair | FreezerRepair.center" description: "Repairing the heater, the defrost thermostat or sensor and the timer or board that keep ice off the hidden coil in a frost-free upright, column or undercounter…" url: "https://freezerrepair.center/services/defrost-system-repair/" --- # Freezer Defrost System Repair Repairing the heater, the defrost thermostat or sensor and the timer or board that keep ice off the hidden coil in a frost-free upright, column or undercounter freezer. ## What the freezer defrost system repair involves. A frost-free freezer is not free of frost; it melts its frost on a schedule. Every several hours the compressor pauses, a heater under the evaporator coil switches on, and a thermostat or sensor clipped to the coil shuts the heater off once the ice is gone. The water runs down a trough to the drain and out to a pan near the floor. When any piece of that chain stops, the frost never leaves: it thickens behind the rear panel until the fan can no longer push air through the coil, and the food starts to soften from the top shelf down, sometimes weeks after the real failure. The technician removes the panel, looks at how the ice has packed, and tests the heater, the defrost thermostat or sensor, and the timer or the control that calls for defrost. The failed part is replaced, the coil is thawed completely, and the drain is cleared so the new cycle has somewhere to send its water. How the visit goes ### What it usually costs Low to moderate · Defrost heater, defrost thermostat or timer The parts are modest, and most of the time goes into emptying the lower shelves, opening the back panel and thawing a packed coil. A defrost control built into the main board moves the job up a step. ### Answers 5 problems Heavy Frost Buildup in the Freezer Standalone Freezer Not Freezing · Water Under or Around the Freezer · Freezer Runs All the Time · Freezer Error Code ### Comes up most on Upright freezer Freezer column · Undercounter freezer ### Codes that lead here F2 · F42 · Ed · TEL Fisher & Paykel F2 on a column freezer: defrost heater group. ## Freezer defrost system repair, step by step. Close the panel, restart the freezer and tell you what failed and how to spot it early next time. 01 Clear the lower shelves, remove the rear panel and read how thick and where the ice has built on the coil. 02 Test the defrost heater for continuity and the defrost thermostat or sensor at its temperature. 03 Check the timer or the board that starts the cycle by forcing a defrost and watching the heater warm. 04 Replace the failed part, thaw the coil fully and flush the drain trough and the tube to the pan. 05 Close the panel, restart the freezer and tell you what failed and how to spot it early next time. ## The problems it answers. 5 of them, from heavy frost buildup in the freezer to freezer error code. [All problems](https://freezerrepair.center/problems/) Most common ### Heavy Frost Buildup in the Freezer 5 causes, cheapest first Before you call ### Tell us this when you book 1. Whether frost or ice shows through the vents on the back wall of the freezer 2. Whether the problem goes away for a while after the freezer is unplugged and thawed 3. If there is water or ice on the floor of the freezer or under the cabinet 4. Whether the freezer is frost-free or needs to be defrosted by hand, if you know It also answers - [**Standalone Freezer Not Freezing** 6 causes · food at risk now](https://freezerrepair.center/problems/freezer-not-freezing/) - [**Water Under or Around the Freezer** 5 causes](https://freezerrepair.center/problems/freezer-leaking-water/) - [**Freezer Runs All the Time** 6 causes](https://freezerrepair.center/problems/freezer-running-constantly/) - [**Freezer Error Code** 7 causes](https://freezerrepair.center/problems/freezer-error-code/) ## Low to moderate, on the site's scale. The parts are modest, and most of the time goes into emptying the lower shelves, opening the back panel and thawing a packed coil. A defrost control built into the main board moves the job up a step. [Read the full cost guide](https://freezerrepair.center/cost/) | Repair | Relative cost | | --- | --- | | [Start relay, overload or compressor](https://freezerrepair.center/services/compressor-and-start-relay-repair/) | | | [Refrigerant leak, restriction and recharge](https://freezerrepair.center/services/sealed-system-and-refrigerant-leak-repair/) | | | **Defrost heater, defrost thermostat or timer** | low to moderate | | [Evaporator or condenser fan motor](https://freezerrepair.center/services/evaporator-and-condenser-fan-repair/) | | | [Thermostat, temperature sensor or garage kit](https://freezerrepair.center/services/thermostat-and-temperature-control-repair/) | | | [Door, lid or drawer gasket](https://freezerrepair.center/services/door-and-lid-gasket-replacement/) | | | [Drain tube, drain pan or drain plug](https://freezerrepair.center/services/freezer-drain-and-defrost-water-repair/) | | | [Control board, display, door switch or alarm](https://freezerrepair.center/services/control-board-and-alarm-repair/) | | | [Hinge, lid springs, latch or drawer rails](https://freezerrepair.center/services/freezer-hinge-lid-and-latch-repair/) | | ## Where it comes up most. Most bookings: Upright freezer, Freezer column, Undercounter freezer. [All freezer types](https://freezerrepair.center/types/) Codes that lead here - [`F2` Fisher & Paykel · Defrost system](https://freezerrepair.center/error-codes/fisher-and-paykel-f2/) - [`Ed` Marvel · Defrost system](https://freezerrepair.center/error-codes/marvel-ed/) - [`TEL` Perlick · Defrost system](https://freezerrepair.center/error-codes/perlick-tel/) - [`21` Sub-Zero · Defrost system](https://freezerrepair.center/error-codes/sub-zero-21/) [All 9 codes that lead here](https://freezerrepair.center/error-codes/#family-defrost) Often the same visit - [**Freezer diagnostic visit** 3 problems in common](https://freezerrepair.center/services/diagnostic-visit/) - [**Freezer sealed system and refrigerant leak repair** 3 problems in common · highest](https://freezerrepair.center/services/sealed-system-and-refrigerant-leak-repair/) - [**Freezer drain and defrost water repair** 2 problems in common · lowest](https://freezerrepair.center/services/freezer-drain-and-defrost-water-repair/) ### Upright freezer ### Freezer column ### Undercounter freezer ## The makes we see it on. 28 makes on this site, and the freezer defrost system repair on any of them. Each mark opens that make's own page. [All 28 brands](https://freezerrepair.center/brands/) ## Freezer defrost system repair, where we come out. The home, the climate and the building all change how the freezer defrost system repair goes. These notes are about that, metro by metro. [All service areas](https://freezerrepair.center/locations/) [Tampa Bay](https://freezerrepair.center/locations/tampa-bay/) FL · 31 areas Tampa Bay humidity fills a frost-free upright with wet air every time its door opens, so a defrost heater or thermostat that quits shows up within days as a white-coated back panel and a cabinet that warms from the top shelf down. - [Hyde Park](https://freezerrepair.center/locations/tampa-bay/hyde-park/) - [Davis Islands](https://freezerrepair.center/locations/tampa-bay/davis-islands/) - [Palma Ceia](https://freezerrepair.center/locations/tampa-bay/palma-ceia/) - [Westchase](https://freezerrepair.center/locations/tampa-bay/westchase/) - [Carrollwood](https://freezerrepair.center/locations/tampa-bay/carrollwood/) - [Belleair](https://freezerrepair.center/locations/tampa-bay/belleair/) - [St. Pete Beach](https://freezerrepair.center/locations/tampa-bay/st-pete-beach/) - [Palm Harbor](https://freezerrepair.center/locations/tampa-bay/palm-harbor/) [Orlando](https://freezerrepair.center/locations/orlando/) FL · 30 areas In an Orlando vacation home the upright freezer is opened by one party of guests after another, each letting in hot, damp air, and a failed defrost part is often discovered by the next cleaning crew as a wall of ice behind the baskets. - [Winter Park](https://freezerrepair.center/locations/orlando/winter-park/) - [Windermere](https://freezerrepair.center/locations/orlando/windermere/) - [Dr. Phillips](https://freezerrepair.center/locations/orlando/dr-phillips/) - [Bay Hill](https://freezerrepair.center/locations/orlando/bay-hill/) - [Lake Nona](https://freezerrepair.center/locations/orlando/lake-nona/) - [Heathrow](https://freezerrepair.center/locations/orlando/heathrow/) - [Celebration](https://freezerrepair.center/locations/orlando/celebration/) [Miami / South Florida](https://freezerrepair.center/locations/south-florida/) FL · 47 areas South Florida air holds so much moisture that a frost-free freezer leans hard on its defrost cycle, and when the heater, the limit switch or the timer stops, the evaporator packs with ice and the fan starts scraping within a week or two. - [Brickell](https://freezerrepair.center/locations/south-florida/brickell/) - [Coconut Grove](https://freezerrepair.center/locations/south-florida/coconut-grove/) - [Coral Gables](https://freezerrepair.center/locations/south-florida/coral-gables/) - [Pinecrest](https://freezerrepair.center/locations/south-florida/pinecrest/) - [Key Biscayne](https://freezerrepair.center/locations/south-florida/key-biscayne/) - [Aventura](https://freezerrepair.center/locations/south-florida/aventura/) - [Sunny Isles Beach](https://freezerrepair.center/locations/south-florida/sunny-isles-beach/) - [Bal Harbour](https://freezerrepair.center/locations/south-florida/bal-harbour/) - [Miami Beach](https://freezerrepair.center/locations/south-florida/miami-beach/) - [Golden Beach](https://freezerrepair.center/locations/south-florida/golden-beach/) - [Weston](https://freezerrepair.center/locations/south-florida/weston/) - [Boca Raton](https://freezerrepair.center/locations/south-florida/boca-raton/) - [Palm Beach](https://freezerrepair.center/locations/south-florida/palm-beach/) [New York Metro](https://freezerrepair.center/locations/new-york/) NY · 75 areas An upright freezer kept in a small, warm New York kitchen through a humid July grows frost back quickly once a defrost part fails, and the repair tests the heater, the sensor and the control rather than just melting the ice and leaving. - [Upper East Side](https://freezerrepair.center/locations/new-york/upper-east-side/) - [Upper West Side](https://freezerrepair.center/locations/new-york/upper-west-side/) - [Tribeca](https://freezerrepair.center/locations/new-york/tribeca/) - [SoHo](https://freezerrepair.center/locations/new-york/soho/) - [Greenwich Village](https://freezerrepair.center/locations/new-york/greenwich-village/) - [Battery Park City](https://freezerrepair.center/locations/new-york/battery-park-city/) - [Brooklyn Heights](https://freezerrepair.center/locations/new-york/brooklyn-heights/) - [Park Slope](https://freezerrepair.center/locations/new-york/park-slope/) - [DUMBO](https://freezerrepair.center/locations/new-york/dumbo/) - [Forest Hills](https://freezerrepair.center/locations/new-york/forest-hills/) - [Great Neck](https://freezerrepair.center/locations/new-york/great-neck/) - [Southampton](https://freezerrepair.center/locations/new-york/southampton/) - [Scarsdale](https://freezerrepair.center/locations/new-york/scarsdale/) [Houston](https://freezerrepair.center/locations/houston/) TX · 36 areas Houston's humid months expose a failed defrost system on a frost-free upright almost at once, and in a garage the repair also checks the door seal, since no defrost cycle can keep up with a gasket that leaks steamy air all day. - [River Oaks](https://freezerrepair.center/locations/houston/river-oaks/) - [Memorial](https://freezerrepair.center/locations/houston/memorial/) - [Tanglewood](https://freezerrepair.center/locations/houston/tanglewood/) - [Greater Heights](https://freezerrepair.center/locations/houston/greater-heights/) - [Kingwood](https://freezerrepair.center/locations/houston/kingwood/) - [Bellaire](https://freezerrepair.center/locations/houston/bellaire/) - [Bunker Hill Village](https://freezerrepair.center/locations/houston/bunker-hill-village/) - [Piney Point Village](https://freezerrepair.center/locations/houston/piney-point-village/) - [Hunters Creek Village](https://freezerrepair.center/locations/houston/hunters-creek-village/) - [Sugar Land](https://freezerrepair.center/locations/houston/sugar-land/) - [Cinco Ranch](https://freezerrepair.center/locations/houston/cinco-ranch/) - [The Woodlands](https://freezerrepair.center/locations/houston/the-woodlands/) - [West University](https://freezerrepair.center/locations/houston/west-university/) [Chicago](https://freezerrepair.center/locations/chicagoland/) IL · 50 areas Most Chicagoland chest freezers are manual-defrost, so what looks like a broken defrost system is often a season's frost that simply needs melting out; the frost-free uprights beside them have heaters and timers, and those are what this repair tests. - [Lincoln Park](https://freezerrepair.center/locations/chicagoland/lincoln-park/) - [Near North Side](https://freezerrepair.center/locations/chicagoland/near-north-side/) - [West Loop / Near West Side](https://freezerrepair.center/locations/chicagoland/west-loop-near-west-side/) - [Wilmette](https://freezerrepair.center/locations/chicagoland/wilmette/) - [Winnetka](https://freezerrepair.center/locations/chicagoland/winnetka/) - [Glencoe](https://freezerrepair.center/locations/chicagoland/glencoe/) - [River Forest](https://freezerrepair.center/locations/chicagoland/river-forest/) - [Oak Park](https://freezerrepair.center/locations/chicagoland/oak-park/) - [Hinsdale](https://freezerrepair.center/locations/chicagoland/hinsdale/) - [Lake Forest](https://freezerrepair.center/locations/chicagoland/lake-forest/) - [Highland Park](https://freezerrepair.center/locations/chicagoland/highland-park/) - [Gold Coast](https://freezerrepair.center/locations/chicagoland/gold-coast/) - [Lakeview](https://freezerrepair.center/locations/chicagoland/lakeview/) [Los Angeles](https://freezerrepair.center/locations/los-angeles/) CA · 95 areas In the dry air of inland Los Angeles a frost-free upright builds frost slowly, so a heavy coat on its back panel points clearly to a defrost heater, sensor or board rather than humidity, and the repair tests each of them in turn. - [Beverly Hills](https://freezerrepair.center/locations/los-angeles/beverly-hills/) - [Bel Air](https://freezerrepair.center/locations/los-angeles/bel-air/) - [Holmby Hills](https://freezerrepair.center/locations/los-angeles/holmby-hills/) - [Brentwood](https://freezerrepair.center/locations/los-angeles/brentwood/) - [Pacific Palisades](https://freezerrepair.center/locations/los-angeles/pacific-palisades/) - [Santa Monica](https://freezerrepair.center/locations/los-angeles/santa-monica/) - [Hancock Park](https://freezerrepair.center/locations/los-angeles/hancock-park/) - [Studio City](https://freezerrepair.center/locations/los-angeles/studio-city/) - [Calabasas](https://freezerrepair.center/locations/los-angeles/calabasas/) - [Manhattan Beach](https://freezerrepair.center/locations/los-angeles/manhattan-beach/) - [Palos Verdes Estates](https://freezerrepair.center/locations/los-angeles/palos-verdes-estates/) - [Pasadena](https://freezerrepair.center/locations/los-angeles/pasadena/) - [San Marino](https://freezerrepair.center/locations/los-angeles/san-marino/) - [Malibu](https://freezerrepair.center/locations/los-angeles/malibu/) [San Diego](https://freezerrepair.center/locations/san-diego/) CA · 31 areas Coastal San Diego's marine layer keeps garage air damp even in the dry months, and an upright freezer out there with a failing defrost heater frosts over faster than owners expect from such a mild climate. - [La Jolla](https://freezerrepair.center/locations/san-diego/la-jolla/) - [Carmel Valley](https://freezerrepair.center/locations/san-diego/carmel-valley/) - [Point Loma](https://freezerrepair.center/locations/san-diego/point-loma/) - [Del Mar](https://freezerrepair.center/locations/san-diego/del-mar/) - [Rancho Santa Fe](https://freezerrepair.center/locations/san-diego/rancho-santa-fe/) - [Coronado](https://freezerrepair.center/locations/san-diego/coronado/) - [Encinitas](https://freezerrepair.center/locations/san-diego/encinitas/) - [Solana Beach](https://freezerrepair.center/locations/san-diego/solana-beach/) [San Francisco Bay Area](https://freezerrepair.center/locations/bay-area/) CA · 74 areas Fog along the Bay Area shoreline leaves garages and basements damp, so a frost-free freezer kept there depends on its defrost system more than the mild weather suggests, and a stalled cycle is often found behind a frosted rear panel. - [Pacific Heights](https://freezerrepair.center/locations/bay-area/pacific-heights/) - [Presidio Heights](https://freezerrepair.center/locations/bay-area/presidio-heights/) - [Russian Hill](https://freezerrepair.center/locations/bay-area/russian-hill/) - [Noe Valley](https://freezerrepair.center/locations/bay-area/noe-valley/) - [Sea Cliff](https://freezerrepair.center/locations/bay-area/sea-cliff/) - [Hillsborough](https://freezerrepair.center/locations/bay-area/hillsborough/) - [Atherton](https://freezerrepair.center/locations/bay-area/atherton/) - [Woodside](https://freezerrepair.center/locations/bay-area/woodside/) - [Palo Alto](https://freezerrepair.center/locations/bay-area/palo-alto/) - [Los Altos Hills](https://freezerrepair.center/locations/bay-area/los-altos-hills/) - [Tiburon](https://freezerrepair.center/locations/bay-area/tiburon/) - [Piedmont](https://freezerrepair.center/locations/bay-area/piedmont/) - [Marina](https://freezerrepair.center/locations/bay-area/marina/) For the heart of your home. ## Questions about the freezer defrost system repair. ### Does my chest freezer have a defrost system? Almost never. A chest freezer and many small uprights are manual defrost: the frost is melted off by hand once it gets thick. What looks like a defrost problem on a chest is usually a lid that is not sealing, so the frost comes back much faster than it should. ### Why does my frost-free freezer work for a week after I unplug it and then fail again? Unplugging it melted the ice on the coil, so air could flow again. With the heater, the defrost thermostat or the control still not working, the same ice builds back over the next several days. The repair replaces the part that stopped the cycle. ### Is it safe to melt the ice on the coil with a heat gun or a pan of hot water? It is risky. Plastic liners warp under direct heat, water can reach wiring, and hot spots can crack a part. Leaving the freezer unplugged with the door open and towels down is slower but safer, and it is only a stopgap until the defrost part is replaced. --- **[Read on the site: Freezer Defrost System Repair | FreezerRepair.center](https://freezerrepair.center/services/defrost-system-repair/)** **[Book a visit with FreezerRepair.center](https://freezerrepair.center/schedule/)**