Defrost System Failure
A frost-locked coil blocks airflow; warming is slow, then sudden.
A freezer that runs but does not freeze is an urgent call, not a wait-and-see problem. Potomac Refrigerator Pros takes freezer calls by phone only, Monday to Sunday, 8:00 AM to 10:00 PM. Call (301) 368-8305 with the freezer temperature, what you hear, and whether frost is building up. A written estimate comes before work starts — no form, no email booking.
Serving Potomac, North Potomac and Montgomery County, MD, centered in Potomac Village, MD 20854
Monday to Sunday, 8:00 AM to 10:00 PM
Name the exact symptom when you call, because a freezer that does not freeze is not one fault: a freezer warm while the fridge is still cold; both sections warm; food softening, ice cream melting, or the ice maker slowing; frost on the walls or coils; a freezer gone silent; or water pooling underneath. A thermometer reading helps more than a guess — the freezer should be at 0°F, per USDA and FoodSafety.gov guidance. Potomac adds pressure: July highs around 89°F in the wider Washington, DC area, humid summers, and older homes (median home age about 41 years, 2020–2024 ACS) leave a weak seal, a tired fan, or a frost-locked coil little margin before food warms. Garage and second units carry a winter risk too: in cold ambient air a standard unit may not cycle correctly, and a freezer can quietly thaw.
No single symptom maps to one part. Diagnosis is inspection, with a multimeter and temperature readings, not a phone guess.
A frost-locked coil blocks airflow; warming is slow, then sudden.
Cold air is not moving through the freezer, or the fan has stopped.
A torn gasket lets humid air in, so frost builds and the compressor runs nonstop.
Wrong temperature readings make the unit cycle badly or run constantly.
Dust and pet hair stop heat escaping, so the freezer still warms.
Never reaching temperature, or clicking at startup. Technician-only, and usually the most expensive outcome.
Food against vents, or a freezer too full for air to move, mimics a broken freezer.
Check power, breaker, and GFCI; check the setting, clear vents, and whether the door closes fully; take a thermometer reading and write it down; look at the seal for tears or flattening. Keep the door closed, and move perishables to a cooler if you can. A full freezer holds about 48 hours and a half-full freezer about 24 hours, door closed, per FoodSafety.gov; perishables above 40°F for over 2 hours — 1 hour if above 90°F — should be discarded, and food should never be tasted to check safety. Stop and call if water reaches electrics, you smell burning, or the breaker trips again. Never remove covers or touch refrigerant lines, and never chip ice with sharp tools.
Call: Call (301) 368-8305 with brand and model if known, the freezer temperature, frost or noise, water on the floor, and your area or ZIP code.
Diagnose on Site: Temperatures, defrost parts, fan, thermostat and sensor, coils, airflow, drain, and seals are tested. The failed part is named, not guessed.
Written Estimate Before Work: Plain-language diagnosis and estimate first, and you decide. Sealed-system failure on an old unit, with the replacement comparison, comes before any work.
Repair and Test: The failed part is replaced, frost is cleared, and coils are cleaned where needed. The freezer is verified at 0°F before the visit ends.
After: How to keep vents clear, check the seal, and keep coils accessible. No fixed-for-life promise, and no warranty term — warranty terms are unconfirmed and must come from the partner.
No Potomac-specific repair price dataset exists, and none is invented here. Market figures, not a quote, and not a Potomac price. Your written estimate is the only price that counts.
$138–$350 typical, most around $220.
Source: Thumbtack refrigerator repair cost, 2026.
$200–$1,300, average $650, most $300–$1,000 — higher, likely including larger and sealed-system jobs.
Source: HomeAdvisor refrigerator repair cost, 2025.
By part, HomeAdvisor: defrost motor $100–$440, thermostat $100–$440, door seal $50–$440, compressor $200–$450.
If repair costs more than about half a comparable new unit, replacement is usually favoured; if far less, repair usually wins. Lifespans (Fridge.com analysis of DOE/AHAM data) are about 14 years for a top-freezer, 13 for a bottom-freezer, and 12 for side-by-side and French-door units, with built-ins about 15 years — guides, not promises.
Repair almost always.
Apply the 50% test: a defrost part, fan, thermostat, or seal is an easy yes, while a sealed-system repair near half the replacement price is not.
Apply the 50% test; minor fixes such as a seal, filter, valve, or thermostat can be worth it at any age.
With a major failure, replacement is usually favoured; sealed-system repair on a standard unit over 10 years old rarely pays.
The exception: a repair buying two or three more years on a perfectly fitting unit can beat a swap needing joinery, and replacement add-ons can add several hundred dollars.
Call (301) 368-8305, Monday to Sunday, 8:00 AM to 10:00 PM. Serving Potomac, North Potomac and Montgomery County, MD, centered in Potomac Village, MD 20854. Outside this area, say your ZIP code on the call so range can be checked honestly.
Work is performed by a Maryland licensed holder.
Not sure you are in range? Call with your ZIP code — we are always happy to check.
Montgomery County, MD
Montgomery County, MD
Montgomery County, MD
Montgomery County, MD
Montgomery County, MD
Montgomery County, MD
Montgomery County, MD
Montgomery County, MD
Montgomery County, MD
Montgomery County, MD
Straight answers for a freezer not freezing in Potomac, MD — diagnosis first, written estimate before work.
When the fridge stays cold but the freezer warms, the freezer side is usually failing on its own: a defrost failure that frost-locks the freezer coil, a failed freezer evaporator fan, or a thermostat or sensor fault. The fridge section can keep working while the freezer section loses temperature.
Detail: Check vents and the door seal first, and take a thermometer reading — the freezer should be at 0°F. A technician tests defrost parts, fan, and sensor, clears any frost lock, and confirms the freezer reaches temperature before leaving. Source: market research, symptom-to-cause table.
A freezer should be at 0°F, and the fridge section at or below 40°F, according to USDA and FoodSafety.gov guidance. A freezer holding at 20°F instead of 0°F is not a minor gap: food quality and safety fall as temperature rises, even when food still feels cold.
Detail: Use a thermometer, not touch, and check after the doors have stayed closed for a few hours. If the reading stays above 0°F after a reset and a seal check, the freezer needs diagnosis. Source: USDA and FoodSafety.gov, via the market research.
Frost builds up when humid air enters through a leaking door seal or a door left ajar, or when the defrost system fails and frost on the coil is never cleared. In humid Potomac summers, a weak seal lets in enough moisture to frost a coil surprisingly fast.
Detail: Check the seal for tears or flattening and whether the door closes fully. Never chip ice with sharp tools, which can damage internal parts. A technician tests the seal and the defrost heater, thermostat, and control. Source: market research, frost causes.
A full freezer lasts about 48 hours and a half-full freezer about 24 hours, door closed, per FoodSafety.gov. Food may be refrozen only if it still has ice crystals or is at or below 40°F; when in doubt, throw it out, and never taste food to check safety.
Detail: Keep the door closed and move perishables to a cooler or a neighbour’s freezer if you can. Photograph discarded food before throwing it away, for insurance, without any promise of coverage. Source: FoodSafety.gov, via the market research.
First check power, breaker, and GFCI, then the temperature setting, then whether vents are blocked by food and whether the door closes fully. After that, take a thermometer reading — the freezer should be at 0°F — and write it down for the call.
Detail: These checks are safe and need no tools beyond a thermometer. If the breaker trips again, you smell burning, or water reaches electrics, stop and call a professional; do not keep resetting the breaker or removing covers. Source: market research, safe resident checks.
It depends on the fault, not the symptom alone. A defrost part, fan, thermostat, or seal repair is usually worth it, while a sealed-system repair on a standard unit over 10 years old usually is not, because the repair approaches replacement value and the unit has little life left.
Detail: Apply the 50% rule: if repair exceeds about half a comparable new unit, replacement is usually favoured. Check parts availability for a 10-plus-year model, and compare with a new unit including delivery and installation. Source: market research, repair-versus-replace framework.
Often, yes, when the cause is a defrost fault, a failed fan, a leaking seal, dirty coils, or a thermostat fault — all of which make a freezer run constantly without reaching temperature. A sealed-system fault is the harder case, and it needs a written estimate and a replacement comparison first.
Detail: Note whether the fan runs, whether frost is building, and what the thermometer reads; those three facts narrow the diagnosis. A technician tests fan, defrost parts, seal, coils, and sensor before naming the failed part. Source: market research, symptom-to-cause table.
Freezer not freezing? Call (301) 368-8305 and tell us the brand, model, and symptoms. You get a written estimate before any work starts. No form, no email booking — phone only.
Call (301) 368-8305Service Area Map, centered on Potomac Village, MD 20854, as a geographic center only.