The short answer
On a Blomberg freezer, complaints about ice split two ways: too much of it, which is a sealing or defrost problem, and too little from an ice maker where one is fitted, which is a water-supply problem. Establish which of the two you have before doing anything, because they share no causes at all.
What you are seeing
- A thick sheet of frost building on the back wall of the cabinet
- Frost forming on the packages themselves rather than on the walls
- An ice maker producing nothing at all
- An ice maker producing hollow or partial cubes
- Ice cubes that smell or taste of the freezer contents
- A near-miss symptom: water pooling under the drawers, which belongs on the leak page
- Body: The two faults look nothing alike: A thick sheet of frost building on the back wall of the cabinet. Frost forming on the packages themselves rather than on the walls. An ice maker producing nothing at all. An ice maker producing hollow or partial cubes. Ice cubes that smell or taste of the freezer contents. A near-miss symptom: water pooling under the drawers, which belongs on the leak page.
Causes, most likely first
- A door left ajar or a gasket not sealing — Why: warm moist air entering the cabinet condenses and freezes on the coldest surface, and this is the cause of almost all excess-frost complaints.
- Overpacked drawers blocking the airflow — Why: air that cannot circulate deposits its moisture in one place, which is why frost builds on packages rather than being carried to the evaporator.
- A closed or restricted water supply where an ice maker is fitted — Why: the valve behind the cabinet is often closed during installation or later plumbing work, and the ice maker then produces nothing at all.
- The ice maker arm or switch left in the off position — Why: a lever knocked while loading the freezer stops production silently, and it is the first thing to check before any plumbing.
- A blocked or frozen fill tube — Why: this gives partial or hollow cubes, which is the signature that separates it from a supply that is fully closed.
- A failed defrost heater or thermostat — Why: frost that returns after every manual defrost points here, and it is the one cause in this list that needs a technician.
- Body: Ranked across both halves of the complaint: First, A door left ajar or a gasket not sealing: warm moist air entering the cabinet condenses and freezes on the coldest surface, and this is the cause of almost all excess-frost complaints. Second, Overpacked drawers blocking the airflow: air that cannot circulate deposits its moisture in one place, which is why frost builds on packages rather than being carried to the evaporator. Third, A closed or restricted water supply where an ice maker is fitted: the valve behind the cabinet is often closed during installation or later plumbing work, and the ice maker then produces nothing at all. Fourth, The ice maker arm or switch left in the off position: a lever knocked while loading the freezer stops production silently, and it is the first thing to check before any plumbing. Fifth, A blocked or frozen fill tube: this gives partial or hollow cubes, which is the signature that separates it from a supply that is fully closed. Sixth, A failed defrost heater or thermostat: frost that returns after every manual defrost points here, and it is the one cause in this list that needs a technician.
What to check, in order
- decide whether you have too much frost or too little ice, because nothing below applies to both.
- for frost, check the door seal and the packing, since air ingress explains nearly all of it.
- for an ice maker, check the arm or switch position and then the water valve behind the cabinet.
- if frost returns within days of a full manual defrost, the defrost system itself is the fault.
- Body: Split the fault first, then follow one branch: First, decide whether you have too much frost or too little ice, because nothing below applies to both. Second, for frost, check the door seal and the packing, since air ingress explains nearly all of it. Third, for an ice maker, check the arm or switch position and then the water valve behind the cabinet. Fourth, if frost returns within days of a full manual defrost, the defrost system itself is the fault.
Checks you can do yourself
- Close the door on a paper strip at several points round the gasket and note where it pulls out freely — Tools: paper strip — Time estimate: a few minutes
- Rearrange the drawers so nothing blocks the vents on the back wall and nothing holds the door open — Tools: none — Time estimate: a few minutes
- If an ice maker is fitted, check its arm or switch is in the on position — Tools: torch — Time estimate: a few minutes
- Check the water valve behind the cabinet is fully open and the supply line is not kinked — Tools: torch — Time estimate: a few minutes
- If frost is heavy, empty the cabinet and let it defrost fully with the door open and towels down — Tools: towels — Time estimate: overnight
- Body: Work one branch at a time: Close the door on a paper strip at several points round the gasket and note where it pulls out freely (paper strip; a few minutes). Rearrange the drawers so nothing blocks the vents on the back wall and nothing holds the door open (none; a few minutes). If an ice maker is fitted, check its arm or switch is in the on position (torch; a few minutes). Check the water valve behind the cabinet is fully open and the supply line is not kinked (torch; a few minutes). If frost is heavy, empty the cabinet and let it defrost fully with the door open and towels down (towels; overnight).
Safety first
Safety
A freezer holds food safely at 0 °F (−18 °C) or below. Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Never chip ice off an evaporator with a knife or a screwdriver: the tubing carries a flammable hydrocarbon refrigerant and is easily punctured. Never use a heat gun or a hairdryer close to the plastic liner. unplug-before-service freezer-0f
When to stop and call a technician
These are technician work: Frost returns within days of a complete manual defrost. The ice maker does nothing with the arm on and the water valve open. Cubes are consistently hollow or partial after the supply has been checked. The back wall ices up while the door seal passes the paper test. Frost returns within days of a complete manual defrost The ice maker does nothing with the arm on and the water valve open Cubes are consistently hollow or partial after the supply has been checked The back wall ices up while the door seal passes the paper test
Nearest pages of the same kind
What this page does not cover
This page is generalized across every freezer sold under the Blomberg name: it separates neither the freestanding cabinets from the integrated ones and the under-counter models from the full-height ones, and it names no individual model. Where a family- or model-specific page exists it is linked here and it outranks this one for that machine; at present no page beneath this one narrows to a single family, so treat the ranking above as the brand-level pattern rather than a reading of your serial plate. For the other faults that turn up on this machine, start from Common Blomberg Freezer Problems.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
