The short answer
This page picks up where the first-pass checks end: with the cabinet level, clear of the wall and free of resonating contents, a noise that remains is mechanical, and when it happens narrows it further. If you have not yet cleared the vents, tested the door seal and cleaned the condenser, start with the general page for this symptom, because everything below assumes those are done.
What you are seeing
- A noise that is present only while the compressor runs
- A buzzing or rattling that comes and goes
- A rhythmic ticking from the back of the cabinet
- A whirring that changes when the fridge door is opened
- A grinding or scraping from inside the cabinet
- A near-miss symptom: a click every few hours, which is the defrost timer working normally
- Body: The character of the noise identifies the source: A noise that is present only while the compressor runs. A buzzing or rattling that comes and goes. A rhythmic ticking from the back of the cabinet. A whirring that changes when the fridge door is opened. A grinding or scraping from inside the cabinet. A near-miss symptom: a click every few hours, which is the defrost timer working normally.
Causes, most likely first
- A noise that is present only while the compressor runs — Why: this separates a compressor mount or the compressor itself from a fan, because a fan on a frost-free cabinet also runs between compressor cycles.
- A noise that changes when the fridge door is opened — Why: the door switch usually stops the internal fan, so a noise that stops with the door open is the fan and a noise that continues is not.
- The evaporator fan brushing frost — Why: a whirring or scraping that changes when the door is opened, and it is the most common genuine mechanical fault on a frost-free cabinet.
- The cabinet not level or rocking on one foot — Why: a rocking cabinet rattles against the floor and the noise gets blamed on the compressor.
- Bottles and packages resonating — Why: items on top of or inside the cabinet vibrate with the compressor, producing an intermittent rattle that is trivially eliminated.
- A failing fan motor or compressor mount — Why: the least common, and it is continuous, unaffected by opening the door or moving the contents.
- Body: Ranked for a fan-circulated cabinet in a domestic kitchen: First, A noise that is present only while the compressor runs: this separates a compressor mount or the compressor itself from a fan, because a fan on a frost-free cabinet also runs between compressor cycles. Second, A noise that changes when the fridge door is opened: the door switch usually stops the internal fan, so a noise that stops with the door open is the fan and a noise that continues is not. Third, The evaporator fan brushing frost: a whirring or scraping that changes when the door is opened, and it is the most common genuine mechanical fault on a frost-free cabinet. Fourth, The cabinet not level or rocking on one foot: a rocking cabinet rattles against the floor and the noise gets blamed on the compressor. Fifth, Bottles and packages resonating: items on top of or inside the cabinet vibrate with the compressor, producing an intermittent rattle that is trivially eliminated. Sixth, A failing fan motor or compressor mount: the least common, and it is continuous, unaffected by opening the door or moving the contents.
What to check, in order
- use the door switch as a test: hold it in and release it while listening, because it turns the fan on and off without any dismantling.
- check the cabinet is not touching a wall, a worktop or another appliance.
- rock each corner and adjust the feet until the cabinet sits firm.
- move loose items on top of and inside the cabinet, since resonating packages account for many rattles.
- Body: Eliminate the free explanations in order: First, use the door switch as a test: hold it in and release it while listening, because it turns the fan on and off without any dismantling. Second, check the cabinet is not touching a wall, a worktop or another appliance. Third, rock each corner and adjust the feet until the cabinet sits firm. Fourth, move loose items on top of and inside the cabinet, since resonating packages account for many rattles.
Checks you can do yourself
- Listen with the door open, then with the door switch held in, and note whether the noise follows the fan or the compressor — Tools: a torch — Time estimate: a few minutes
- Ease the cabinet away from the wall and from any neighbouring unit — Tools: none — Time estimate: a few minutes
- Rock each corner and adjust the feet until all four are firmly down — Tools: adjustable spanner — Time estimate: a few minutes
- Remove bottles and packages from the top of the cabinet and rearrange the contents of the shelves — Tools: none — Time estimate: a few minutes
- Unplug the cabinet, pull it forward and check nothing is resting against the pipework at the back — Tools: torch — Time estimate: a few minutes
- Body: A few minutes settles most complaints: Listen with the door open, then with the door switch held in, and note whether the noise follows the fan or the compressor (a torch; a few minutes). Ease the cabinet away from the wall and from any neighbouring unit (none; a few minutes). Rock each corner and adjust the feet until all four are firmly down (adjustable spanner; a few minutes). Remove bottles and packages from the top of the cabinet and rearrange the contents of the shelves (none; a few minutes). Unplug the cabinet, pull it forward and check nothing is resting against the pipework at the back (torch; a few minutes).
Safety first
Safety
A refrigerator holds food safely at 40 °F (4 °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 remove the internal rear panel to reach a fan: the evaporator behind it carries a flammable refrigerant and is easily punctured. Do not chip at ice around a fan. unplug-before-service fridge-40f
When to stop and call a technician
These need a technician: The noise follows the compressor rather than the fan, which means a mount or the compressor itself. A noise that arrives together with a temperature or frost complaint. A compressor hum that has grown steadily louder over weeks. Any noise accompanied by an unusual smell or an unusually hot cabinet side. The noise follows the compressor rather than the fan, which means a mount or the compressor itself A noise that arrives together with a temperature or frost complaint A compressor hum that has grown steadily louder over weeks Any noise accompanied by an unusual smell or an unusually hot cabinet side
Nearest pages of the same kind
What this page does not cover
This page is generalized across every refrigerator sold under the Blomberg name: it separates neither the counter-depth cabinets from the deeper ones and the freestanding models from the integrated 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. This page assumes the first-pass checks are already done; the general page for this symptom covers those, and the Bloomberg spelling covers the same cabinets in an integrated installation. For the other faults that turn up on this machine, start from Common Blomberg Refrigerator Problems.
Links down: - [Blomberg refrigerator problems — the first-pass checks](/blog/blomberg-refrigerator-problems)
Related pages
- Common Blomberg Refrigerator Problems
- Blomberg Refrigerator: Controls, Display or Error Code
- Blomberg Refrigerator: Not Cooling or Not Freezing
- Blomberg Refrigerator: Door, Latch or Seal Fault
- Blomberg Refrigerator: Ice Maker Fault
- Blomberg Refrigerator: Water Leak
- Blomberg Refrigerator: Will Not Start or No Power
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
