The short answer
On a cabinet of this age the condenser fan has been running in floor dust for decades, and that is where the noise starts. Ranked first on this platform: The condenser fan fouling on debris. The checks below follow that ranking, and the first of them need no tools and no panel removed.
What you observe
- Ticking that arrives with the compressor and leaves with it — A noise tied to the cycle belongs to something that only runs during it.
- A steady drone lasting exactly as long as each compressor run — Duration matching the run exactly is a transmitted vibration.
- The noise changes if you lean on a corner of the cabinet — A sound that responds to your weight is a mounting sound.
- NEAR MISS — a gurgle, a trickle or a soft tick a few minutes after it stops — Refrigerant settling and metal contracting are normal on every cabinet and no repair removes them.
Causes, most likely first on this platform
- The condenser fan fouling on debris — The fan at the back or underneath runs in the dust. It ranks first on this platform because the machine compartment on this platform is open at the back and has usually never been cleaned, so a dust rope on the blade gives a tick that arrives with the compressor and disappears with it.
- Hardened compressor mounts — The rubber grommets under the compressor are there to keep its vibration out of the shell. It ranks second here because a cabinet of this vintage has wear on everything at once, which changes the ranking: the parts that wear are far more likely than the parts that break.
- The cabinet rocking on uneven feet — A cabinet resting on three feet turns ordinary compressor vibration into a drum. Ranked third: worth checking once the causes above have come back clean.
- Suction tubing touching the cabinet — The tubing between the compressor and the cabinet is deliberately shaped to flex. It ranks fourth rather than higher: real on this platform, and less common than the causes above it.
Check in this order, and why
- Listen at the lower grille as the compressor starts — Timing places it at the machine compartment. It leads because it tests the top-ranked cause.
- Press firmly on the base pan near the compressor while it runs — A noise that changes under hand pressure is mounted wrong rather than failing. Tests the second-ranked cause.
- Push each top corner diagonally and watch for movement — Seconds, and it finds the commonest cause on any platform. Tests the third-ranked cause.
What an owner can safely check
- Unplug the cabinet and clear the compartment with a vacuum and a brush — Never spin a blade by hand with the appliance plugged in.
Tools: vacuum, soft brushAbout 25 min
- Level the cabinet on its feet until no corner moves under hand pressure — Check it loaded, not empty — the load changes how it sits.
Tools: spirit levelAbout 20 min
- STOP before anything behind a fixed panel, and note what each check showed — Everything past this line is measured rather than looked at, and measuring it safely needs the power off and a meter.
Before you go looking for the source
Safety
Unplug the appliance or switch off its breaker before removing any panel or putting a hand near a fan — a capacitor can hold a charge after the power is off, and a fan stopped by an open door will restart without warning.
When to call a technician
Call when the noise is behind a sealed panel, or when it is a hard knock at the instant the compressor starts.
Nearest pages of this class
What this page does not cover
This page is written for the Moffat freezer as a class, not for one family or one model line. Where a family- or model-specific page exists for your unit, that page is the more specific answer and the one to read first. Deliberately not here: part numbers, wiring colours and disassembly order, which differ by family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
