The short answer
A new rattle, buzz or knock from the PDR family is far more often about where the cabinet stands than about anything inside it, and the checks that prove that are free. Most refrigeration noise is not a fault, and the useful work on this page is separating the sounds a working cabinet makes from the two or three that mean something has moved or worn.
What you observe on these models
- A scraping or chirping that changes with the door open — Where a model has a fan behind a panel, ice or a stray wire touching the blade gives a sound that changes as soon as the airflow does.
- A deep hum that has got noticeably louder — A hum that has grown rather than appeared usually means the machine is running more, which is a cooling complaint wearing a noise costume.
- A gurgle or a bubbling sound after it stops — That is refrigerant settling, and it is normal on every cabinet of this kind. It is worth naming so nobody pays to have it investigated.
- NEAR MISS - the noise arrived with water on the floor — Noise plus water usually means something has shifted or a drain has blocked, and the water leak page for this family is the better starting point.
Causes, most likely first on this platform
- Tubing touching the cabinet — The pipework at the back is routed with deliberate clearance. Anything that pushes a line against the shell - a move, a shove into a tight space, a wall bracket - gives the compressor a direct path into a large flat panel, which is exactly what a loudspeaker is. Several distinct bases means several depths, and the deeper cabinet pushed into a tight space is the one whose pipework ends up resting on something.
- A fan fouling on ice or a wire — Second on this platform. On a model that has a fan, ice or a stray wire touching the blade is worth a look, though confirming it means a panel off, which is why it sits under the free checks.
- Levelling, feet and what the cabinet is touching — Third here. Levelling and contact stay on the list to the end, because they are free to rule out and because they explain sounds that appear after a move with nothing having failed at all.
- Mounts that have stopped absorbing anything — Fourth. Hardened mounts produce a knock at each end of the cycle and a general increase in transmitted noise. It is an age fault rather than a breakage, and it is rarely urgent.
- The one cause on this list that is not a nuisance — Last. Last, and the only entry here that is urgent: repeated clicking with no cooling means the compressor is not starting, and continuing to let it try is not free.
Check in this order, and why
- Wait for the compressor to stop, then listen — This one test splits the list in half. Whatever is still audible after the machine has gone quiet is not the machine, and whatever vanishes with it is being driven by it. The 3 entries below sit on 3 different bases, so confirm your own code before carrying a neighbour's result across.
- Press a hand flat on the top and the side — If the sound drops while you press, you are listening to a panel resonating rather than a part failing, and the fix is damping or clearance rather than parts.
- Take the loading out of the equation — Bottles touching each other and a loose shelf make noises that sound mechanical from the next room. Empty the shelves once before assuming anything about the machine.
Before you open anything
Safety
Power the machine down at the plug or the breaker before you go behind a panel, and give the capacitor a moment. Do not chip ice away from a fan blade with anything metal - the tubing behind it punctures easily - and do not defeat an interlock to keep something spinning while you look at it.
Models in the PDR family
Reference| Model number | Family key |
|---|---|
| PDR36L34G | avanti:refrigerator:pdr |
| PDR50L34G | avanti:refrigerator:pdr |
| PDR75L34G | avanti:refrigerator:pdr |
When to call a technician
Call when the free checks are clean and the noise is still there, because at that point it is behind a panel and behind a meter. Call without waiting if the sound is short bursts of clicking with no cooling between them, if a breaker trips when the machine starts, or if a burning smell has come with it - those are the three noises that get worse and more expensive the longer they run.
Other faults covered for these models
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
