Refrigerators are the appliance we service most — 7,304 completed jobs, 34% of everything we do. A large share of those calls start with a sound, and a large share of those sounds turn out to be perfectly normal.
Sounds that are normal
Modern refrigerators are busier than the ones people grew up with. Several of these are new to anyone replacing a twenty-year-old unit.
- A low steady hum. The compressor running. It should be constant and unremarkable.
- Gurgling or trickling. Refrigerant moving through the lines, or defrost meltwater running to the drain pan. Usually loudest just after a defrost cycle.
- Popping and creaking. Plastic liners expanding and contracting as the cabinet changes temperature. Most noticeable at night when the house is quiet.
- A short whoosh when you close the door. Air pressure equalising.
- Clicking every few hours. The defrost timer switching over.
- A brief buzz when the ice maker fills. The water valve opening.
If the sound is intermittent, brief, and the refrigerator is holding temperature, it is almost certainly in this group.
Sounds that mean something is wearing out
Rattling or vibration that builds
Often the condenser fan at the back, with a blade catching on debris or a bearing starting to go. Sometimes it is simply the drain pan sitting loose. Worth checking, cheap to fix, and it gets worse.
A squeal or chirp from inside the freezer
The evaporator fan. It sits behind the rear panel of the freezer and moves cold air forward into the fridge compartment. A failing one squeals before it stops, and when it stops the freezer stays cold while the fridge slowly warms.
Loud buzzing from the back, in bursts
Often the compressor start relay. It buzzes, tries, fails, and tries again. A relay is an inexpensive part; ignoring it puts strain on the compressor, which is not.
Knocking or banging on start-up
The compressor mounts. Rubber isolators harden with age and the compressor thumps against the frame each time it starts.
Sounds that mean stop and call
Two are worth acting on the same day:
- A repeated click every two to five minutes with no hum following it. The compressor is trying to start and failing. Left running, it can overheat.
- A scraping or grinding metal sound from the freezer. Usually the evaporator fan blade hitting ice. Continuing to run it damages the fan and the coil.
Locating the sound
This is the most useful thing you can do before calling, and it takes two minutes:
- Open the freezer while it is running. If the sound gets noticeably louder, it is the evaporator fan.
- Listen at the back. Louder there means condenser fan or compressor.
- Press a hand gently on the cabinet side. If the sound changes, it is vibration transferring through the frame — often just a levelling issue.
- Note when it happens. Constant, only on start-up, or only after a few hours? That timing tells us a great deal.
Sound plus a second symptom
A noise on its own is usually minor. A noise combined with something else rarely is:
- Noise and the fridge warming — evaporator fan or defrost
- Noise and the compressor running constantly — condenser fan or blocked coils
- Noise and water inside — blocked defrost drain plus a fan hitting ice
- Noise and a warm exterior at the back — heat not being rejected
Common questions
My new refrigerator is louder than my old one. Is it faulty?
Probably not. Newer units run their fans more of the time to hold tighter temperatures, and many now have a second fan. Give it a week before judging.
The noise stops when I open the door. What does that mean?
Opening the door usually cuts the evaporator fan. If the sound stops with it, you have found the fan.
Is a noisy fridge using more electricity?
If the noise comes with constant running, yes — and that is the real cost. A fan that never switches off is both the symptom and the expense.
Can I just live with it?
With a creak or a gurgle, yes. With a squeal or a repeated failed start, no — those are parts announcing they are near the end, and the second one can take the compressor with it.
Book a visit or call (832) 615-1079 and we will tell you what the fault is before any part is ordered.