Refrigerator Making Noise: Identify the Sound First

Start With These Quick Checks

1. Describe the sound in one word. Buzz, click, rattle, hum, gurgle, grind. That word does most of the diagnostic work.
2. Work out where it comes from. Inside the freezer, from the back, from underneath, or from the top of the cabinet.
3. Note the rhythm. Constant, every few seconds, every few hours, or only when you use the dispenser.
4. Check whether the ice maker has a water supply. An ice maker switched on without water connected makes the fill valve buzz on every attempt.
5. Take everything off the top of the refrigerator. Items resting up there vibrate in sympathy and are routinely blamed on the compressor.
6. Check a drain/drip pan only if it is user-accessible on your model. A loose pan or nearby tubing can rattle, but many newer designs do not expose the pan for routine access.
7. Make sure the unit is level and not touching the cabinets. A refrigerator in light contact with a side panel transmits every vibration into the kitchen.

Unplug the refrigerator before reaching underneath or behind the rear panel. The condenser fan restarts without warning whenever the compressor does.

Most Likely Causes

Cause	What You May Notice	Difficulty
Ice maker with no water supply	A buzz lasting a few seconds, repeating every few hours	Easy
Items on top or against the sides	Rattle that changes when you touch the cabinet	Easy
Drip pan out of position	Rattle from underneath, worse when the compressor runs	Easy
Normal refrigerant and expansion sounds	Gurgling, popping, quiet hissing, no performance problem	Easy — not a fault
Fan hitting ice	Ticking or grinding from inside the freezer	Moderate
Debris in the condenser fan	Rattle or scrape from underneath, intermittent	Easy
Compressor start/overload circuit or compressor fault	Repeated clicks with poor cooling; compressor does not settle into a normal run	Technician recommended
Compressor, tubing or mounting vibration	New deep knock/drone or sudden sound change, especially with cooling changes	Technician recommended

1. Buzzing

One well-documented source of a short buzz is the water valve for the ice maker.

If the ice maker is switched on but has no water connected — common in a rented home, a new installation, or when someone shut the supply off — the control still calls for a fill on schedule. The valve energizes, no water arrives, and you hear a buzz for a few seconds. Then it repeats hours later. Whirlpool’s service guidance names this directly as a cause of buzzing and clicking.

What you may notice: the sound repeats on a long, regular interval, the ice bin stays empty, and nothing about the cooling is wrong.

How to check: switch the ice maker off using the control described in the owner’s manual. If the periodic buzzing stops, the fill attempt was the source.

What it means: connect the water supply if you want ice, or leave the ice maker switched off. Either way nothing is broken.

2. Clicking

Repeated clicking together with a refrigerator that is no longer cooling deserves attention. The sound can come from the compressor start/overload circuit cycling because the compressor does not start normally; the start device is one possibility, but a compressor or supply fault can create a similar pattern.

What you may notice: a click roughly every few seconds to a minute, a compressor that never settles into its usual hum, and temperatures rising.

What it means: call a technician rather than ordering a relay from the sound alone. The start device, compressor and electrical supply can overlap in symptoms, and repeated failed starts are not something to ignore.

Clicking a few times a day, with normal cooling, is a different thing entirely. Defrost controls, dampers and valves all click as they operate.

3. Rattling

What you may notice: a rattle that stops when you put a hand on the cabinet, or when you take something off the top.

How to check: clear the top of the refrigerator completely. Check the gap on each side — a cabinet in light contact turns the whole kitchen unit into a sounding board. Then look underneath at the drip pan, which collects defrost water and sits in a bracket it can work loose from.

What it means: these are easy external checks before assuming the rattle comes from the compressor or another internal part.

4. Gurgling, Popping and Hissing

What you may notice: a gurgle like water moving through pipes, occasional popping or cracking from inside, and sometimes a soft hiss after the compressor stops.

What it means: these sounds can be normal when temperatures and performance are normal. Whirlpool lists gurgling from refrigerant flow, popping/cracking from expansion and contraction, and hissing/sizzling associated with normal cooling or defrost operation. A new refrigerator may sound different from the one it replaced, so judge a sound together with cooling performance and whether it is new or worsening.

5. Ticking or Grinding Inside the Freezer

What you may notice: a regular sound from inside the freezer that may change or stop when the door opens. Many models pause the evaporator fan when the door opens, but not every design behaves the same way.

How to check: if your model has an obvious user-accessible door switch, hold it in and listen after a short delay. A fan blade contacting frost or debris can tick or grind rhythmically. If the switch is hidden or magnetic, use the owner’s manual rather than trying to bypass it.

What it means: the noise is secondary. The next question is why frost or debris is reaching the fan. Repeated ice can come from a defrost fault, door/air leak or another model-specific airflow problem. See frost buildup and a fan that is not running.

6. A Loud Hum or Drone From the Back

What you may notice: a hum that is louder than it used to be, continuous, and coming from the machine compartment.

How to check: unplug the unit. If the condenser area is user-accessible on your model, look for visible debris around the fan and clean the condenser only as the owner’s manual directs. Some models use condenser designs that are not intended for routine user cleaning.

What it means: if the sound is accompanied by poor cooling and long run times, read a refrigerator that runs constantly, because the same airflow problem causes both.

What Your Symptoms Mean

• Buzz for a few seconds, every few hours, no ice being made.→The ice maker valve with no water supply.
• Repeated click and the refrigerator is warming up.→The compressor start/overload circuit or compressor needs diagnosis. Call for service.
• Occasional clicks with normal cooling.→They can come from normal controls, dampers, valves or ice-maker operation; use the timing/location rather than treating every click as a fault.
• Rattle that stops when you touch the cabinet.→Items on top, or contact with a cabinet side.
• Rattle from underneath.→Check user-accessible pans/tubing and visible debris around a serviceable condenser-fan area; internal causes need service.
• Gurgling, popping, a soft hiss.→Normal operation.
• Ticking from inside the freezer that changes with fan operation.→Check for fan contact with frost or debris.
• A new deep knock from the machine compartment, especially with cooling changes.→Compressor or mounting/line vibration is possible; get a professional opinion.

When to Call a Technician

Do yourself: switching off an unconnected ice maker, clearing the top of the cabinet, checking a user-accessible drain pan, cleaning a user-serviceable condenser area as the manual directs, and checking that the refrigerator is level and not touching surrounding cabinets.

Call a qualified technician for clicking that comes with a loss of cooling, for ice forming where the fan runs, and for any new deep knocking from the compressor.

Most of this list is noise rather than failure. The one sound worth acting on quickly is clicking combined with a refrigerator that is no longer cold.