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Appliance Surgeon Blog

Guide for Common Appliance Sounds

Published · Updated · By Elchin Hasanzade, Founder · Reviewed by Fuad, Tech Lead

Most appliance sounds are normal: refrigerators pop, gurgle and click, dishwashers hum while they drain, gas burners tick until they light, and heat pumps whoosh during a winter defrost. The sounds that deserve attention are new grinding, squealing, banging or loud buzzing, and any noise that comes with a burning smell, smoke, sparks or a gas odor means you should stop using the appliance now.

The normal sounds in the table below come from manufacturer support pages (Whirlpool, GE Appliances, Trane, Lennox and InSinkErator); the warning causes reflect general repair knowledge and are the usual suspects, not a diagnosis. Use it to sort "that's just the ice maker" from "turn it off and call someone."

Which appliance sounds are normal, and which are warnings?

Appliance Normal sounds Warning sounds What the warning usually means
Refrigerator Compressor and fan hum; clicks as controls switch; gurgling refrigerant; popping as the walls expand and contract; buzzing water valve while the ice maker fills; sizzling as defrost water hits the heater Clicking every few minutes with little or no cooling; grinding, chirping or squealing from the freezer or the back; buzzing about every 15 minutes with no ice Compressor start problem; failing evaporator or condenser fan motor, or ice hitting a fan blade; ice maker trying to fill with no water supply
Freezer Popping or cracking during cool-down or defrost; sizzling or hissing during defrost; steady hum Scraping or grinding from the fan area; compressor clicking on and off while the freezer warms Iced-over or failing fan; compressor start problem
Washer Lid lock clicking at the start; motor hum during wash and spin; drain pump hum that gets louder near the end of draining; a clunk as it shifts from agitate to spin Loud banging in spin; grinding or roaring that rises with spin speed; knocking or rattling Unbalanced load or unlevel washer; worn tub bearings or drive parts; coins or loose hoses
Dryer Gas valve clicking several times per cycle (gas models); light thumping for a few minutes after sitting unused; zippers and buttons tapping Thumping that never fades; squealing or squeaking; scraping; constant pounding Worn drum rollers, idler pulley or belt; a coin or pin caught at the drum seam; unlevel dryer
Dishwasher Rushing water on fill; swishing spray; drain pump hum; light clicking from the inlet valve; snap of the detergent door Grinding or loud rattling during wash or drain; humming with no water moving Glass, a bone or a pit in the pump area; stalled pump
Oven and range Burner igniter clicking until the flame lights and a soft whoosh as the oven burner catches (both can repeat every 1–3 minutes during a cycle); cooling fan running during and after cooking; convection fan cycling; ticking as metal heats and cools Surface igniters clicking when every burner is off; a loud pop, bang or boom when the oven burner lights; any gas odor Moisture or a faulty spark switch; delayed ignition, often a weak oven igniter; possible gas leak
Microwave Hum from the magnetron and fan; relay clicks, especially at lower power levels; vent fan noise on over-the-range models Sparks, crackling or popping flashes; loud buzzing or grinding; running with the door open Metal inside or damaged interior; electrical fault inside the unit
Furnace or heat pump Rush of air from the blower; clicks of the ignition sequence; heat pump defrost: a swoosh, the outdoor fan stopping and a cloud of steam for a few minutes Loud boom when the burners light; squealing or grinding from the blower; loud electrical buzzing; heat pump stuck in defrost or covered in ice Burners lighting late; blower motor or bearing wear; electrical fault; defrost problem
Garbage disposal Brief grinding while food goes through with the water running; motor whir Humming with no grinding; metallic clanking; silence after a hum Jammed flywheel; metal object inside; tripped overload protector

A few that surprise people

GE Appliances lists a loud bang from a refrigerator's water line (water hammer from high supply pressure) and a squeak from a tight new door gasket as normal. Whirlpool notes that thumping after a dryer sits unused comes from drum rollers that flattened and will round out again. Trane says the cloud of steam from an outdoor unit during defrost is melting ice and is normal.

Which appliance sounds mean stop using it now?

Stop the appliance and get help for any of these:

  1. A gas smell, with or without a hissing sound. Leave the area, leaving doors open if you can. Washington Gas says not to switch lights or appliances on or off or use a phone nearby, and to call 911 and its leak line at 844-WASHGAS (927-4427) from a safe place. Other utilities' customers should use their own emergency number.
  2. A burning smell, smoke or sparks. If it's safe, turn the appliance off and unplug it or switch off its breaker. If there is smoke or flame, get everyone out and call 911. Lennox says to turn a furnace off and call a professional if buzzing comes with a burning smell, flickering lights or a tripped breaker. An appliance that keeps tripping its breaker should stay unplugged until it has been checked.
  3. A loud bang or boom. From a furnace as the burners light, turn the heat off at the thermostat and have it inspected before using it again. From any appliance that then loses power, leave it off.
  4. Metal-on-metal grinding. Stop the washer or dryer cycle. For a disposal, InSinkErator says to switch it off and never put your hand inside; free a jam with the hex wrench in the bottom of the unit, remove objects with tongs or pliers, and press the red reset button underneath if it went silent.
  5. Microwave sparking that continues with nothing metal inside, or a microwave that runs with the door open. The FDA says to stop using a microwave that keeps operating with the door open and not to use one whose door is bent, warped or doesn't close firmly. The parts behind the cabinet run at dangerous high voltage; read why microwave repair is never DIY.

One more sound outranks all of these: a carbon monoxide alarm. The CPSC says to move outside to fresh air immediately and call 911 rather than looking for the source.

Dryer cabinet with the drum removed, showing the drum support rollers, the idler pulley and the drive motor
Dryer with the drum removed: the drum support rollers, idler pulley and drive motor are the usual sources of squealing and thumping.

What can you check yourself before calling?

Many noise complaints have simple causes. For washers, Whirlpool's guidance is to redistribute an unbalanced load, adjust the leveling feet, empty pockets and strap down hoses that knock against the cabinet. For dryers, check pockets for coins and pins and level the machine; loose sneakers will also make a dryer thump. For refrigerators, make sure nothing on top is vibrating and the cabinet isn't touching anything.

Unplug the appliance, or turn off its breaker or gas supply, before looking inside a panel. Refrigerant, gas connections, live wiring and microwave internals are technician work.

How do you describe a noise to a technician?

A good description often points to the failed part, so the right part can arrive on the first visit. Before you call, note:

  • When it happens: at start-up, during fill, wash, spin, drain or defrost, or right after the appliance shuts off
  • Where it comes from: front, back, bottom, inside the freezer or the outdoor unit
  • What it sounds like: click, hum, buzz, grind, squeal, thump or bang
  • What changed: new noise, louder noise, or noise plus poor cooling, heating or draining
  • The model number: usually on a label inside the door, on the frame or on the back

A short phone video of the noise also helps. If a refrigerator is clicking and not cooling, our post on compressor clicking explains the likely causes. For heating noises, see HVAC repair.

Example: Say a refrigerator starts chirping or squealing from the back of the freezer, a sound it didn't make last month, and the freezer is slowly warming. That combination points to a failing evaporator fan motor or ice touching the fan blade, not a normal sound. Noting when it happens and recording a short video helps the technician bring the right part.

If the noise turns out to be a worn part, Appliance Surgeon's $75 diagnostic visit is credited toward the repair when you approve the written quote. Our repair cost guide shows typical D.C.-area ranges so you know what to expect.

Sources

Related reading: DIY vs. Pro Repair: A Homeowner’s Guide to Fixing Appliances; Understanding Your Appliance Repair Warranty: What Does It Cover?; What’s Your Dishwasher Trying to Tell You? A Guide to Common Error Codes

Need a technician? We offer Appliance repair across D.C., Northern Virginia and Maryland — see appliance repair in Washington, DC, appliance repair in Alexandria, VA and appliance repair in Arlington, VA. The $75 diagnostic visit is credited toward the repair.

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Frequently asked questions

Common questions

Is it normal for my refrigerator to pop, gurgle and click?

Whirlpool and GE Appliances both list popping, gurgling and clicking as normal refrigerator sounds, caused by the cabinet walls and cooling coils expanding and contracting, refrigerant or defrost water moving through tubing, and relays or defrost timers switching. Pay attention to clicking every few minutes while the refrigerator warms up, or to grinding and squealing from a fan, since those point to a compressor start problem or a failing fan motor.

Why does my washer bang during the spin cycle?

Banging in spin is usually an unbalanced load or a washer that isn't level. Whirlpool recommends redistributing heavy and light items, adjusting the leveling feet and checking pockets for coins. A single clunk when the washer shifts from agitate to spin is normal. If banging continues with balanced loads, or you hear grinding that rises with spin speed, have the bearings and drive checked.

Why is my heat pump making a whooshing sound and steaming in winter?

That is almost always the defrost cycle. Trane explains that the heat pump reverses briefly to melt ice from the outdoor coil, which causes a swooshing sound, a pause of the outdoor fan and a cloud of steam for a few minutes. Call for service if the unit seems to defrost constantly or ice keeps building up on the coil.

Which appliance noises mean I should stop using it right away?

Stop the appliance for a gas smell, a burning smell, smoke or sparks, a loud bang or boom, metal-on-metal grinding, or a microwave that sparks with nothing metal inside. For a gas odor, leave first and call 911 and your gas utility from outside. If a carbon monoxide alarm sounds, the CPSC says to get to fresh air and call 911.

How much is a diagnostic visit with Appliance Surgeon?

The diagnostic visit is $75 for a single appliance or $115 for a double unit (such as a double wall oven, washer-dryer combo or stacked laundry). The fee is credited toward the repair if you approve the quote, and you get the price before any work begins.

Are Appliance Surgeon repairs covered by a warranty?

Every repair is covered by a 90-day warranty on parts and labor, starting the day the repair is finished. The technician explains the terms before the job is complete.

How do I book a repair with Appliance Surgeon?

Book online or call (771) 222-7117 with the appliance type, brand, model number and symptom. We are open Monday to Saturday 8 AM to 10 PM and Sunday 10 AM to 10 PM, with same-day and next-day visits when route windows are open, across Washington, DC, Northern Virginia and nearby Maryland.