why is my thermostat making a constant faint buzzing or humming noise? it's coming from the wall plate

DIAGNOSIS A constant faint buzzing or humming from your Amazon Smart Thermostat is almost always caused by one of two things: the relay inside the thermostat vibrating when energizing your HVAC system, or a wiring compatibility issue that allows a...

panasonic inverter microwave making a loud buzzing or humming noise when it runs, is it broken?

DIAGNOSIS The loud buzzing or humming noise in the Panasonic NN-SD975S is typically caused by the Inverter board and the high-voltage transformer. Unlike traditional microwaves that use a heavy, bulky transformer to provide a constant stream of po...

why is my nest making a loud clicking sound every few minutes? it's coming from the unit itself.

DIAGNOSIS The loud, rhythmic clicking sound emanating from your Google Nest Learning Thermostat 3rd Generation is the physical engagement and disengagement of the internal relays. These relays act as electronic switches that close a circuit to sen...

my ryobi reciprocating saw is making a really loud grinding noise when i pull the trigger, sounds awful

DIAGNOSIS The loud, metallic grinding noise occurring immediately upon trigger pull on the Ryobi P519 is typically caused by the failure of the pinion gear or the drive gear assembly. In this specific reciprocating saw model, the motor rotates a s...

i get an 'E-2' error code when i try to use the microwave or any cooking function, it just beeps at me.

DIAGNOSIS The E-2 error code on the Samsung MC11A7033CT indicates a failure in the door interlock system. Specifically, the control board is not receiving the required signal from the door switches to confirm that the unit is safely sealed. This i...

makita xfd131 drill making a weird clicking noise when i pull the trigger, not drilling. battery's charged.

DIAGNOSIS The clicking noise you are hearing in your Makita XFD131 is typically the sound of the trigger switch engaging the motor, but the mechanical transmission failing to transfer that rotation to the chuck. This is most often caused by a "hal...

just installed my pd600 and it's making a loud humming or vibrating noise from under the sink, sounds like a bad pump.

DIAGNOSIS The loud humming or vibrating sound you are hearing in your Frizzlife PD600-TAM3 is rarely a mechanical failure of the pump itself. Instead, this is typically a phenomenon known as "water hammer" or resonance vibration. Because the PD600...

nest wifi pro is making a faint high-pitched buzzing or coil whine noise, is that normal?

DIAGNOSIS The high-pitched buzzing or "squealing" sound emanating from the Google Nest WiFi Pro 6E is a phenomenon known as coil whine. This occurs due to electromagnetically induced vibrations in the inductors (coils) within the internal power ci...

why does my epson ecotank make a loud grinding noise every time it starts a print or copies something?

DIAGNOSIS The loud grinding or "crunching" noise occurring during the initialization phase of the Epson EcoTank ET-2800 is a mechanical failure known as a carriage jam. This happens when the printhead carriage—the assembly that holds the ink noz...

my induction cooktop makes a high-pitched humming or buzzing noise, is it broken?

DIAGNOSIS In the vast majority of cases, a high-pitched hum, buzz, or whine coming from your LG LREL6323S is not a sign of mechanical failure, but a physical phenomenon known as "magnetic resonance." Induction cooking works by passing a high-frequ...

my milwaukee hammer drill makes a horrible grinding noise only when i push the hammer mode button, drilling is fine

DIAGNOSIS The grinding noise occurring exclusively in hammer mode on the Milwaukee M18 FUEL 2904-20 indicates a failure within the percussion assembly, specifically where the drive gear interfaces with the hammer ram and the anvil. In standard dri...

it printed fine for a week and now it won't feed the label, just makes a grinding noise and the paper light is red

DIAGNOSIS The grinding noise combined with a red "Paper" indicator on the JADENS Bluetooth Thermal Printer typically signifies a mechanical jam or a failure in the label detection sequence. When the printer attempts to feed a label, the stepper mo...

my canon g3270 is making a loud grinding noise when it prints, like it's chewing on the paper.

DIAGNOSIS The loud grinding or "chewing" noise in the Canon MegaTank G3270 is typically caused by a mechanical obstruction in the paper feed rollers or a misalignment of the carriage rail. When the printer attempts to pull a sheet of paper, the pi...

my razor e300 makes a high-pitched whining noise when it runs, gets louder when i go faster.

DIAGNOSIS The high-pitched whining noise emanating from your Razor E300 is primarily caused by the interaction between the brushed DC motor's internal components and the electrical frequency of the power delivery. Specifically, the E300 uses a per...

my black decker mini fridge is making a loud gurgling or bubbling noise, like water running. is that normal?

DIAGNOSIS The gurgling, bubbling, or "water running" sound you are hearing in your BLACK+DECKER BCRK25V is the result of the refrigerant (cooling agent) transitioning between liquid and gas states as it circulates through the evaporator and conden...

Making Strange Noises

Strange noises from appliances are almost always diagnostic — the type of sound tells you what's wrong. A grinding noise means something mechanical is failing or obstructed. Buzzing or humming usually points to electrical components. Clicking can be a relay trying to engage or a stuck mechanism. Rattling typically means something is loose or a foreign object is inside.

100 troubleshooting answers across 19 product categories