What the Sound Is Telling You
Most appliance noise comes from a small number of moving parts: fans, compressors, motors and valves. The type of sound and where it comes from narrows it quickly. A worn fan bearing hums or squeals, a failing compressor knocks or buzzes, a stuck valve clicks or thumps, and loose hardware rattles.
Common Sounds and What We Check
| Sound | Likely Cause | What a Technician Checks |
|---|---|---|
| Loud hum or buzz | Fan bearing or compressor load | Fans, condenser, compressor draw |
| Squeal or grind | Evaporator or convection fan motor | Fan motor and blade |
| Repeated clicking (range) | Spark igniter cycling | Igniter, burner cap, valve |
| Knock or thump | Compressor or water valve | Compressor mounts, valve |
| Rattle | Loose part or fan blade | Hardware and fan clearance |
Notes by Brand
Sub-Zero: A rising hum on a built-in is frequently a condenser fan with a tired bearing; catching it early prevents a warm-fridge call later. Symptom-based diagnosis.
Wolf: A screech when the oven runs is usually the convection fan motor bearing, an OEM-part fix.
Miele and Bosch: A grinding dishwasher points to the wash or drain pump; these lines may also post a code alongside the noise.
Viking and Thermador: Clicking that will not stop on a range is the spark module cycling on a burner that is not catching.
Not All Noise Is a Fault
A brief click during defrost, a gurgle of refrigerant, or a fan speeding up are normal. A new, constant, or grinding sound is the one worth investigating.
When to Book a Repair
A grinding fan or a knocking compressor should be diagnosed before it fails and takes cooling with it. Book a refrigerator or range repair and we will locate the source.
Hearing Something New?
Book a visit. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.