Your appliances communicate through sounds. Learning to distinguish normal operating sounds from warning signs helps you catch problems early and avoid unnecessary worry about normal operation.
Refrigerator Sounds
Normal Sounds
Compressor hum:
- Low, steady hum when running
- Cycles on and off (not continuous)
- May be slightly louder when first starting
Water flow:
- Gurgling as refrigerant circulates
- Dripping after defrost cycle
- Water filling ice maker
Fan operation:
- Soft whirring from condenser fan
- Evaporator fan in freezer
- May increase when door opens
Concerning Sounds
Clicking:
- Repeated clicking (relay issue)
- Click then silence (compressor problem)
- Clicking with no cooling (urgent)
Grinding:
- From fan area (fan motor/blade issue)
- From compressor (serious problem)
- Metal on metal sound (immediate attention)
Loud buzzing:
- Louder than normal (compressor strain)
- New buzzing sound (investigate)
- Buzzing with no cooling (problem)
Dishwasher Sounds
Normal Sounds
Water filling:
- Hissing as water enters
- Brief at start of cycle
- May repeat between cycles
Spray arms:
- Whooshing water spray
- Rhythmic swishing
- May vary with pressure
Drain pump:
- Humming during drain
- Brief at cycle end
- Water draining sound
Concerning Sounds
Grinding:
- Check for debris in pump
- May indicate motor issue
- Foreign object possible
Banging:
- Spray arm obstruction
- Item fell through rack
- Pump issue
Continuous humming:
- Pump running but not draining
- Motor failing
- Blockage in system
Range/Oven Sounds
Normal Sounds
Gas igniter clicking:
- Click-click-click until ignition
- Brief at start
- Should stop once lit
Oven heating:
- Ticking as metal expands
- Occasional pops (expansion)
- Fan in convection mode
Gas burning:
- Soft whoosh of flame
- Consistent sound level
- Variation with setting
Concerning Sounds
Continuous clicking:
- Even when burner is lit (needs service)
- After turn-off (moisture or debris)
Popping with flame:
- Flame lifting from burner
- Possible gas pressure issue
- Needs professional attention
Loud boom at ignition:
- Delayed ignition
- Gas buildup before lighting
- Serious—needs immediate service
HVAC Sounds
Normal Sounds
Air flow:
- Soft whoosh through vents
- Consistent during operation
- May vary with fan speed
Furnace ignition:
- Click of igniter
- Soft whoosh of burner
- Fan starting up
Outdoor unit:
- Compressor hum
- Fan operation
- Cycling on and off
Concerning Sounds
Squealing:
- Belt issues
- Motor bearing problems
- Fan motor failing
Banging:
- Loose component
- Ductwork issue
- Compressor problem
Rattling:
- Loose panels
- Debris in unit
- Ductwork disconnection
When to Act
Monitor These
- New sounds that weren't there before
- Sounds that are getting louder
- Intermittent unusual sounds
- Sounds accompanied by performance issues
Call Immediately For
- Grinding from compressors
- Burning smells with sound
- Loud banging
- Hissing (gas leak)
- Any sound with safety concern
Sound Diagnosis Tips
To identify the sound:
1. Note when it occurs (start-up, during operation, shut-down)
2. Locate where it's coming from
3. Describe it (clicking, grinding, humming, etc.)
4. Note frequency and duration
5. Record if possible
This information helps our technicians diagnose issues more quickly.
Your appliances shouldn't be making concerning sounds. If something doesn't seem right, trust your instincts and give us a call.