Specialist Repair
Sub-Zero Dryer Knocking at Startup — Local Repair Near You
Your Sub-Zero Dryer is knocking at startup? Local technicians fix it fast — usually same day.
CA Licensed & InsuredSame-day available90-day parts warrantyAll Los Angeles home types served
(818) 718-9373Mon–Sat 7am–8pm · Sun 9am–5pm
Schedule Your Repair
1st Appointment
$15 OFF
off repair cost
Return Customer
$20 OFF
off repair cost
Veteran & Military
$20 OFF
off repair cost
Senior (65+)
$20 OFF
off repair cost
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Service Type
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Or call us directly:
(818) 718-937350,000+
Repairs Done
90-Day
Parts Warranty
Same Day
Availability
Brands We Service
Certified LA Repair Experts
Built for Los Angeles — Homes, Condos & More
ProFix Appliance Repair Los Angeles provides local repair near you for Sub-Zero Dryer appliances that are knocking at startup. A loud knock or thump occurs when the dryer first starts, before settling into normal operation. Our neighborhood technicians are factory-trained on Sub-Zero equipment and carry genuine OEM parts for a same-visit fix.
Colonial & Ranch
Los Angeles's most common homes — we service full-size appliances in Los Angeles County CA.
Condo / Townhouse
HOA-approved. Insurance certificates & board documentation on request.
Same-Day Service
Call before noon for today's slot across all Los Angeles zip codes.
All Major Brands
Samsung, LG, Sub-Zero, Miele, Viking & 40+ more.
Upfront Pricing
Flat-rate quotes before work starts — no surprise charges.
90-Day Warranty
Parts & labor guaranteed. We return at no charge if needed.
CA Licensed & Insured
State-licensed, fully bonded & insured
HOA & Board Ready
Insurance certificates on request
Flexible Scheduling
Mon–Sat 7am–8pm · Sun 9am–5pm
Upfront Fixed Pricing
No hidden fees — price locked before we start
How It Works
01
Book Online or Call
Schedule in 2 min or call (818) 718-9373
02
Tech Arrives
Usually same day in a 2-hr window
03
Diagnose & Quote
Upfront price — no work without approval
04
Fix & Test
Repair done, tested before we leave
Related Services
Not Heating
Drum Not Tumbling
Takes Too Long to Dry
Making Loud Noise
Won't Start
Dryer Overheating
Not Drying Clothes
Shutting Off Early
Not Getting Hot Enough
Taking Too Long to Dry
Thermal Fuse Blown
Heating Element Burned Out
Gas Igniter Not Working
Gas Valve Solenoid Failure
Flame Sensor / Radiant Sensor Failure
Blower Wheel Clogged with Lint
Exhaust Duct Clogged
Restricted Exhaust Airflow
Dryer Venting Improperly
Drive Belt Broken
Drum Rollers Worn Out
Drum Glide / Bearing Worn
Idler Pulley Seized
Drive Motor Failure
Making Loud Noise During Operation
Squealing Noise During Tumble
Thumping or Banging Noise
Rattling Noise
Control Board Failure
Cycling Thermostat Failure
High-Limit Thermostat Failure
Moisture Sensor Failure
Dryer Door Not Closing Properly
Door Switch Failure
Lint Trap / Screen Damaged
Start Button Not Working
Dryer Won't Turn On
Tripping Circuit Breaker
Burning Smell
Clothes Shrinking
Clothes Still Wet After Full Cycle
Clothes Damp but Warm After Cycle
Auto-Dry Sensor Not Working
Timer Not Advancing
Electric Dryer No Heat — Partial Power
Gas Smell from Gas Dryer
Display Panel Not Working
Buttons Not Responding
Won't Spin at All
Stops Mid-Cycle
Heat Setting Not Changing
Excessive Energy Use
Excessive Static on Clothes
Clothes Heavily Wrinkled
Steam Function Not Working
Moisture Sensor Needs Cleaning
Exhaust Hose Kinked
Exterior Too Hot to Touch
Wrinkle-Prevent Tumble Not Working
Requires Two or More Cycles to Dry
Error Code on Display
Low Gas Pressure to Dryer
Drum Interior Light Not Working
Door Handle Broken
Auto-Dry Cycle Runs All Night
Gas Burner Orifice Clogged
Lint Fire Hazard in Ductwork
Timer Advancing Too Slowly
Three-Prong Outlet / Four-Prong Cord Mismatch
Intermittent Squeaking
Bird or Pest Nest in Dryer Duct
Cycling Thermostat Stuck Closed
Gas Valve Solenoid Kit Needed
Thermal Cutout Needs Resetting
Available Now · Los Angeles, CA
Ready to schedule your repair?
ProFix Appliance Repair Los Angeles — trusted by thousands of Los Angeles homeowners. Same-day slots available.
Why Is Your Sub-Zero Dryer Knocking at Startup?
A loud knock or thump occurs when the dryer first starts, before settling into normal operation.
Common Causes
- 1Drum rollers with flat spots from sitting idle
- 2Drive belt slapping into position
- 3Heavy item at bottom of drum dropping as it starts to rotate
- 4Motor starting against load
- 5Loose drum baffle
How We Fix It
Our technician will identify whether the startup knock is from drum rollers, belt, or a loose internal component.
- Diagnostic included when we do the repair
- Genuine Sub-Zero OEM parts
- 90-day parts & 30-day labor warranty
Other Sub-Zero Dryer Issues
Not HeatingDrum Not TumblingTakes Too Long to DryMaking Loud NoiseWon't StartDryer OverheatingNot Drying ClothesShutting Off EarlyNot Getting Hot EnoughTaking Too Long to DryThermal Fuse BlownHeating Element Burned OutGas Igniter Not WorkingGas Valve Solenoid FailureFlame Sensor / Radiant Sensor FailureBlower Wheel Clogged with LintExhaust Duct CloggedRestricted Exhaust AirflowDryer Venting ImproperlyDrive Belt BrokenDrum Rollers Worn OutDrum Glide / Bearing WornIdler Pulley SeizedDrive Motor FailureMaking Loud Noise During OperationSquealing Noise During TumbleThumping or Banging NoiseRattling NoiseControl Board FailureCycling Thermostat FailureHigh-Limit Thermostat FailureMoisture Sensor FailureDryer Door Not Closing ProperlyDoor Switch FailureLint Trap / Screen DamagedStart Button Not WorkingDryer Won't Turn OnTripping Circuit BreakerBurning SmellClothes ShrinkingClothes Still Wet After Full CycleClothes Damp but Warm After CycleAuto-Dry Sensor Not WorkingTimer Not AdvancingElectric Dryer No Heat — Partial PowerGas Smell from Gas DryerDisplay Panel Not WorkingButtons Not RespondingWon't Spin at AllStops Mid-CycleHeat Setting Not ChangingExcessive Energy UseExcessive Static on ClothesClothes Heavily WrinkledSteam Function Not WorkingMoisture Sensor Needs CleaningExhaust Hose KinkedExterior Too Hot to TouchWrinkle-Prevent Tumble Not WorkingRequires Two or More Cycles to DryError Code on DisplayLow Gas Pressure to DryerDrum Interior Light Not WorkingDoor Handle BrokenAuto-Dry Cycle Runs All NightGas Burner Orifice CloggedLint Fire Hazard in DuctworkTimer Advancing Too SlowlyThree-Prong Outlet / Four-Prong Cord MismatchIntermittent SqueakingBird or Pest Nest in Dryer DuctCycling Thermostat Stuck ClosedGas Valve Solenoid Kit NeededThermal Cutout Needs Resetting
Still have questions?
Our LA team is ready — same-day service across Los Angeles County.