Garbage Disposal Repair & Replacement in the Portland Area
Knapp's works on residential garbage disposals in the Portland ZIP codes we cover — including humming units, jams, leaks, and full replacement when repair isn't practical. A stuck or leaking disposal often affects the dishwasher too, so it's worth addressing both at once when appropriate.
See if your address is in an approved service area.
Enter a five-digit U.S. ZIP code. We verify against our service area as you type.
Common Problems We See
- Disposal hums but doesn't spin
- Leaking under the sink from the top, middle, or bottom of the unit
- Grinding or metallic noise that wasn't there before
- Disposal will not turn on at all
- Slow drain or water backing up into the second sink
- Foul odor coming from the disposal
- Dishwasher not draining because of a disposal-side clog
Safe Checks Before Calling
A few quick checks are worth doing before requesting service — sometimes they resolve the issue, and either way they help us diagnose faster.
- Never put your hand into the disposal, even when it's off
- Try the reset button on the bottom of the unit
- Check the wall switch and the breaker
- Run cold water while briefly testing to see if the motor engages
- Note where the leak appears — the location matters for repair versus replacement
Do not attempt to free a jammed disposal with your hand under any circumstance. If you smell smoke or notice a burning odor, shut off the breaker and request service.
How We Diagnose
Disposal diagnosis includes verifying power, evaluating whether the motor is seized or the flywheel is jammed, checking connections to the sink flange and dishwasher, and identifying leak locations that determine repair versus replacement.
Repair or Replace?
Many disposal failures are best addressed with replacement, especially when leaking from the body of the unit. Jams and simple electrical issues can sometimes be corrected without replacement. We'll recommend what actually makes sense for your setup.
Brands We Commonly Service for Garbage Disposal
Brand and model coverage varies by appliance type, age, parts availability, installation, and service requirements. Please provide the brand and model number when submitting a service request so eligibility can be confirmed.
- GE
- KitchenAid
- Whirlpool
Frequently Asked Questions
- Can a leaking disposal be repaired?
- Leaks from the top mounting area or a hose connection can often be corrected. Leaks from the body of the unit almost always mean replacement.
- Do you replace old disposals?
- Yes — replacement of qualifying residential disposals is a common service. Please share the current model and any preferences when requesting service.
- Why won't my dishwasher drain?
- One of the most common causes is a clog at the disposal inlet or a knockout plug that was never removed during original installation.
Related Services
Dishwasher Repair
Knapp's diagnoses and repairs residential dishwashers, including built-in and integrated models, across the Portland-area ZIP codes we serve.
Appliance Installation
Knapp's installs qualifying residential appliances in the Portland ZIP codes we cover — including replacement of existing units and installation of new appliances into prepared locations.
Serving Portland & Surrounding Oregon Communities
Knapp's accepts service requests throughout the street-delivery area of every ZIP code listed on our Service Areas page. An approved ZIP confirms geographic eligibility; final service eligibility also depends on the appliance, brand, model, job scope, access, and scheduling availability.
Tell Us What Your Appliance Is Doing
Provide the appliance type, brand, model number, symptoms, service address, ZIP code, and preferred dates. Knapp's will review the request and contact you regarding service eligibility and scheduling.
Submitting a service request does not confirm an appointment. Knapp's will review the information provided and contact you regarding service eligibility and scheduling. For confirmed service visits, Knapp's calls the evening before to provide a two-hour arrival window.