Commercial dishwashers run far more cycles than a home machine and rely on booster heaters, chemical pumps and wash tanks that home models do not have. Below are commercial-capable companies within reach of Knoxville, plus nearby appliance repair companies you can ask about restaurant equipment.
Restaurant Dish Machine Technicians, Knoxville TN
39 repair companies serve Knoxville from within 30 miles. 21 list an address in Knoxville, and the rest are spread across Maryville (3), Lenoir City (3), and Sevierville (3). Nearest on the list: Doctor Appliance, around 1.1 miles out. 1 of them mentions commercial or restaurant equipment work in their listing or website. Rated companies nearby average 4.4 stars across 37 businesses.
Listings come from public business data. A brand or service mention means the company names it in its listing or website; it is not a certification. Verify experience, licensing and insurance before hiring.
| Repair companies inside 30 miles | 39 |
|---|---|
| Mention dishwasher work | 0 |
| Listing Saturday hours | 20 |
| With 4.5+ stars and at least 10 reviews | 19 |
| Mention commercial or restaurant work | 1 |
| Three nearest companies, miles away | 1.1, 1.4, 1.5 |
At the top of the Knoxville list: Fesco (1.4 miles away, 3.9 stars from 80 reviews); Mr. Appliance of Knoxville (7.8 miles away, 4.6 stars from 1,973 reviews); ProTech Appliance Repair, Inc. (2.2 miles away, 4.9 stars from 270 reviews, lists Saturday hours); Pipe Wrench Plumbing, Heating & Cooling (14.7 miles away, based in Maryville, 4.9 stars from 460 reviews, lists Saturday hours).
How Restaurant Dish Machine Repairs Differ
When to Call About a Commercial Dishwasher
- Water not filling or draining from the tank
- Machine trips the breaker or will not power on
- Machine will not reach final-rinse temperature
- Chemical pumps not priming or dispensing
Ask any company you call which commercial brands and machine types it services, such as undercounter, door-type or conveyor units.
Before Anyone Touches the Dishwasher
Hand soap, dish soap or laundry detergent can make a dishwasher over-suds and spill water onto the floor; use only automatic dishwasher detergent. Source: Whirlpool - How to Fix a Leaking Dishwasher
A dishwasher must be grounded; if the home wiring lacks a ground or the plug does not fit the outlet, a licensed electrician should correct it rather than modifying the plug. Source: Whirlpool - Dishwasher User Instructions
More: where dishwasher leaks come from.
What Dishwasher Repairs Cost
Published ranges for dishwasher repairs, for reference when a Knoxville company quotes commercial work:
- Water inlet valve replacement: $80–$125 Source: HomeAdvisor - How Much Does Dishwasher Repair Cost?
- Leak repair (including leaking door): $50–$300 Source: HomeAdvisor - How Much Does Dishwasher Repair Cost?
- Drain pump replacement: $150–$400 Source: Fixr - How much does it cost to repair a dishwasher?
- Motor repair: $200–$500 Source: Fixr - How much does it cost to repair a dishwasher?
- Common dishwasher repair: $100–$300 Source: Fixr - How much does it cost to repair a dishwasher?
- Service call fee (often credited toward the repair if you go ahead): $35–$100 per visit Source: Fixr - How much does it cost to repair a dishwasher?
Once a dishwasher is around 10 years old, replacement generally makes more sense than repair. Source: Fixr - How much does it cost to repair a dishwasher?
Ranges are published estimates, not quotes. See the dishwasher repair cost guide and how long dishwashers last.
Local Notes for Knoxville
Knoxville Utilities Board (KUB), which supplies Knoxville, reports hardness of averages about 94 ppm (mg/L), moderately hard. Hard water leaves spots and film on glasses and builds up on dishwasher spray arms and inlet screens, which is worth mentioning when you book a repair. Source: KUB 2025 Water Quality Report
Tennessee's Board for Licensing Contractors does not list an appliance repair license among the licenses it issues (general contractor, home improvement, limited licensed electrician and limited licensed plumber). Source: TN Board for Licensing Contractors
In Tennessee, you can check a license with the Tennessee Department of Commerce and Insurance: Verify a License or report a problem to the Tennessee Division of Consumer Affairs (Office of the Attorney General).
How to Choose a Dishwasher Technician Near Knoxville
- Will you check the filter, drain hose and disposal connection before replacing the pump?
- Can you give a written estimate before ordering parts?
- Do you also handle the water supply and drain connections, or should I call a plumber for those?
Commercial Dishwasher Repair FAQs: Knoxville, TN
Who fixes the chemical dispensers on a dish machine?
Do home appliance repair companies fix commercial dishwashers?
How fast can a commercial dishwasher be repaired?
Related Repair Pages for Knoxville
Commercial Dishwasher Repair in Nearby Cities
List what the machine is doing (not filling, not reaching temperature, not draining, chemicals not dispensing) and whether a chemical supplier services the dispensers. For a Knoxville kitchen, that sorts out who to call first.