Dishwasher Buying Guide: Features That Actually Matter (According to a Repair Technician)
- Expo Appliance
- 1 day ago
- 4 min read
When it’s time to replace a dishwasher, most people start by looking at price, appearance, or flashy features. But as appliance repair technicians, we see what happens after the dishwasher has been used for a few years. Some designs hold up well and clean dishes reliably. Others look impressive in a showroom but tend to cause problems later.
If you’re shopping for a dishwasher, here are the features that actually matter—and a few that may be more trouble than they’re worth.
Stainless Steel Tubs vs. Plastic Tubs
One of the first things to look at when comparing dishwashers is the interior tub material.
Stainless steel tubs
Quieter during operation
More resistant to stains and odors
Handle high water temperatures better
Often found in mid- to high-end machines
Plastic tubs
Usually found in lower-cost dishwashers
Slightly louder because plastic doesn’t absorb sound as well
Can discolor over time
Still perfectly functional, but generally not as durable
From a technician’s perspective, stainless steel tubs are usually worth the upgrade if the price difference isn’t too large.
Base Pans and Leak Protection
Some dishwashers include a base pan or leak protection system underneath the machine.
If a leak occurs, water collects in the pan and triggers a sensor that shuts the dishwasher off. This helps prevent water from reaching your floor or cabinets.
Not every dishwasher includes this feature, but it can be valuable—especially in homes with hardwood floors or kitchens where a leak could cause expensive damage.
Hidden Heating Systems vs. Exposed Heating Elements
Older dishwashers typically had an exposed calrod heating element at the bottom of the tub (similar to what you might see in an oven).
Modern dishwashers often hide the heating system underneath the tub.
Exposed heating elements
Dry plastic items better
Simpler design
Can sometimes warp plastic items if they fall onto the element
Hidden heaters
Allow higher wash temperatures
Improve energy efficiency
Often paired with condensation drying systems
Plastic dishes may not dry completely
Many European-style machines use hidden heaters and condensation drying, which saves energy and cleans dishes very well. However, plastic items may still be wet at the end of the cycle. A simple trick is to crack the door open after the cycle finishes, which lets the steam escape and helps dishes dry faster.
The Third Rack: One of the Best Modern Improvements
One feature we actually like a lot is the third rack silverware tray.
Instead of crowding utensils into a small basket, the third rack spreads them out flat so water can reach all surfaces.
Benefits include:
Silverware gets cleaner
More space on the lower rack
Less utensil nesting (spoons stacked together)
This is one modern upgrade that genuinely improves performance rather than just adding complexity.
Dishwashers With Filters vs. Old Grinder Designs
Older dishwashers often used food grinders to break down debris.
Most modern machines use removable filters instead.
While this design is quieter and more energy efficient, it does require basic maintenance.
We frequently get service calls for dishwashers that “aren’t cleaning well,” only to find the filter completely clogged with food debris.
A good rule of thumb:
Remove and rinse the filter about once a month.
It takes less than a minute and can prevent many performance issues.
Ultra Quiet Dishwashers: What to Know
Manufacturers often advertise extremely quiet dishwashers with sound ratings in the 38–42 dBA range.
While quiet operation is great, it can sometimes come with trade-offs depending on the design:
Smaller pumps
Longer wash cycles
Lower wash pressure
Some higher-end models manage to stay quiet while still cleaning very well. In fact, some are so quiet that you can barely tell they are running.
But in general, if a dishwasher is extremely quiet, expect the cycle times to be longer.
Novelty Features That Can Cause Problems
Many modern dishwashers include flashy marketing features that look impressive but add unnecessary complexity.
Examples include things like “water wall” spray systems or moving spray bars that replace traditional rotating arms.
From a repair standpoint, these types of designs introduce:
Extra motors
More moving parts
Higher failure potential
Traditional rotating spray arms have been used for decades because they are simple and reliable. When manufacturers reinvent that system, it doesn’t always improve performance—and sometimes it creates new problems.
Features I Tend to Avoid as a Technician
While shopping for a dishwasher, I would be cautious about designs that add complexity without clear benefits.
These can include:
Moving spray wall systems
Excessively complicated touch controls
Automatic door-opening mechanisms
Overly complex spray tower systems
In many cases, simpler designs last longer and are easier to service.
One Brand That Consistently Stands Out
While many manufacturers produce good dishwashers, one brand that consistently performs well in both cleaning and reliability is Bosch.
Their machines use stainless steel tubs, excellent filtration systems, and condensation drying that allows very high wash temperatures. Higher-end models are also incredibly quiet.
No dishwasher is perfect, but from a technician’s perspective they tend to be very well engineered.
The Bottom Line
When shopping for a dishwasher, focus on features that improve reliability and cleaning performance, not just flashy marketing.
The features that matter most include:
Stainless steel tubs
Good filtration systems (with regular cleaning)
Well-designed spray arms
Optional third rack for utensils
Solid leak protection
A dishwasher doesn’t need a long list of gimmicks to do its job well. In many cases, simpler designs with proven technology perform the best over time.
Need Dishwasher Repair or Advice?
If your dishwasher isn’t cleaning properly or you’re trying to decide whether to repair or replace it, the technicians at Expo Appliance are happy to help.
We provide professional appliance repair throughout the Midlands of South Carolina and can help you get the most life out of your appliances.
Call 803-710-3976 or visit www.expoappliance.com to schedule service.
