CMA L-1X
Commercial dishwasher not draining
Possible drain valve, drain motor or control issue — confirmed after inspection.
Example scenario
Russ — Technical Master
Engineering-Level Repair for High-End Appliances & Commercial Equipment
Advanced diagnostics for Sub-Zero, Wolf, Miele, Thermador, Viking, commercial dishwashers, HVAC, refrigeration, electrical and smart control systems in San Jose, Los Gatos, Saratoga and the Bay Area.
Get started
Fast Booking & Direct Contact
Three ways to reach KONGRA. Pick whichever is fastest for you.
Call KONGRA
Call for high-end appliance, commercial equipment, HVAC and complex diagnostic service.
Premium brands
High-End Brands We Service
Choose your appliance or equipment brand and schedule service online.
Why KONGRA
A technical master, not a parts swapper
Most repair calls fail because the technician treats a symptom instead of the system. KONGRA was built around one principle — diagnose properly, then fix it right the first time.
Engineering mindset
Mechanical engineering plus IT background — we read schematics, decode error logs and trace faults to root cause, not symptoms.
Advanced diagnostics
Multimeters, manometers, refrigerant analyzers, oscilloscopes and OEM service tools. We measure before we replace.
High-end equipment only
We specialize in luxury and commercial systems where generic technicians give up.
Commercial-grade response
Restaurants, hotels and property portfolios get prioritized downtime response.
In the field
Board-level diagnostics on a Sub-Zero control module.
Services
Book AppointmentFull-system coverage
High-End Appliance Repair
Engineering-level diagnostics across every luxury brand.
Learn moreSub-Zero Refrigerator Repair
Sealed system, electronics, compressor and integrated unit work.
Learn moreWolf Range & Oven Repair
Burner, ignition, control board and convection diagnostics.
Learn moreMiele Dishwasher & Coffee Repair
Pumps, sensors, brewing units and software faults.
Learn moreThermador Appliance Repair
Pro ovens, ranges, cooktops, refrigeration columns.
Learn moreCommercial Dishwasher Repair
Hobart, CMA, conveyor and high-temp sanitizing systems.
Learn moreHVAC & Commercial Refrigeration
Diagnostics for AC, furnace, walk-ins and refrigeration.
Learn moreProperty Management Vendor
Reliable maintenance vendor for multi-unit portfolios.
Learn moreHow it works
A transparent, engineering-first process
01
Book Appointment
Schedule service online in a few clicks.
02
Paid Diagnostic
On-site inspection with proper instruments and service data.
03
Estimate / Quote
Clear repair options based on the actual issue.
04
Parts Deposit if Needed
Special-order parts may require a deposit.
05
Repair
Performed by a technical master with proper test procedures.
06
Invoice & Warranty
Pay on completion. Repair-specific warranty in writing.
For luxury homes
Owners of Sub-Zero, Wolf, Miele kitchens
Discreet, careful service for built-in suites where damage isn't an option. We protect cabinetry, floors and finishes.
For commercial kitchens
Restaurants, hotels & commissaries
Downtime is revenue lost. Priority response for Hobart, CMA, Hoshizaki and refrigeration systems.
For property managers
Multi-unit & portfolio vendor
One reliable vendor for appliances, HVAC and EV chargers across your buildings. Documented invoices and warranty terms.
Example diagnostic scenarios
Example Diagnostic Scenarios
Typical diagnostic situations KONGRA handles. Final diagnosis and repair scope are confirmed only after inspection.
Miele CVA
Coffee machine / milk system issue
Coffee system error or milk dispensing issue requiring service mode and brew/milk system diagnostics.
Example scenario
Bosch dishwasher
Drain pump periodically running
Pump activates even when not in use — possible float, leak protection or control issue.
Example scenario
Caldera Vanto
Hot tub GFCI tripping
Intermittent ground fault requiring leakage current and component isolation diagnostics.
Example scenario
JennAir cooktop
Igniter keeps clicking
Ignition switch, spark module, burner base or moisture-related diagnostic.
Example scenario
FAQ
Common questions
Need something specific? Call (408) 639-4750 or email hellokongra@gmail.com.
Feedback
Reviews help other Bay Area customers find engineering-level service.
If KONGRA delivered, a short review goes a long way for a local small business.
Book your appointment. We'll handle the rest.
Schedule online in under a minute. Same-day windows available across San Jose and the Bay Area.