
Premium appliance repair · San Jose & Los Gatos
High-End Appliance Repair
in San Jose & Los Gatos
Repair and complex diagnostics for Sub-Zero, Wolf, Miele, Thermador, Viking, COVE and Hestan. Commercial and industrial equipment service, too.
Specialized service
Repair & complex diagnostics.
Home appliances, commercial equipment and technical systems.

Residential / High-End
Diagnostics and repair for high-end appliances, built-in refrigeration and premium home equipment.
Selected brandsSub-Zero · Wolf · Miele · Thermador · Gaggenau · Viking
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Commercial Equipment
Equipment diagnostics and repair for restaurants, bakeries, hotels and commercial kitchens.
Selected brandsRATIONAL · Hobart · Sveba-Dahlen · XLT · Hoshizaki · La Marzocco
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Refrigeration & HVAC
Commercial refrigeration repair, temperature-system troubleshooting and selected HVAC diagnostics.
Selected brandsTrue · Traulsen · Daikin · JULABO · Huber · Edwards
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Industrial & Automation
Fault diagnostics and component-level repairs for selected machinery, drives, controls and production equipment.
Selected brandsSiemens · Allen-Bradley · Mitsubishi Electric · Yaskawa · FANUC · ABB
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Medical, Dental & Laboratory
Model-specific diagnostics for selected laboratory, biotech, dental and non-life-support medical equipment.
Selected brandsThermo Scientific · Eppendorf · Beckman Coulter · PHCbi · Tuttnauer · Ivoclar
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Facilities / Property
Equipment repairs, service work orders and optional maintenance for managed properties.
Selected brandsSub-Zero · Miele · Speed Queen · Continental Girbau · Hobart · Hoshizaki
Explore serviceAdvanced technical services
Complex equipment. Structured diagnostics.
Advanced manufacturing, medical and scientific equipment assessment, machine controls, private AI and connected infrastructure.
About KONGRA
Precision.
Experience. Results.
Repair and complex diagnostics, with measured findings and written estimates.
Our approachDiagnostics before parts replacement
Inspection and measurement guide the proposed repair.
Clear scope. Written estimate.
Review the recommended work and price before authorizing repair.
California registration A51625
Verify Appliance Service Dealer registrationLocal service. Business-ready documentation.
W9 and COI available upon request.
Real KONGRA work
Equipment we know from the field.
Service photographs and documented case studies.

Inside a documented field case
Sveba-Dahlen C152
Uneven baking. Inconsistent rotation.
A Sveba-Dahlen C152 rack oven was assessed for uneven browning, one-sided burning and abnormal rack rotation. The complaint defined the diagnostic scope; it did not prove one failed component.
Findings before a parts decision.
Control settings and calibration data were recorded alongside mechanical, airflow and combustion checks. The earlier diagnostic record does not establish a final cause or a completed bake-quality repair.
A separate hinge service, completed.
On a later visit, two customer-supplied hinge assemblies were replaced. Door alignment and closing were checked, the oven was reassembled and an operational check was performed. This result applies to the hinge service.

Sub-Zero Built-In Refrigeration
KONGRA field photograph · built-in refrigeration service
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Sveba-Dahlen C152
Documented rack-oven inspection and service context
Read the field case
CMA Commercial Dishwasher
KONGRA field photograph · commercial warewashing equipment
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Miele Built-In Refrigerator
KONGRA field photograph · equipment inspection
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