Bosch HBL8451UC User Manual

S
ERVICE
M
ANUAL
for
800 Series
Built-in Wall Ovens
HBL8442UC HBL8752UCC*
HBL8451UC HBL87M52UCC*
HBL8461UC HBL8742UCC*
HBL8642UC
HBL8651UC HBN8451UC
HBL8661UC HBN8651UC
This manual contains information that is necessary for
servicing the following Bosch electric built-in wall ovens:
HBL8442UC, HBL8451UC, HBL8461UC, HBL8642UC,
HBL8651UC, HBL8661UC, HBL8742UC
HBL8752UCC, HBL87M52UCC, HBL8742UCC
HBN8451UC, HBN8651UC
This manual is designed to be used by qualified service
personnel only. Due to the complexity and the risk of
high-voltage electrical shock, Bosch does not recommend
that customers service their own units.
This material is intended for the sole use of BSH
authorized persons and may contain confidential and
proprietary information. Any unauthorized review, use,
copying, disclosure, or distribution in any format is
prohibited.
*HBL8752UCC is the traditional wall oven component of
the HBL8752UC combination oven (set), which also
includes the HMC80252UC Speed microwave oven.
**HBL87M52UCC is the traditional wall oven component
of the HBL87M52UC combination oven (set), which also
includes the HMB50152UC Solo microwave oven.
**HBL8742UCC is the traditional wall oven component of
the HBL8742UC combination oven (set), which also
includes the HMC80242UC Speed microwave oven.

Bosch HBL8451UC Specifications

General

Style	single wall oven
Color	stainless steel
Oven Capacity	4.6 cubic feet
Convection	yes
Number of Rack Positions	6
Number of Oven Racks	3
Interior Light	yes

Weight and Dimensions

Current	30 amperes
Depth	24 12/25 inches
Height	29 inches
Width	30 inches

Summary

IMPORTANT SAFETY INFORMATION

Safety Before Servicing the Appliance

Precautions and warnings for safe servicing, including power disconnection and cooling.

GENERAL PRODUCT INFORMATION

Functional Changes, Models, and Warranty

Recap of changes, model details, combination ovens, rating label, and warranty.

OPERATION AND FEATURES

Allowable Operating Range by Cooking Mode

Minimum and maximum temperature ranges for various cooking modes.

Heating Elements and Duty Cycles

Information on heating elements used, their duty cycles and active modes.

Temperature Offset Settings

How to adjust oven cavity temperature offsets for cooking results.

Self-Clean and Cooling Fan Operation

Description of self-clean cycle behavior and cooling fan operation.

COMPONENT ACCESSIBILITY

Serviceable Components by Access Point

Lists components serviceable from the front, side, rear, and top of the oven.

Top Access Procedures for Combination Models

Steps for accessing the top service panel on combination oven models.

SERVICE AND REPAIR PROCEDURES

Oven Door Service and Replacement

Procedures for removing, reinstalling, and replacing oven door components.

Door Latch, HTC, and Control Panel Service

Service for door latch, high temperature cutout, control panel, and display module.

Heating Elements and Fan Service

Instructions for replacing convection, broil, and bake elements and fan components.

Sensor, Module, Fan, and Hinge Receiver Service

Guidance on replacing sensors, modules, fans, and hinge receivers.

TROUBLESHOOTING GUIDES

Oven Error Code Explanations and Solutions

Detailed descriptions, causes, and suggested actions for various oven error codes.

Service Mode Navigation and Tests

How to access and use the service mode for diagnostics and tests.

Troubleshooting Fault Trees

Flowcharts to guide troubleshooting for common oven operational failures.

WIRING DIAGRAMS AND SCHEMATICS

Wire Color Key and Strip Diagrams

Reference for wire colors and schematic diagrams for oven elements and connections.

ADDITIONAL REFERENCES

QuickFinder Resources and Documentation

List of documents and resources available on QuickFinder for further information.

Bosch Technical Support Contact Information

Contact information for technical assistance from Bosch support.