Bradford White D100L300 User Manual

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Manual 47985A REV 08/18
SERVICE
MANUAL
Troubleshooting Guide
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
For The Bradford White
“D” Series Models:
D38T155
D75T(125,160,300)
D65T(370,399)
D80T(180,199,250)
D80T(425,505)
D100T(199,250)
D80L(399,450,505)
D100L(199,250,270,300)
D100S(199,250)
Gas Water Heaters
COMMERCIAL 24 VOLT FLUE DAMPER
SERIES WATER HEATER WITH HONEYWELL
INTEGRATED CONTROL SYSTEM
®

Bradford White D100L300 Specifications

General

Brand	Bradford White
Model	D100L300
Category	Water Heater
Language	English

Summary

Specifications

Sequence of Operation

Troubleshooting

Water Heater Operation Issues

Guides users through diagnosing common operational faults and blank display errors.

Accessing Service Mode

Guide for service personnel to enter and navigate the water heater's service mode for diagnostics.

Error Code History and Display

Details how to access and interpret error codes and historical fault data from the water heater display.

Error Code Definitions

Service Procedure D24-I Thermostat Circuit Testing

Sensor Resistance Testing

Service Procedure D24-II Pilot Operation Testing

Pilot Inspection

Service Procedure D24-III Main Burner Operation Testing

Service Procedure D24-IV Main Burner & Pilot Removal and Inspection

Service Procedure D24-IV Control Board Replacement

Control Board Replacement

Service Procedure D24-V Flue Baffle Removal, Inspection

Service Procedure D24-VI Anode Removal and Inspection