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How to Use this Manual
This manual serves as a supplement to the Defender Atmospheric service manual, p/n
238-44943-00. Please refer to the Defender Atmospheric service manual for all features on
this water heater that are consistent with a Defender (standard) Atmospheric water heater.
It is intended for this manual to be used by qualified service personnel for the primary purpose
of troubleshooting and repair of the Bradford White Programmable Efficiency water heaters.
Understanding the sequence of operation section of this manual will contribute greatly to
troubleshooting the water heater.
The Honeywell WV4460E Electronic Gas Control will display error codes in the event of
abnormal operation. Diagnostic codes are listed in the troubleshooting chart beginning on page
13 of this service manual. The troubleshooting chart will also indicate the probable cause for
the diagnostic code and direct the service professional to a service procedure to properly
diagnose the abnormal operation.
Contact the Bradford White technical support group immediately if diagnosis cannot be made
using the methods described in this service manual.
Tools Required for Service
Manometer:
A liquid “U” tube type or a digital (magna-helic) type can be used. This device is
used to measure gas and/or air pressure and vacuum.
Multi-Meter:
A digital type is strongly recommended. This device is used to measure electrical
values. The meter you select must have the capability to measure volts AC, volts DC, amps,
micro-amps and ohms.
Electronic Probes:
In some cases, standard multi-meter probes will damage or simply not be
effective to obtain certain voltage and ohm reading. It will be necessary to have special
electronic “pin” type multi-meter probes. These probes are available at most electronic
wholesale outlets.
Thermometer:
Used to measure water temperature. An accurate thermometer is
recommended.
Water Pressure Gage:
Used to measure water supply pressure. Also used to determine tank
pressure by adapting to the drain valve of the heater.
Gas Control Service Tool:
BWC p/n 239-45991-00. A specialized tool designed to remove
the gas control from the thermal well. Available from your Bradford White parts supplier and is
supplied with replacement gas controls.
Various Hand Tools:
Pipe wrench, channel locks, open end wrenches (3/8", 7/16", 1/2"), 12"
crescent wrench, Allen wrench set, screw drivers (common & Phillips), 1/4" nut driver, pliers
(common & needle nose), socket set, side cutters, wire cutters, wire strippers, wire crimpers,
torpedo level, small shop vac, step ladder, flashlight, and 5 gallon pail.
How to Use this Manual
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