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How to Use This Manual
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 UPV Series water heaters. Understanding the
sequence of operation section of this manual will contribute greatly to troubleshooting the water
heater.
The Honeywell WV4462A Electronic Gas Control will display status codes in the event of abnormal
operation. Status codes are listed in the troubleshooting chart beginning on page 12 of this service
manual. The troubleshooting chart will also indicate the probable cause for the status code and direct
the service professional to a service procedure to properly diagnose the abnormal operation.
In some difficult to diagnose conditions, it may be necessary to isolate the heater from the vent
system to determine the problem.
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 (magnahelic) 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 readings. 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 Gauge:
Used to measure water supply pressure. Also used to determine tank
pressure by adapting to the drain valve of the heater.
Various Hand Tools:
Pipe wrench, channel locks, open end wrenches (3/8”, 7/16”, 1/2”), 12”
crescent wrench, Allen wrench set, screwdrivers (common & Phillips & T20 Torx), 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.
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