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It is intended for this manual to be used by qualified service personal for the primary purpose of
troubleshooting and repair of the Bradford White ECO-DEFENDER Series of water heaters.
The Honeywell WV8860Q Gas Control will display error codes in the event of abnormal operation.
Error codes are listed in the troubleshooting chart beginning on page 5 of this service manual. The
troubleshooting chart will also indicate the probable cause for the error 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 can not be made
using the methods described in this service manual.
Page 4
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 part number 239-45991-00. A specialized tool designed to remove
the gas control from gas control thermal well. Available from
your Bradford White parts supplier.
Various Hand Tools: Pipe wrench, channel locks, open end wrenchs (3/8",7/16",½"),
12" crescent wrench, Allen wrench set, screw drivers (common &
Phillips), ¼" 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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