Bradford White Defender RG130T Series Service Manual page 7

White Rodgers Mechanical Gas Control Troubleshooting Chart
Flammable Vapor Ignition Resistant Water Heaters
Symptom Probable Cause
1. Insufficient combustion air
Pilot goes out supply.
periodically (after 2. Incorrect or clogged vent
heating cycles,
system/vent terminal, or
once a day, once
incorrect location.
a week etc.)
3. Inconsistent gas supply or
gas pressure.
1. Combination thermostat/gas
valve set too low for desired
water temperature.
2. Cold inlet water temperature
is very cold.
3. High demand periods.
Not enough hot 4. Incorrectly sized water
water
heater for application.
5. Combination thermostat/gas
valve is out of calibration/not
functioning.
6. Out of spec dip tube is
diluting hot water with cold
water.
Corrective Action
1. Verify adequate combustion air
is available to the unit. Check
and clear jacket slot openings of
any dirt, dust, restrictions or
other obstructions. Inspect flame
arrestor plate and clean with stiff
bristled brush and compressed
air to remove any debris
accumulation.
2. Check venting for proper sizing
and proper operation.
3. Check gas supply and line
pressure.
1. Check dial on combination
thermostat/gas valve.
2. Extremely cold water going into
the heater will decrease the
amount of hot water produced. It
may be necessary to temper
incoming water supply.
3. Adjust high demand usage.
4. Contact plumbing professional.
5. Check combination
thermostat/gas valve for proper
operation, replace if necessary.
6. Inspect dip tube and replace if
necessary.
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Service
Procedure
1. See Service
Procedure RG-
VIII
2. See Service
Procedure RG-V
1. See Service
Procedure RG-V
2. See Service
Procedure RG-IX
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