Bradford White 50T65F Service Manual Download Page 4

Page: 4 / 28

SYMPTOM

PROBABLE CAUSE

CORRECTIVE ACTION

Pilot Will Not Light

1. No incoming gas or too low gas
pressure.
2. Gas control knob set to wrong position.
3. Pilot light button not being fully
depressed when attempting to light pilot.
4. Pilot orifice or pilot tube is obstructed or
kinked.
5. Pilot electrode not sparking to pilot.
6. Piezo igniter not functioning.

1. Poor thermocouple connection at
combination thermostat/gas valve.
2. Thermocouple not fully engaged in pilot
assembly bracket.
3. Pilot flame is not fully enveloping the
thermocouple “hot” junction.
4. Weak or defective thermocouple.
5. Open ECO on combination thermostat/
gas valve.
6. Defective magnet in combination
thermostat/gas valve.
7 Resettable thermal switch has opened.

Pilot Will Not

stay lit

when button is

released

Pilot will light but

the main burner

will not come on

1. Combination thermostat/gas valve set too
low for desired water temperature.
2. Combination thermostat/gas valve
temperature is satisfied.
3. Insufficient gas supply or low gas
pressure.
4. Combination thermostat/gas valve has
wide differential or is out of calibration.

Pilot goes out

periodically (after

heating cycles,

once a day, once

a week etc.)

1. Insufficient combustion air supply.

2. Incorrect, clogged vent system/ vent
terminal or location.

3. Inconsistent gas supply or gas pressure.

Not enough hot

water

1. Combination thermostat/gas valve set too
low for desired water temperature.
2. Cold inlet water temperature is very cold.
3. High demand periods.
4. Incorrectly sized 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.

1. Turn on gas supply and/or check line
pressure.
2. Review lighting instruction. Set

combination/thermostat

gas valve to correct position.
3. Review lighting instruction. Fully depress
pilot lighting button.
4. Clean, repair or replace.
5. Verify correct electrode position. Replace
pilot assembly.
6. Replace Piezo igniter.

1. Check connection at combination
  thermostat/gas valve. Proper tightness
  should be finger tight plus ¼ turn.
2. Inspect thermocouple to ensure that it is
fully engaged into pilot bracket.
3. Adjust tip of thermocouple to be fully
engulfed by pilot flame.
4. Check thermocouple and replace if
necessary.
5. Check ECO continuity and replace
  combination thermostat/gas valve if
necessary.
6. Check magnet operation and replace
  combination thermostat/gas valve if
necessary.
7. Determine cause of switch activation. To
reset, depress button on resettable thermal
  switch located on inner door.

1. Adjust temperature dial on combination
thermostat/gas valve.
2. Check temperature dial setting on
combination thermostat/gas valve.
3. Check gas supply and line pressure.
4. Check combination thermostat/gas valve
for proper operation, replace if
necessary.

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/or vacuum 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.

SERVICE

PROCEDURE

1. See Service Procedure
RG-V, Page 12.

4. See Service Procedure
RG-III, Page 10.

5. See Service Procedure
RG-III, Page 10.

6. See Service Procedure
RG-IV, Page 11.

4. See Service Procedure
RG-II, Page 8

5. See Service Procedure
RG-V, Page 14

6. See Service Procedure
RG-V, Page 13

2. See Installation &
operation manual.

3. See Service Procedure
RG-V, Page 12

4. See Service Procedure
RG-V, Page 12