Bradford White RG130T N Series Service Manual page 6

White Rodgers Mechanical Gas Control Troubleshooting Chart
Symptom
1. No incoming gas or too low
2. Gas control knob set to
3. Gas control knob not being
Pilot will not light
4. Pilot orifice or pilot tube is
5. Pilot electrode not sparking to
6. Piezo igniter not functioning.
1. Poor thermocouple
2. Thermocouple not fully
3. Pilot flame is not fully
Pilot will not stay lit
4. Weak or defective
when button is
released
5. Open ECO in
6. Defective magnet in
7. Resettable thermal switch
1. Combination thermostat/gas
2. Combination
Pilot will light but
the main burner
will not come on 3. Insufficient gas supply or
4. Combination thermostat/gas
6
Flammable Vapor Ignition Resistant Water Heaters
Probable Cause
gas pressure.
wrong position.
fully depressed when
attempting to light pilot.
obstructed or kinked.
pilot.
connection at combination
thermostat/gas valve.
engaged in pilot assembly
bracket.
enveloping the thermocouple
bulb.
thermocouple.
combination thermostat/
gas valve.
combination thermostat/gas
valve.
has opened.
valve set too low for desired
water temperature.
thermostat/gas valve
temperature is satisfied.
low gas pressure.
valve has wide differential or
is out of calibration.
Corrective Action
1. Turn on gas supply and/or check
line pressure.
2. Review lighting instruction. Set gas
control knob to correct position.
3. Review lighting instruction. Fully
depress gas control knob.
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
+ a 1/4 turn.
2. Inspect thermocouple to ensure
that it is fully engaged into pilot
bracket.
3. Clean pilot orifice and verify pilot
tube is clear; check gas supply
and line pressure.
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.
6
Service
Procedure
1. See Service
Procedure RG-V
2. See Service
Procedure RG-III
3. See Service
Procedure RG-III
4. See Service
Procedure RG-IV
1. See Service
Procedure RG-II
2. See Service
Procedure RG-V
3. See Service
Procedure RG-V
1. See Installation
and Operation
Manual.
2. See Service
Procedure RG-V
3. See Service
Procedure RG-V