Troubleshooting - Bradford White RG2F40S*(N,X) Service Manual

Observe the green LED on the water heater gas control. Status
codes are displayed with a 3 second pause before repeating.
Once the status code is known, check and repair the water
heater, as recommended in the table below.
LED Status Control Status
None (LED not Electrical power not
on or flashing) present
One short flash Stand-by mode,
every four Thermostat is
seconds satisfied (no faults)
One short flash Stand-by mode,
every two Sabbath mode (no
seconds
Alternates
Thermostat calling
bright and dim
for heat (no fault)
(heartbeat)
Short flash once Weak pilot signal
every second on last call for heat
Two flashes, Pressure switch not
three second working - closed
pause position
Pressure switch or
Three flashes,
temperature switch
three second
not working - open
pause
position
Excessive tank
Four flashes,
temperature,
three second
system must be
pause
Five flashes,
False pilot flame
three second
present
pause
Six flashes, one
Failed to light pilot,
flash, three
system resets after
second pause
(5) minutes
(Soft Lockout)
Control power switch in "OFF"
position.
Supply voltage interrupted.
Temperature demand is satisfied
(no call for heat)
Temperature on Setback Control is
adjusted down to prevent burner
faults) operation
Tank temperature below setpoint of
thermostat
1. Unstable pilot
2. Pilot tube blocked or restricted
3. Oxidation build-up on pilot
electrode
4. Wire damage to pilot assembly or
bad connection at gas control
1. Pressure switch tubing kinked or
blocked
2. Blocked pressure tap on switch
or blower
3. Faulty pressure switch
1. Vent blockage or improper vent
configuration
2. Pressure switch tubing kinked or
blocked
3. Faulty pressure switch
4. Blower not spinning up to speed
5. Damper (inside blower) not fully
opening
6. Faulty blower temperature switch
1. Temperature sensor out of
calibration
2. Faulty gas control
reset
Pilot valve stuck in open position
1. Unstable pilot
2. Pilot tube block or restricted
3. Oxidation build-up on pilot
electrode
4. Wire damage to pilot assembly or
bad connection at gas valve
Probable Cause

Troubleshooting

Service Procedure
Turn Power On
Normal operation
Normal operation
Normal operation
1. See Burner Inspection on page
15
2-4. See Pilot Inspection, Testing
and Replacement on page 17
See Pressure Switch Testing and
Replacement on page 32
1. Verify cord sets are fully plugged
in
2. See Pressure Switch Testing and
Replacement on page 32
1. Test Gas Control & Temperature
Sensor
2. Replace gas control if necessary
Replace gas control
1. See Burner Inspection on page
15
2-4. See Pilot Inspection, Testing
and Replacement on page 17
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