Gas Control Troubleshooting

Observe red LED indicator on gas control. Error flash codes are displayed with a three second pause before repeating. Check and repair the system as noted in the troubleshooting table below.

Red LED Indicator

LED Status

Control Status

Probable Cause

Service Procedure

 

 

Gas valve is operating

 

If the pilot will not stay lit

 

 

normally. Pilot flame

1. Gas valve is

 

None (LED not on

replace thermopile, see

 

may not be present.

functioning normally

 

page 10. If problem

 

or flashing)

Check for pilot flame

2. Gas valve is not

 

persists replace gas

 

 

through sight glass and

powered. Light pilot

 

 

valve, see page 16.

 

 

light if necessary.

 

 

 

 

 

 

One flash and

If set point knob is in

Gas valve is powered

 

 

"PILOT" position then

and waiting for the set

Normal operation. Adjust

 

three second

pilot flame is detected.

point knob to be turned

thermostat to desired

 

pause.

Turn set point knob to

to a water temperature

temperature level.

 

 

desired setting

setting.

 

 

 

Set point knob has

 

 

 

LED on

been recently turned to

Set point knob was

LED will go out and the

 

the "OFF" position.

turned to "OFF"

control will function

 

continuously.

Wait until LED goes out

normally when the pilot is

 

 

before attempting to

position.

lit.

 

 

 

 

 

relight

 

 

 

 

Weak pilot flame

1. Thermopile failure

 

 

Two flashes and

2. Unstable pilot.

1. See page 10.

 

detected. System will

3. Pilot tube block or

 

three second

2&3. See page 12.

 

reset when pilot flame

restricted.

 

pause.

4. See page 21.

 

is sufficient.

4. Resettable thermal

 

 

 

 

 

 

switch has opened.

 

 

Three flashes and

Insufficient water

1. Thermowell sensor

 

 

and chamber

1&2. See pages 14 and

 

three second

heating. System will

temperature sensor out

 

pause.

reset.

of calibration.

18.

 

 

 

 

 

2. Possible short.

 

 

Four flashes and

Excessive tank

1. Thermowell sensor

1. See page 14.

 

three second

temperature. System

out of calibration.

 

2. See page 16.

 

pause.

must be reset.

2. Faulty gas valve.

 

 

 

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Bradford-White Corp U130T*FRN, Eco Defender warranty LED Status, Probable Cause Service Procedure
Page 4 Page 6

U130T*FRN, Eco Defender specifications

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