Troubleshooting Chart

For Models Using White Rodgers or Robertshaw Thermostat

Symptom	Probable Cause	Corrective Action	Service
			Procedure

Pilot will not light

Pilot will not

stay lit

when button is released

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.

1.Poor thermocouple connection at

gas control.

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 gas control.

6.Defective magnet in gas control.

1.	Turn on gas supply and/or check line
	pressure.	1.	See Service Procedure
2. Review lighting instruction. Set			AG-III, Page 12.
	gas control to correct position.
3.	Review lighting instruction. Fully depress	4.	See Service Procedure
	pilot lighting button.		AG-II, Page 9.
4.	Clean, repair or replace.

1.Check connection at gas control.

Proper tightness should be finger tight plus ¼ turn.

2. Inspect thermocouple to ensure that it is		4.	See Service Procedure
	fully engaged into pilot bracket.		AG-I, Page 6
3.	Adjust tip of thermocouple to be fully
	engulfed by pilot flame.	5.	See Service Procedure
4.	Check thermocouple and replace if		AG-III, Page 12
	necessary.
5.	Check ECO continuity and replace	6.	See Service Procedure
	gas control if necessary.		AG-III, Page 12

6.Check magnet operation and replace gas control if necessary.

Pilot will light, but the main burner will not come on

Pilot goes out

periodically (after

heating cycles, once a day, once a week etc.)

Not enough hot water

1.Gas Control set too low for desired water temperature.

2. Gas Control temperature is satisfied.

3.Insufficient gas supply or low gas pressure.

4.Gas Control has wide differential or is out of calibration.

1. Insufficient combustion air supply.

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

3.Inconsistent gas supply or gas pressure.

1.Gas Control 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.Gas Control is out of calibration/not functioning.

6.Out of spec dip tube is diluting hot water with cold water.

7.Integrated mixing device is set too low for desired water temperature.

1.Adjust temperature dial on gas control.

2.Check temperature dial setting on gas control.

3.Check gas supply and line pressure.

4.Check gas control

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.

2. Check venting for proper sizing and proper operation

3. Check gas supply and line pressure.

1.Check dial on gas control.

2.Extremely cold water going into the water 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 gas control

for proper operation, replace if necessary.

6.Inspect dip tube and replace if necessary.

7.Reset device using the procedure

in the instructions included with the device.

2. See Installation & operation manual.

3.See Service Procedure AG-III, Page 12

4.See Service Procedure AG-III, Page 12

3.See Service Procedure AG-III, Page 12

5.See Service Procedure AG-III, Page 12

6.See Service Procedure AG-V, Page 23

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