Bradford-White Corp MI60T, CX), MI50L Corrective Action, Service, Procedure, Troubleshooting Chart

TROUBLESHOOTING CHART

Flammable Vapor Ignition Resistant Water Heaters

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.

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.

1.	Turn on gas supply and/or check line	1.	See Service Procedure
	pressure.		RG-V, Page 12.
2.	Review lighting instruction. Set
	combination/thermostat	4.	See Service Procedure
	gas valve to correct position.		RG-III, Page 10.
3.	Review lighting instruction. Fully depress
	pilot lighting button.	5.	See Service Procedure
4.	Clean, repair or replace.		RG-III, Page 10.
5.	Verify correct electrode position. Replace
	pilot assembly.	6.	See Service Procedure
6.	Replace Piezo igniter.		RG-IV, Page 11.

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	4.	See Service Procedure
	engulfed by pilot flame.		RG-II, Page 8
4.	Check thermocouple and replace if
	necessary.	5.	See Service Procedure
5.	Check ECO continuity and replace		RG-V, Page 14
	combination thermostat/gas valve if
	necessary.	6.	See Service Procedure
6.	Check magnet operation and replace		RG-V, Page 13
	combination thermostat/gas valve if
	necessary.

7.Determine cause of switch activation. To reset, depress button on resettable thermal switch located on inner door.

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.)

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.

1.Insufficient combustion air supply.

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

3.Inconsistent gas supply or gas pressure.

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.

2.See Installation & operation manual.

3.See Service Procedure RG-V, Page 12

4.See Service Procedure RG-V, Page 12

1.See Service Procedure RG-VIII, Page 22

3.See Service Procedure RG-V, Page 12

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.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.

5.See Service Procedure RG-V, Page 12

6.See Service Procedure RG-IX, Page 23

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