Troubleshooting Guidelines; Manual - A.O. Smith GDV Instruction Manual

PROBLEM
BURNER WILL NOT IGNITE
SMELLY WATER
BURNER FLAME YELLOW-
LAZY
PILOT WILL NOT LIGHT OR
REMAIN LIT
HIGH OPERATION COSTS
PILOT FLAME TOO SMALL
INSUFFICIENT HOT WATER

TROUBLESHOOTING GUIDELINES

POSSIBLE CAUSE(S)
1. Pilot not lit
2. Thermostat set too low
3. No gas
4. Dirt in the gas lines
5. Pilot line clogged
6. Main burner line clogged
7. Defective thermocouple
8. Defective gas control/thermostat
9. Heater installed in a confi ned area
1. Sulfur in the water
1. Insuffi cient secondary air
2. Low gas pressure
3. Flue clogged
4. Main burner line clogged
5. Heater installed in a confi ned area
6. Obstruction in main burner orifi ce
1. Air in gas line
2. No gas
3. Dirt in gas lines
4. Pilot line or orifi ce clogged
5. Thermocouple connection loose
6. Defective thermocouple
7. Cold drafts
8. Gas control/thermostat ECO switch open
9. Door-mount temperature cut-off (TCO)
switch activated.
10. Defective igniter or electrode
11. Flammable vapors incident, Flame Guard
function activated
12. Low gas pressure
13. Improper installation of the quick connects
in the TCO-switch, loose connection or inter-
rupted gas control leads.
1. Thermostat set too high
2. Sediment or lime in tank
3. Water heater too small for job
4. Wrong piping connections
5. Leaking faucets
6. Gas leaks
7. Wasted hot water
8. Long runs of exposed piping
9. Hot water piping in exposed wall
10. Leaks or cracks in dip tube
1. Pilot line or orifi ce clogged
2. Low gas pressure
3. Defective pilot
1. Thermostat set too low
2. Sediment or lime in tank
3. Water heater too small
4. Wrong piping connections
5. Leaking faucets
6. Wasted hot water
7. Long runs of exposed piping
8. Hot water piping in outside wall
9. Low gas pressure
1. Light pilot
2. Turn temp. dial to desired temperature
3. Check with gas utility company
4. Notify utility-install trap in gas line
5. Clean, locate source and correct
6. Clean, locate source and correct
7. Replace thermocouple
8. Replace gas control/thermostat
9. Provide fresh air ventilation
1. Replace the anode with a special anode
1. Provide ventilation to water heater
2. Check with gas utility company
3. Clean, locate source and correct
4. Clean, locate source and correct
5. Proper fresh air ventilation
6. Clean or replace orifi ce
1. Bleed the air from the gas line
2. Check with gas utility company
3. Notify utility-install dirt trap in gas line
4. Clean, locate source and correct
5. Finger tighten: then 1/4 turn with wrench
6. Replace thermocouple
7. Locate source and correct
8. Replace gas control/thermostat
9. Call a qualifi ed service technician
10. Replace igniter or pilot assembly
11. Replace water heater, eliminate fl ammable
TM
vapors source. Call a qualifi ed service tech-
nician
12. Check with gas utility company
13. Reset the TCO - switch. Check if the quick
connects are fi rmly inserted on TCO switch
contacts.
1. Set temperature dial to lower setting
2. Drain/Flush-Provide water treatment if need-
ed
3. Install adequate size heater
4. Correct piping-dip tube must be in cold inlet
5. Repair faucets
6. Check with utility-repair at once
7. Advise customer
8. Insulate piping
9. Insulate piping
10. Check dip tube. Replace if faulty
1. Clean, locate source and correct
2. Check with gas utility company
3. Replace pilot
1. Turn temperature dial to desired setting
2. Drain/fl ush-provide water treatment if need-
ed
3. Install adequate size heater
4. Correct piping-dip tube must be in cold inlet
5. Repair faucets
6. Advise customer
7. Insulate piping
8. Insulate piping
9. Check with gas utility company
27
CORRECTION