A.O. Smith GDV - Troubleshooting Guidelines; Burner Will Not Ignite; Smelly Water Issues; Burner Flame Yellow-Lazy

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PROBLEM POSSIBLE CAUSE(S) CORRECTION
BURNER WILL NOT IGNITE
Pilot not lit
Thermostat set too low
No gas
Dirt in the gas lines
Pilot line clogged
Main burner line clogged
Defective thermopile
Defective gas control/thermostat
1.
2.
3.
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6.
7.
8.
Light pilot
Turn temp. dial to desired temperature
Check with gas utility company
Notify utility-install trap in gas line
Clean, locate source and correct
Clean, locate source and correct
Replace thermopile
Replace gas control/thermostat
1.
2.
3.
4.
5.
6.
7.
8.
SMELLY WATER Sulfur in the water1. Replace the anode with a special anode1.
BURNER FLAME YELLOW-
LAZY
Low gas pressure
Flue clogged
Main burner line clogged
Obstruction in main burner orifi ce
1.
2.
3.
4.
Check with gas utility company
Clean, locate source and correct
Clean, locate source and correct
Clean or replace orifi ce
1.
2.
3.
4.
PILOT WILL NOT LIGHT OR
REMAIN LIT
Air in gas line
No gas
Dirt in gas lines
Pilot line or orifi ce clogged
Defective thermopile
Cold drafts
Gas control/thermostat ECO switch open
Defective igniter or electrode
Low gas pressure
1.
2.
3.
4.
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6.
7.
8.
9.
Bleed the air from the gas line
Check with gas utility company
Notify utility-install sediment trap (dirt leg) in
gas line
Clean, locate source and correct
Replace thermopile
Locate source and correct
Replace gas control/thermostat
Replace igniter or pilot assembly
Check with gas utility company
1.
2.
3.
4.
5.
6.
7.
8.
9.
HIGH OPERATION COSTS
Thermostat set too high
Sediment or lime in tank
Water heater too small for job
Wrong piping connections
Leaking faucets
Gas leaks
Wasted hot water
Long runs of exposed piping
Hot water piping in exposed wall
Leaks or cracks in dip tube
1.
2.
3.
4.
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6.
7.
8.
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10.
Set temperature dial to lower setting
Drain/Flush-Provide water treatment if need-
ed
Install adequate size heater
Correct piping-dip tube must be in cold inlet
Repair faucets
Check with utility-repair at once
Advise customer
Insulate piping
Insulate piping
Check dip tube. Replace if faulty
1.
2.
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9.
10.
PILOT FLAME TOO SMALL
Pilot line or orifi ce clogged
Low gas pressure
Defective pilot
1.
2.
3.
Clean, locate source and correct
Check with gas utility company
Replace pilot
1.
2.
3.
INSUFFICIENT HOT WATER
Thermostat set too low
Sediment or lime in tank
Water heater too small
Wrong piping connections
Leaking faucets
Wasted hot water
Long runs of exposed piping
Hot water piping in outside wall
Low gas pressure
1.
2.
3.
4.
5.
6.
7.
8.
9.
Turn temperature dial to desired setting
Drain/fl ush-provide water treatment if need-
ed
Install adequate size heater
Correct piping-dip tube must be in cold inlet
Repair faucets
Advise customer
Insulate piping
Insulate piping
Check with gas utility company
1.
2.
3.
4.
5.
6.
7.
8.
9.
SLOW HOT WATER RECOV-
ERY
Insuffi cient secondary air
Flue clogged
Low gas pressure
Improper calibration
Gas control/thermostat set too low
Water heater too small
Wrong piping connections
Wasted hot water
1.
2.
3.
4.
5.
6.
7.
8.
Provide ventilation to water heater. Check
fl ue way, fl ue baffl e and burner
Clean fl ue, locate source and correct
Check with gas utility company
Replace gas control/thermostat
Turn temperature dial to desired setting
Install adequate size heater
Correct piping-dip tube must be in cold inlet
Advise customer
1.
2.
3.
4.
5.
6.
7.
8.
TROUBLESHOOTING GUIDELINES