Troubleshoting Chart - A.O. Smith GPVL-50 Service Handbook

PROBLEM
BURNER FLAME TOO
HIGH
FLAME BURNS AT
ORIFICE
INSUFFICIENT HOT
WATER
WATER IS TOO HOT
SLOW HOT WATER
RECOVERY
DRIP FROM RELIEF
VALVE
GAS CONTROL/
THERMOSTAT FAILS TO
SHUT OFF
SMELLY WATER
CONDENSATION
COMBUSTION ODORS
36

TROUBLESHOTING CHART

POSSIBLE CAUSE(S)
1. Insuffi cient secondary air
2. Orifi ce too large
1. Low gas pressure
2. D e f e c t i v e g a s c o n t r o l
(thermostat)
1. Low gas pressure
2. Orifi ce too small
3. Thermostat set too low
4. Gas control error codes
5. Sediment or lime in tank
6. Water heater too small
7. Wrong piping connections
8. Leaking faucets
9. Wasted hot water
10. Long runs of exposed piping
11. Hot water piping in outside
wall
1. Thermostat is too high
2. D e f e c t i v e g a s c o n t r o l
(thermostat)
1. Insuffi cient secondary air
2. Low gas pressure
3. Orifi ce too small
4. Thermostat set too low
5. Heater too small
6. Wrong piping connection
7. Wasted hot water
8. Flue clogged
1. Pressure build-up
2. Heater stacking
3. Closed water system
4. Improperly seated valve
1. D e f e c t i v e g a s c o n t r o l
(thermostat)
1. Sulfi des in water supply
2. Bacteria in water supply
1. Filling the new water heater for
the fi rst time
2. Moisture from the products of
combustion
3. Water dripping from blower
assembly
4. Undersized water heater
1. Insuffi cient secondary air
2. Flue clogged
3. Heater installed in a confi ned
area
4. House too tight
CORRECTIVE ACTION
1. Provide ventilation to water heater
2. Replace with correct orifi ce
1. Check with gas utility company
2. Replace gas control (thermostat)
1. Check with gas utility company
2. Replace with correct orifi ce
3. Turn temperature knob to higher setting
4. Refer to gas control error code in the Installation
and Operating Manual
5. Drain/fl ush-provide water treatment if needed
6. Install adequate heater
7. Correct piping: dip tube must be in cold inlet
8. Repair faucets
9. Advise customer
10. Insulate piping
11. Insulate piping
1. Turn temperature knob to lower setting
2. Replace the gas control (thermostat)
1. Provide ventilation to water heater. Check fl ue
way, fl ue baffl e and burner
2. Check with gas utility company
3. Replace with correct orifi ce
4. Turn temperature knob to higher setting
5. Install adequate heater
6. Correct piping-dip tube must be in cold inlet
7. Advise customer
8. Clean fl ue, locate source and correct
1. Use a pressure reducing valve and relief valve
2. Lower the thermostat setting
3. See "Thermal Expansion" Section in the
Manual
4. Check Relief valve for proper operation (Do Not
plug T&P valve)
1. Replace gas control (thermostat)
1. See "Smelly water" section in the Manual
2. See "Smelly water" section in the Manual
1. Normal operation: the condensation should
disappear after heater warms up
2. Normal operation: the condensation should
disappear in time
3. Provide drip "TEE" to the horizontal section of
exhaust vent close to blower assembly
4. Install adequate heater
1. Provide fresh air ventilation to the water heater
2. Clean, locate source and correct
3. Provide fresh air ventilation to the water heater
4. Provide fresh air ventilation to the water heater