Troubleshooting Guide - John Wood POWER VENTED GAS FIRED WATER HEATER Installation And Operating Instructions Manual

TROUBLESHOOTING GUIDE

These guidelines should be utilized by a qualifi ed service agent.
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 VALVE/
THERMOSTAT FAILS TO
SHUT OFF
SMELLY WATER
CONDENSATION
POSSIBLE CAUSE(S)
1. Air inlets blocked
2. Insuffi cient secondary air
3. Orifi ce too large
1. Low gas pressure
2. Defective gas control valve/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. Defective gas control valve/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
9. Air inlets blocked
1. Pressure build-up
2. Heater stacking
3. Closed water system
4. Improperly seated valve
1. Defective gas control valve/thermostat
1. Sulfi des in water supply
2. Bacteria in water supply
3. Standard anode incompatible with water
composition
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. Unblock inlet air openings
2. Provide ventilation to water heater
3. Replace with correct orifi ce
1. Check with gas utility company
2. Replace gas control valve/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 codes
5. Drain/flush-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 valve/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
9. Unblock inlet air openings
1. Use a pressure-reducing valve and relief
valve
2. Lower the thermostat setting
3. See thermal expansion section
4. Check Relief valve for proper operation (Do
Not plug T&P valve)
1. Replace gas control valve/thermostat
1. Chlorination procedure
2. Chlorination procedure
3. Install special annode
1. Normal operation: the condensation should
disappear after heater warms up
2. Normal operation: the condensation should
disappear in time
3. Install condensate hose to drain port on the
rubber coupling
4. Install adequate heater
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CORRECTIVE ACTION