Troubleshooting - A.O. Smith POWER VENT GAS Installation And Operating Manual

These guidelines should be utilized by a qualifi ed service agent.
Problem
NOT ENOUGH HOT WATER
CONDENSATION
WATER LEAKS
LEAKING T&P
HOT WATER ODOURS (refer to
cathodic protection)
HOT WATER TOO HOT
WATER HEATER SOUNDS
SIZZLING - RUMBLING NOISE
SOOTING
BURNER WILL NOT STAY LIT-
GOES OUT 4-5 SECONDS
VENT GAS ODOURS
THERE IS NO WATER AT ALL
WHEN THE HOT WATER TAP IS
OPENED.
316888-001 Rev. 00 dRaFt Jun 28 245

TROUBLESHOOTING

Possible Cause(s)
STANDBY button turned off.
No power at outlet.
Error Code being displayed
Set point set too low.
Heater undersized.
Low gas pressure
Incoming water is usually cold.
Leaking hot water pipes of fi xtures.
Water on the fl oor under heater.
Improperly sealed, hot or cold supply
connections, relief valve, drain valve
or thermostat threads.
Leakage from other appliances or
water lines.
Condensation of fl ue products.
Thermal expansion in closed water
system.
Improperly sealed valve.
High sulfate or mineral content in
water supply.
Bacteria in water supply.
Thermostat set too high.
Condensation dripping on burner.
Sediment at bottom of heater tank.
Improper combustion.
High ambient room temperature.
Defective Control board.
Damaged Flame Sensor
(Error code E35)
Lack of air supply.
Improperly installed vent piping.
Downdraft
Poor Combustion
The unit display is fl ashing an error
code.
TABLE 6
www.hotwater.com
What to do
Press switch to turn heater on.
Repair service to outlet.
Refer to "FAULT INDICATION AND
ERROR CODES" section and Table
5 or call service agency or dealer.
Adjust Set point higher.
Reduce hot water use.
Contact dealer.
Allow more time for heater to reheat.
Have plumber check and repair
leaks.
See CONDENSATE section.
Check for leaks. See Figure 40.
Inspect other appliances near water
heater.
Refer to CONDENSATE section.
Install thermal expansion tank (Do
not plug T&P valve).
Check relief valve for proper
operation (Do not plug T&P valve).
Drain and fl ush heater thoroughly
then refi ll.
Chlorinate water supply.
Refer to TEMPERATURE
REGULATION section.
Refer to CONDENSATE above.
Clean sediment from tank. Refer to
DRAINING.
Refer to Air Requirements.
Contact a qualifi ed service agency to
determine cause.
Replace Control board.
Replace Flame Sensor
Shut off water heater immediately
and contact a qualifi ed service
agency to determine cause.
Check if there is any error code
fl ashing on the remote controller.
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