A.O. Smith GCV Series Service Handbook page 6

PROBLEM POSSIBLE CAUSE
WATER LEAKAGE:
Thermostat does not shut-off
Drain valve dripping/leaking
Tank Leak
TEST / CORRECTIVE ACTION
Check the Gas Control Valve/Thermostat as
described on p. 20-21.
Back fl ush to clean- out sediment, replace if
necessary
Check Leakage Checkpoints described on
p. 25.
6