Giant GI-IM028 Owner's Manual page 15

TROUBLESHOOTING GUIDE
CONDITION
Fuse burns often.
Smoking wiring.
Service wires charred or hot.
Drain valve leaks.
Water drips from the
relief valve.
Water on the floor/drain pan.
Condensation.
Wet insulation.
Singing element.
Singing thermostat.
Traces of rust in
the hot water.
Rusty water.
Rotten egg smell.
Tank bulged.
CAUSE
Fuse contacts oxidized or fuse not
screwed in tight enough.
Power supply wiring is undersized.
Lightning/Power surge.
Low/High voltage.
Power supply wiring undersized.
Wiring connections are wrong.
Water heater not properly grounded.
Lightning/Power surge.
High voltage.
Short circuit.
Power supply wiring undersized.
Drain valve is open.
Defective drain valve.
Excessive water pressure.
Thermal expansion in a closed water
system.
Improperly seated relief valve.
Defective thermostat.
Defective relief valve.
Water discharge from the relief valve.
Element leaks.
Water heater leaks.
Water heater filled for the first time.
Heavy draws of hot water with very cold
refill water.
Water heater is undersized.
Leaking plumbing connections.
Leaking around heating element.
Water discharge from the relief valve.
Build up of mineral deposits on element.
Thermostat not flush with tank.
Wiring connections are loose.
Anode has been eaten away.
Water corrosion.
High sulfate or mineral content in water.
No relief valve installed.
Excessive water pressure.
Thermal expansion in a closed
water system.
REMEDY
Clean contacts and tighten fuse.
See Table 1 for correct wiring size.
Inspect/replace fuse, element, and thermostat.
Check with electrical utility and correct.
See Table 1 for correct wiring size.
See Figure 2 for correct wiring.
Properly ground the water heater.
Inspect/replace fuse, element, and thermostat.
Check with electrical utility and correct.
Locate short circuit and repair.
See Table 1 for correct wiring size.
Close the drain valve.
Replace with new drain valve.
Install a pressure reducing valve.
Install a suitable expansion tank on the cold water
supply line.
Check relief valve works properly and replace, if necessary.
Replace with new thermostat.
Replace with new relief valve.
See Pressure build-up in a water system (page 3).
Replace with new element.
Replace with new water heater
Let water heater warm up. Problem should go away. If it
persists, check all plumbing connections for leaks.
Let water heater warm up. Problem should go away. If it
persists, check all plumbing connections for leaks.
Install size of water heater that meets demand.
Locate leak and repair.
Tighten, clean, and smooth face of tank flange and
element gasket.
See Pressure build-up in a water system (page 3).
Clean element, replace with new element if necessary.
Install thermostat properly.
Locate, clean carefully, reconnect properly.
Replace new anode.
Replace with new water heater.
Change magnesium anode to an aluminum anode and
bleach water heater.
Install proper relief valve.
Install a pressure reducing valve.
Install a suitable expansion tank on the cold water
supply line.
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