DURAWATT® ELECTRIC WATER HEATER
ELECTRIC WATER HEATER TROUBLESHOOTING GUIDE
TROUBLE | PROBABLE CAUSE | REMEDY | |
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| Thermostat(s) | Check to assure proper thermostat setting. | |
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| Contractors will not pull in | Check continuity between all three thermostats or pressure | |
| controls. Complete circuit. If one is open, it must be replaced. | ||
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| Control circuit switch is in OFF position | Close switch. (Turn to ON position) | |
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| Control circuit fuse blown | Isolate cause for failure and replace fuse. | |
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| Contractor(s) coil open | Check continuity. Replace coil if not a complete circuit. | |
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No hot water |
| Check for 120 volts to coil on first sequencer step. Allow ample | |
Time delay sequencer not operating | time for additional steps to energize. If steps do not energize in | ||
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| reasonable time, replace only the defective relay step. See | ||
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| wiring diagram. | |
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| Proportional sequencer not operating | Check for 120 volts to line connection (L) on sequencer. Check | |
| fuse for continuity. See wiring diagram. Consult factory. | ||
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| Low water cutoff open | Check for open circuit. Check water level in tank. Replace low | |
| water cutoff if defective. | ||
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| Heating elements | Check for open legs. (See table 2). | |
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| Heater not large enough to satisfy peak | Add booster or additional kw input. Consult local PVI | |
| demands | representative. | |
| Hot water lines not insulated | Add insulation; it will protect against heat loss and save on cost | |
| of operation. | ||
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Insufficient hot | Power fuse(s) blown | Check fuses for continuity. Replace if blown. If blown, determine | |
cause of break before replacing with same type fuse. | |||
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| Contractor(s) not closing | Check coil for continuity. If defective, replace. | |
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| Thermostat(s) not correctly set | Check to assure proper thermostat control setting. | |
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| Check for proper amperage draw. Check for proper ohm | |
| Element(s) not heating | resistance. Replace if defective. Consult factory. | |
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| (See table 1) | |
| Loose connections | Tighten all connections. If charred, replace wire with wire of | |
| same type and size. | ||
Burned or |
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| Remove contactor points and inspect. If dirty, clean with emery | ||
discolored wires | Dirty or pitted contactor points | ||
| paper. CAUTION: Point must remain flat. If pitted or burned, | ||
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| contractor points must be replaced. | |
Blown fuses | Loose connection. Defective element | Check all connections for tightness. Check ohm resistance in | |
electric elements. Replace. | |||
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High or low | Local utility | Check with local utility. | |
voltage | |||
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High or low | High or low voltage. Defective element | Check with local utility. Low amperage, check fuses, tighten | |
amperage | connections. Check ohm resistance on elements. | ||
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Wire burned |
| Tighten connection and replace wire. Isolate leaking water and | |
or melted at | Loose connections. Water leaking on elements | ||
repair. Replace wire with same type and size. | |||
element |
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