TROUBLESHOOTING
For your safety, water heater service should be performed only by a qualified service technician.
Read the GENERAL SAFETY INFORMATION section first.
PROBLEM
POSSILBE MALFUNCTION
SERVICE TO BE PERFORMED
| 1) Blower will not run. |
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| A) "ON/OFF" control switch turned off. | Turn switch to the on position. | |
| B) Blower unplugged. | Plug blower back into 115 vac. outlet. | |
| C) No power at outlet. | Repair service to outlet. | |
| D) "ON/OFF" switch defective. | Replace switch. | |
| E) Control harness defective. | Replace control harness. | |
| F) Blower motor defective. | Replace blower and motor. | |
| 2) Blower running, burner not on | Replace switch. | |
| A) Fan not running fast enough to close | Check for low voltage, less than 102 vac., | |
| air switch contacts. | have service checked and repaired. | |
| B) Air pressure switch defective. | Replace switch. | |
| C) Gas valve defective. | Replace gas control valve/ thermostat. | |
NOT ENOUGH OR NO HOT WATER | D) Control harness defective. | Replace harness. | |
E) Igniter defective. | Replace ignitor. | ||
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| F) Unit has completed three trials to light | Reset cycle by turning switch off and then | |
| and fail. | back on. If unit does not light in three tri- | |
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| als, contact a qualified person for service. | |
| 3) Thermostat problems |
| |
| A) Thermostat set too low. | Set temperature control higher. | |
| B) Thermostat or ECO defective. | Replace gas control valve/thermostat. | |
| C) High limit control circuit open. | Replace high limit control. | |
| 4) Others |
| |
| A) Heater undersized. | Reduce hot water usage. | |
| B) Low gas pressure. | Contact a qualified person for service. | |
| C) Incoming water is unusually cold. | Allow more time for heater to | |
| D) Leaking hot water pipes or fixtures. | Have plumber check and repair leaks. | |
CONDENSATION | A) Water on the floor under heater. | See "Condensation" | |
| Improperly sealed, hot or cold supply | Turn off heater & water, repair unit. | |
| connections, relief valve, drain valve or |
| |
WATER LEAKS | thermostat threads. |
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Leakage from other appliances or water | Inspect other appliances near water | ||
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| lines. | heater. | |
| Condensation of flue products. | Refer to "CONDENSATION" | |
| Thermal expansion in closed water sys- | Install thermal expansion tank (DO NOT | |
LEAKING T&P VALVE | tem | PLUG T&P VALVE) | |
Improperly seated valves | Check relief valve for proper operation | ||
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| (DO NOT PLUG T&P VALVE) | |
HOT WATER ODORS OR COLOR | High sulfate or mineral content in water | Drain and flush heater thoroughly, chlori- | |
supply or iron or sulfate reducing bacteria | nate, refil and flush again then chlorinate | ||
(Refer to CATHODIC PROTECTION) | |||
in water supply | water supply. | ||
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