Section V. Troubleshooting | 29 |
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TROUBLESHOOTING (GENERAL)
Possible Cause | Remedy |
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Heater will not come on |
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| Check if electrical connections are |
Automatic ignition system fails | correct and securely fastened – |
| If YES, call serviceperson. |
Pump not running | Place pump in operation |
Pump air locked | Check for leaks |
Filter dirty | Clean filter |
Pump strainer clogged | Clean strainer |
Defective wiring or connection | Repair or replace wires |
Defective pressure switch | Replace switch |
Defective gas controls | Call serviceperson |
Turn switch to "ON" | |
Heater Short Cycling (Rapid On and Off Operation) | |
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Insufficient water flow | Clean filter and pump strainer |
Defective wiring | Repair or replace wiring |
Defective flow valve or out of adjustment | Call serviceperson |
Defective | Call serviceperson |
Heater Makes Knocking Noises,
make sure all valves on system are open.
Heater operating after pump has shut off |
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| Shut off gas supply and call serviceperson | |||
Heater exchanger scaled |
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| Shut off gas supply and call serviceperson | |||
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SERVICE | ||||||
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| Symptom | Cause/Cure |
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| 1. | Dead | A. Miswired |
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| B. Transformer bad |
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| C. | Fuse/Circuit breaker bad |
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| D. | Bad control |
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| 2. | Thermostat | A. | Miswired |
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| B. Bad thermostat no voltage at terminal |
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| 3. | Valve on, no ignition | A. | Defective ignitor |
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| B. | Miswired |
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| C. Bad control (check voltage at ignitor) |
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| 4. | Ignitor on, no valve action | A. | Valve coil open |
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| B. Open valve wire |
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| C. Bad control (check voltage) |
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| 5. | Flame okay during | A. Bad flame sensor |
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| Try For Ignition (TFI), | B. | Bad wires |
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| no flame sense (after TFI) | C. | Poor ground at burner |
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| D. Poor flame (check flame current) |
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Rev. E | P/N 472089 |
