TROUBLESHOOTING
15
TROUBLESHOOTING
WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater.
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
Pilot will not stay lit | 1. | Defective thermocouple | 1. | Check pilot flame. It must impinge on |
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| thermocouple |
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| 2. | Clean or adjust pilot for maximum flame |
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| impingement on thermocouple |
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| 3. | Ensure the connection between valve |
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| and thermocouple are tight and secure |
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| 4. | Check thermocouple with millivolt |
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| meter. Take reading at thermocouple ter- |
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| minals of gas valve with remote control |
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| off. It should read 18 millivolts mini- |
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| mum. Replace faulty thermocouple if |
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| reading is below specified minimum |
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Pilot lit but no flame on burner | 1. | Remote or wires defective | 1. | Check remote wires for proper connec- |
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| tions. Place jumper wire across termi- |
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| nals at remote control. If burner comes |
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| on, replace remote. If okay, place jumper |
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| wire across remote control at valve. If |
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| burner comes on, wires are faulty or con- |
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| nections are bad |
| 2. | Thermopile not generating sufficient | 2. | Check thermopile with millivolt meter. |
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| milivoltage |
| Take reading at thermopile terminals of |
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| gas valve with remote control off. It |
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| should read 325 millivolts minimum. |
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| Replace thermopile if reading is below |
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| specified minimum |
| 3. | Plugged burner orifice | 3. | Check burner orifice for stoppage and |
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| remove |
Frequent pilot outage | 1. Pilot flame may be too low or blowing |
| (high) causing safety pilot to “drop out” |
1.Clean and/or adjust pilot flame for maximum flame impingement on thermocouple
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