Symptom | Possible Cause | Corrective Action |
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3. (Continued) | b. Thermopile may not be | Check the thermopile with a millivolt meter. |
| generating sufficient | Take the reading at |
| millivoltage | of the gas valve. The meter should read |
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| 325 millivolts minimum, while holding the |
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| valve knob depressed in the pilot position, |
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| with the pilot lit, and the ON/OFF switch |
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| in the OFF position. Replace the faulty |
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| thermopile if the reading is below the |
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| specified minimum. |
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| With the pilot in the ON position, disconnect |
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| the thermopile leads from the valve. Take |
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| a reading at the thermopile leads. The |
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| reading should be 325 millivolts minimum. |
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| Replace the thermopile if the reading is |
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| below the minimum. |
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| c. Defective valve | Turn the valve knob to the ON position. |
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| Place the ON/OFF switch in the ON |
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| position. Check the millivolt meter at the |
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| thermopile terminals. The millivolt meter |
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| should read greater than 125mV If the |
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| reading is acceptable, and if the burner |
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| does not come on, replace the gas valve. |
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| d. Plugged burner orifice | Check the burner orifice for stoppage. |
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| Remove stoppage. |
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| e. Wall switch or wires are | Follow the corrective action in Symptom |
| defective | and Possible Cause 1. a. above. Check |
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| the switch and wiring. Replace where |
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| defective. |
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4. Frequent pilot | a. Pilot flame may be too | Clean and adjust the pilot flame for maximum |
outage problem. | high or too low, or blowing | flame impingement on thermocouple. |
| (high), causing pilot safety | Follow lighting instructions carefully. |
| to drop out |
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42 | Heat & Glo • |