10 Troubleshooting
With proper installation, operation, and maintenance your gas appliance will provide years of
Symptom | Possible Cause | Corrective Action |
1. After repeated trig- | a. Defective ignitor. | Check the spark at the electrode and pilot. If no spark and electrode |
gering of the piezo |
| wire is properly connected, replace the ignitor. |
button, the spark ignitor |
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b. Defective pilot or | Using a match, light the pilot. If the pilot lights, turn off the pilot and trig- | |
will not light the pilot. | misaligned electrode | ger the piezo button again. If the pilot lights, an improper gas/air mixture |
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| (spark at electrode). | caused the bad lighting and a longer purge period is recommended. If |
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| the pilot will not light, ensure the gap at the electrode and pilot is one- |
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| eighth (1/8) inch to have a strong spark. If the gas is OK, replace the |
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| pilot. |
| c. No gas or low gas | Check the remote |
| pressure. | valve near the gas main. There can be more that one (1) valve from the |
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| appliance and the main. |
| d. No LP in tank. | Check the LP (propane) tank. You may be out of fuel. |
2. The pilot will not stay | a. Defective thermo- | Check that the pilot flame impinges on the thermocouple. Clean and /or |
lit after carefully follow- | couple. | adjust the pilot for maximum flame impingement. |
ing the lighting instruc- |
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tions. |
| Ensure that the thermocouple connection at the gas valve is fully |
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| inserted and tight (hand tighten plus 1/4 turn). |
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| Disconnect the thermocouple from the valve, place one millivolt lead |
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| wire on the tip of the thermocouple and the other meter wire on the ther- |
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| mocouple copper lead. Start the pilot and hold the valve knob in. If the |
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| millivolt reading is less than 15mV, replace the thermocouple. |
| b. Defective valve. | If the thermocouple is producing more than 15 millivolts, replace faulty |
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| valve. |
3. The pilot is burning, | a. ON/OFF switch or | Check the ON/OFF switch and wires for proper connections. Place the |
there is no gas to the | wires defective. | jumper wires across the terminals at the switch. If the burner comes on, |
burner, the valve knob is |
| replace the defective switch. If the switch is OK, place the jumper wires |
in the ON position, and |
| across the switch wires at the gas valve. IF the burner comes on, the |
the ON/OFF switch is in |
| wires are faulty or connections are bad. |
the ON position. |
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b. Thermopile may | If the pilot flame is not close enough physically to the thermopile, adjust | |
| not be generating | the pilot flame. |
| sufficient millivoltage. | Be sure the wire connections from the thermopile at the gas valve ter- |
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| |
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| minals are tight and that the thermopile is fully inserted into the pilot |
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| bracket. |
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| Check the thermopile with a millivolt meter. Take the reading at TH- |
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| TP&TP terminals of the gas valve. The meter should read 325 millivolts |
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| minimum, while holding the valve knob depressed in the pilot position, |
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| with the pilot lit, and the ON/OFF switch in the OFF position. Replace |
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| the faulty thermopile if the reading is below the specified minimum. |
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| With the pilot in the ON position, disconnect the thermopile leads from |
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| the valve. Take a reading at the thermopile leads. The reading should |
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| be 325 millivolts minimum. Replace the thermopile if the reading is |
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| below the minimum. |
September 1, 2008 | Page 41 |