TROUBLESHOOTING
Note: Before troubleshooting the gas control system, Ensure external gas shut off valve, located at gas supply inlet, (and wall switch, iff applicable), is in the “ON” position.
Important: Valve system troubleshooting should only be accomplished by a qualified service technician.
| TROUBLESHOOTING GUIDE - Millivolt GAS CONTROL SYSTEM | ||
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| SYMPTOM | POSSIBLE CAUSES | CORRECTIVE ACTION |
1. | Spark igniter will not light pilot after | A. Defective igniter | Check for spark at electrode and pilot; if no spark and |
| repeated triggering of igniter button. | (no spark at electrode). | electrode wire is properly connected, replace igniter. |
| WARNING: if the pilot will not light | B. Defective or misaligned electrode at pilot | Using a match, light pilot. If pilot lights, turn off pilot |
| (spark at electrode). | and trigger the igniter button again. If pilot lights, an | |
| after 1 minute of attempting, wait | ||
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| improper gas mixture caused the bad lighting and a | |
| for at least 5 minutes for gas to |
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| longer purge period is recommended. If pilot will not | |
| clear before attempting again. |
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| light – check gap at electrode and pilot – should be 1/8" | |
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| to have a strong spark. If gap measures 1/8", replace |
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| pilot (see Figures 12 or 13 on Page 11). |
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| C. Gas supply pressure errant. | Check inlet gas pressure. It should be within the limits |
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| as marked on the rating plate. |
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| D. Pilot orifice plugged. | Clean or replace pilot orifice. |
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2. | Pilot will not stay lit after | A. Defective pilot generator | Check pilot flame, it must impinge on thermocouple |
| carefully following the lighting | (thermocouple). | (see Figures 12 or 13 on Page 11). Clean and/or |
| instructions. |
| adjust pilot for maximum flame impingement on |
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| thermocouple. Ensure that the connection between |
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| the valve and thermocouple are tight and secure. |
3. | Pilot burning, no gas to burner, Valve | A. Wall switch or wires defective. | Check wall switch and wires for proper connections. |
| knob “ON,” and the (standard) burner |
| Jumper wire across terminals at wall switch, if burner |
| OFF/ON switch is “ON." Read impor- |
| comes on, replace defective wall switch. If okay, jumper |
| tant note below. |
| wires across wall switch wires at valve, if burner comes |
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| on, wires are faulty or connections are bad. |
| IMPORTANT NOTE: If an optional | B. Thermopile may not be generating suf- | Check thermopile with millivolt meter. Take reading |
| ficient millivolts. | at thermopile terminals of gas valve. Should read | |
| *remote switch is used for burner | ||
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| 325 millivolts minimum with optional wall switch | |
| operation, if the standard burner |
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| “OFF.” Replace faulty thermopile if reading is below | |
| OFF/ON switch is still installed on |
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| specified minimum. | |
| appliance it must be in the "OFF" |
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| position. | C. Plugged burner orifice. | Check burner orifice for blockage and remove. |
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| *Optional remote switch kits - wall |
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| D. OFF/ON Switch & *Remote Switch are in | When turning on the burner using a *remote switch, | |
| switch, wall thermostat or remote | the "ON" position resulting in excessive | ensure that the standard OFF/ON switch is in the "OFF" |
| control. | resistance. | position. If both switches are in the ON position, it |
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| may result in excessive resistance (& millivolt drain- |
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| age) and the burner may not come on. |
4. | Frequent pilot/burner outage prob- | A. Pilot flame may be too low or blowing (high) | Clean and/or adjust pilot flame for maximum flame |
| lem. | causing the pilot/valve safety to drop out. | impingement on thermocouple (see Figures 12 or |
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| 13 on Page 12). |
| TROUBLESHOOTING GUIDE - ELECTRONIC IGNITION SYSTEM | |||
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| SYMPTOM | POSSIBLE CAUSES | CORRECTIVE ACTION |
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1. | Burner will not light. | A. Faulty Valve System. | See Below. |
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| B. “OFF/ON” or wall switch defective. | Disconnect the two black wires from the wire nuts. |
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| Test switch(s) for continuity with a multimeter. If |
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| continuity is not indicated, switch(s) is defective and |
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| must be replaced. |
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| Note: Before replacing “OFF/ON” switch, Ensure to |
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| check wiring for loose connections or broken wires |
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| and repair as needed. |
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2. | Burners come “ON,” then turns “OFF.” | A. Burner orifice plugged. | Check main burner orifice(s) for blockage. Clean |
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| or replace. |
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| B. Obstructed vent system. | Check vent system for obstructions. |
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| NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. | 21 | |