LENNOX HEARTH PRODUCTS • MONTEBELLO®
Troubleshooting GUIDE: ELECTRONIC GAS CONTROL SYSTEM
Note: Before troubleshooting the gas control system, make sure the external gas shutoff valve (located at gas supply inlet) is in the “ON” position.
Important: Valve system troubleshooting should only be performed by a qualified service technician.
| Symptom | Possible causes | Corrective action |
1. | Nothing happens when fireplace | A. Remote Control is not functioning | • Check that wall switchplate is set to REMOTE |
| is turned On/Off (pilot does not | properly. | (if remote was used). |
| spark). |
| • Operate fireplace from wall switchplate. |
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| • Replace batteries in Remote Control and/or Receiver. |
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| B. Gas is not reaching fireplace. | • Check gas supply and gas shutoff valves. |
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| C. Unit is not receiving power. | • Check building circuit breakers to ensure power |
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| is on to fireplace. |
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| D. Damaged igniter wire. | • Check for visible cracked casing, cuts, etc. |
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| E. Damaged pilot assembly. | • Check pilot assembly for visibly broken spark electrode, etc. |
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| F. Batteries low. | • Check voltage on D.C. terminal of batteries in Remote Control. |
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| The value should be around 3.0V. |
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2. | Igniter is sparking, but main | A. Gas is not reaching fireplace. | • Check gas supply and gas shutoff valves (call a service |
| burner does not light. |
| technician, if required). |
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| B. Air in gas line. | • Call a service technician. |
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| C. Loose wires to valve. | • Check control compartment for any obvious loose wiring |
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| (call a service technician, if required). |
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| • Ensure blue and white (2) wires are securely connected to |
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| valve (call a service technician, if required). |
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| D. Loose wires to ignition module. | • Check control compartment for any obvious loose wiring |
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| (call a service technician, if required). |
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| E. Loose sensor wire. | • Ensure sensor wire connection is secure to purple wire of |
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| ignition control (call a service technician, if required). |
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| F. Low voltage. | • Test voltage at AC terminals of module for 24 VAC. If no volt- |
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| age, replace module (call a service technician, if required). |
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| • Check electrical connections between module and gas control. |
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| If okay, replace gas control (valve) (call a service technician, |
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| if required). |
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3. | Main burner comes on, | A. Gas is not reaching fireplace. | • Check gas supply and gas shutoff valves. |
| but then goes out. |
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| B. Loose wires to valve or ignition | • Check control compartment for any obvious loose wiring | |
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| module. | (call a service technician, if required). |
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| C. Pilot flame is not engulfing sensor. | • Call a service technician. |
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| D. Obstructed vent system. | • Call a service technician. |
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4. | Soot is present on logs and | A. Excessive flame impingement on logs. | • Check for proper placement of logs, volcanic stone, and |
| glass. |
| ember material. |
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| B. Improper air shutter opening. | • Check for proper air shutter adjustment (call a service |
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| technician, if required). |
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