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LENNOX HEARTH PRODUCTS • MONTEBELLO®
Troubleshooting the MONTEBELLO™ LSM40ST FIREPLACE
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 accomplished by a qualified service technician.
| Symptom | Possible causes |
| Corrective action |
1. | Nothing happens when fireplace | A. Remote is not functioning properly. | • | Check that the wall switch plate is set to remote |
| is turned On/Off. |
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| (if remote was used). |
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| • | Operate the fireplace from the wall plate switch. |
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| • | Replace remote and/or receiver batteries. |
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| B. Gas is not reaching the fireplace. | Check the gas supply and gas shutoff valves. | |
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| C. Unit is not receiving power. | • | Check/replace backup batteries behind wall plate. |
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| • | Check building circuit breakers to ensure power |
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| is on to the fireplace. |
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2. | The main burner does not light, | A. Gas is not reaching the fireplace. | Check the gas supply and gas shutoff valves. | |
| and the igniter is sparking. |
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| B. Loose wires to the valve. | Check control compartment for any obvious loose | ||
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| wiring (call a service technician if required). | |
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| C. Loose wires to ignition module. | Check control compartment for any obvious loose | |
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| wiring (call a service technician if required). | |
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| D. Air in the gas line. | Call a service technician. | |
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3. | The main Burner comes on, | A. Gas is not reaching the fireplace. | Check the gas supply and gas shutoff valves. | |
| but then goes out. |
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| B. Loose wires to valve or ignition module. | Check control compartment for any obvious loose | ||
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| wiring (call a service technician, if required). | |
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| C. Pilot flame is not engulfing the 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 glass. | A. Excessive flame impingement on logs. | Check for proper log placement. | |
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| B. Improper air shutter opening. | Open the air shutter by pulling on the air shutter | |
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| adjustment lever. | |
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