TROUBLESHOOTING – SERVICE TIPS
13. TROUBLESHOOTING – SERVICE TIPS
Problem | Possible Cause | Suggested Remedy | |
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| Defective Thermocouple | Replace | |
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| Heavy Draft Blowing across Pilot | Redirect Air Movement or Eliminate | |
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| Plugged Pilot Orifice | Replace Orifice | |
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Pilot Outage |
| Check Manual Pilot Valve | |
| No Gas | Check Main Gas | |
| Check Manual Meter Valve | ||
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| Consult Gas Company | |
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| Defective Thermopilot Valve | Replace | |
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| Defective Ignition Control | Replace | |
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| No Power | Check Power Source with Meter | |
| Check Fuses | ||
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| Defective Gas Valve | Replace | |
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| Defective Thermocouple | Replace | |
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| Low Water Level in Boiler | Check for Leaks | |
Main Gas Valve Will Not Open | or System Causing Low Water | Check Feeder (if Supplied) | |
(Standard |
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Defective Thermopilot Valve | Replace | ||
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| Defective Ignition Control | Replace | |
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| High Gas Pressure Switch Open | Check Switch Setting | |
| (if Provided) | Check Manifold Gas Pressure | |
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| Low Gas Pressure Switch Open | Check Switch Setting | |
| (if Provided) | Check Manifold Gas Pressure | |
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| No Power | Check Power Source with Meter | |
| Check Fuses | ||
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| Defective Gas Valve | Replace | |
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| Relay Locked Out on Safety | Check for Pilot Outage | |
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| Pilot Out | Relight Pilot | |
| (May have defective pilot valve or relay) | ||
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Main Gas Valve Will Not Open | Defective Relay | Replace | |
(Electronic Standing Pilot System) | Low Water in Boiler | Check for Leaks | |
| or System Causing Low Water | Check Feeder (if Supplied) | |
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| Defective Thermopilot Valve(s) | Replace | |
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| Defective Thermocouple(s) | Replace | |
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| High Gas Pressure Switch Open | Check Switch Setting | |
| (if Provided) | Check Manifold Gas Pressure | |
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| Low Gas Pressure Switch Open | Check Switch Setting | |
| (if Provided) | Check Inlet Gas Pressure | |
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| Air Adjustment Screws Turned in Too Far | Adjust Screws Out | |
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| Low Gas Pressure in Manifold | Adjust Main Gas Pressure Regulator | |
| (Insufficient Air Injection) | or Check Line Pressure | |
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| Burner Ports Partially Closed (Rust, Dirt, Lint, etc.) | Replace Burners or Clean Ports | |
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Burner(s) Burning with Yellow Flame |
| Check Size of Combustion Air Openings to | |
| Insufficient Air for Combustion | Room, if Undersized, Correct as Required | |
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| Check for Negative Pressure in Boiler Room | |
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| Oversized Burner Orifice | Install Correct Orifice | |
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| High Gas Pressure in Manifold | Adjust Main Gas Pressure Regulator | |
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| Insufficient Draft – Chimney Too Low | Increase Height or Add Induced Draft Fan | |
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| Insufficient Draft – Chimney Too Small | Replace Chimney or Add Induced Draft Fan | |
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Gas Spillage from | Insufficient Draft – Blockage in Chimney or Vent | Repair Chimney or Vent | |
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Insufficient Draft – Downdraft Caused by |
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Draft Hood Relief Opening |
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Chimney Location with Respect to | Install Chimney Cap | ||
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| Other Buildings, Roofs, etc. |
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| Negative Pressure in Boiler Room | Remove Exhaust Fan | |
| (Due to Exhaust Fan or Duct System) | or Isolate Fan From Boiler Room | |
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| Insufficient Combustion Air Openings | Provide Correctly Sized Combustion and | |
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| Ventilation Air Openings |
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