If your CleaverBrooks Boiler experiences no ignition, possible causes include: a lack of spark due to a grounded electrode, cracked porcelain, improper electrode setting, loose terminal on the ignition cable, shorted cable, inoperative ignition transformer, or insufficient voltage at the pilot ignition circuit terminal. Alternatively, there may be a spark but no flame due to a lack of fuel, inoperative pilot solenoid, insufficient voltage at the pilot ignition circuit terminal, or too much air. Other potential issues are an open low-fire switch, defective combustion or atomizing air proving switches, a motor starter interlock contact not closed, or a defective flame detector with an obstructed sight tube or dirty lens. Check the damper motor and linkage. Inspect the interlock circuit.
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Danielle ReyesAug 13, 2025
Why CleaverBrooks CBLE burner does not start?
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cheryl04Aug 13, 2025
If your CleaverBrooks Boiler burner does not start, there are several potential causes. First, ensure there is voltage at the program relay power input terminals by checking the main disconnect switch, replacing any blown control circuit fuses, and repairing any loose or broken electrical connections. Second, the program relay safety switch may require resetting. Third, the limit circuit may not be completed; verify pressure and temperature settings, ensure the water level is adequate, and check fuel pressure. For oil-fired units, confirm the burner gun is in the full forward position and, for heavy oil-fired units, ensure the oil temperature is above minimum settings. Finally, check the fuel valve auxiliary switch to ensure the fuel valve interlock circuit is completed.
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wilsondeniseAug 17, 2025
What to do if CleaverBrooks CBLE has pilot flame, but no main flame?
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andrearodriguezAug 17, 2025
If the CleaverBrooks Boiler has a pilot flame but no main flame, it could be due to several reasons. First, the pilot flame might be insufficient and require adjustment. If it's a gas-fired unit, check that the manual gas cock is open and inspect the main gas valve and gas pressure regulator for proper operation. For oil-fired units, ensure the oil supply isn't cut off, the supply pump is working, and there is sufficient fuel; also, check the main oil valve, oil nozzle, gun, and lines. Additionally, the flame detector could be defective, the sight tube obstructed, or the lens dirty, requiring cleaning or replacement. Finally, check the voltage at the main fuel valve circuit terminal to ensure it's sufficient.
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