What to do if the thermostat input is higher than threshold on my CAC / BDP BWBBAN000045 Boiler?
To address a thermostat input higher than threshold issue on your CAC / BDP Boiler, begin by verifying that the boiler functions correctly by jumping the yellow thermostat wires. If the boiler then works, the problem lies with the thermostat itself or its wiring; consider replacing the thermostat or the thermostat wires.
What to do if the damper end switch failed to open on my CAC / BDP BWBBAN000045 Boiler?
If the damper end switch fails to open on your CAC / BDP Boiler, check that the vent damper harness is connected to both the vent damper and the control board, ensuring it's not damaged. Also, check that the vent damper mechanism operates freely. Refer to Appendix B for additional details.
What to do if the damper end switch failed to close on my CAC / BDP BWBBAN000045?
If the damper end switch fails to close on your CAC / BDP Boiler, check that the vent damper harness is securely connected to both the vent damper and the control board, and that the harness is not damaged. Also, verify that the vent damper mechanism is operating freely. Refer to Appendix B for additional information.
What to do if my CAC / BDP BWBBAN000045 Boiler shows a soft lockout due to internal failure?
If your CAC / BDP Boiler displays a soft lockout due to an internal failure, check that all wiring is correct by referring to the wiring diagram. Additionally, ensure there is a good ground connection to the pilot bracket.
Why is flame sensed out of normal sequence on my CAC / BDP BWBBAN000045?
If the flame is sensed out of the normal sequence in your CAC / BDP Boiler, check the gas valve and ensure that all electrical connections are tight.
Why is flame sensed during post-purge in my CAC / BDP BWBBAN000045 Boiler?
If the flame is sensed during the post-purge cycle of your CAC / BDP Boiler, check the gas valve and ensure that all electrical connections are tight.
Why is flame sensed during pre-purge in my CAC / BDP BWBBAN000045 Boiler?
If the flame is sensed during the pre-purge cycle of your CAC / BDP Boiler, check the gas valve and ensure that all electrical connections are tight.
What does AC line frequency error mean on my CAC / BDP BWBBAN000045 Boiler?
If your CAC / BDP Boiler displays an AC line frequency error, some electric or electronic devices may be generating electromagnetic interference. Verify that none is present. Also, check the thermostat connection.
What causes flame rod shorted to burner ground in CAC / BDP BWBBAN000045?
If the flame rod is shorted to the burner ground in your CAC / BDP Boiler, check that the flame sense wire on the pilot assembly is not frayed or damaged. If it is, replace the pilot assembly, noting that these are high-temperature wires, and field repair should not be attempted. Also, check that there is no moisture collecting on the control board.
What to do if my CAC / BDP BWBBAN000045 Boiler has a hard lockout due to temperature above limit?
If your CAC / BDP Boiler experiences a hard lockout due to temperature exceeding the limit, verify water is circulating properly through the boiler. Also, ensure there is no air in the system. If the pressure relief valve has opened, it indicates a problem with water circulation. The root cause may lie in the hot water circulation. To check the sensor, scroll the display reading to 'bt' and hold the sensor bulb securely in your hand; it should display a temperature close to body temperature. If not, replace the sensor.
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