![]() ![]() Pull the connector from P6 of the fuse board and make sure the voltage is 110-125 VAC across Pins 3 and 5.Remove the FC4 fuse to measure continuity.Here are the potential solutions to fix the BD error code: Here are the common reasons behind the BD error code: This code is a cause of worry as it signals a bad board. If the voltage is present and the blower is running fine, the blower vacuum switch must be replaced.The control board needs to be replaced if this voltage is not present.The voltage should be 110-125 VAC across pins 1 and 2 of the inducer in the Control Board.Check the voltage by generating a call for heat.Disconnect the blower plug from the control module.If the blower is out of resistance, it needs to be replaced.For models after 2010, the correct resistance is 4-5 ohms.For models before 2010, the correct resistance is 8-9 ohms.Disconnect the blower from the ICB and check the resistance.The voltage selector plug must be configured to the correct voltage.Check the vacuum switch wiring, tubing, hose barb, and connections.Solution:įollow this Hayward pool heater troubleshooting guide to fix the AO error code: The wrong voltage at the voltage selector plug. ![]() Here are the common reasons behind this AO error code: The AO error code represents that the blower vacuum switch is open. But, if you find your Hayward is still showing the IF code on display, then read our complete solution guide to Hayward pool heater IF code. Hopefully, doing the above fixing will bring your heater to functioning.
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