![]() ![]() Examine the wires that connect the display to the computer.Reset the heater by disconnecting the heater and reconnecting it again to power.Here are the steps you need to take to get rid of this error code. The CE error code on the Hayward pool heater means that the control module and the display interface assembly aren’t communicating properly as they should. You may need to replace the transformer too if it is defective.Replace the Control Module if everything is in order. Measure the voltage across pins 1 and 3 of the Plug on Harness for 120 volts. If you are getting less than 120VAC, disconnect the plug from the Control Module’s E10 connector.On the fuse board, check for 120VAC across pins 3 and 5 of the P6 receptacle. Disconnect the plug from the Fuse Board’s P6 connector.You need to make sure that it isn’t open. There is a fuse labeled ‘FC4’ in the fuse board.To fix this issue you need to take care of the following components. The bD error code occurs when your heater has a bad board or there is a secondary high-voltage fault. If nothing has helped, you need to replace the blower vacuum switch. The control module relay is malfunctioning if 120VAC is not provided. Step 5: Measure 120VAC along pins 1 and 2 during the pre-purge period. To generate a call for heat, lower the set point temperature. Set the heater to the Pool or Spa setting. Step 4: Disconnect Blower connector from the Control Module. The blower is malfunctioning if the measured values differ significantly from these levels. Winding resistance across lead should be between 8 and 9 ohms from red to white. Measure the resistance in the windings of the blower. Step 3: Disconnect the blower connector from the Control Module. Make sure the blower’s plug is securely secured to the control module. Step 2: Examine the wiring for the blower. Ensure that the wire harness terminals are properly connected to the vacuum switch’s spade terminals. ![]() Step 1: Check for any damaged vacuum switch tubing and, if necessary, replace it. To make the error code go away, follow the instructions below. When the error is repaired, the system automatically resets. The device will go into lockout mode with the blower operating if the switch is not closed after the blower starts. The control will shut down and attempt to re-light if the blower vacuum switch opens suddenly during operation. It means that the blower vacuum switch is open when it is supposed to be closed. The AO code is basically the opposite of AC code. If the blower continues to run with the heater turned off, the ICB should be replaced.Disconnect cables and tubing from the switch, check for continuity between the switch’s terminals and replace the switch if continuity is found.Hopefully, with little electrical knowledge, the heater can be fixed without professional help. ![]() Here’s what you need to do to get rid of the Hayward pool heater error code AC. Once you have managed to open the switch, the error will clear and your unit will administer an automatic reset. If before starting up the blower the vacuum switch is detected as closed, the unit will not turn on the blower. This error occurs when your blower vacuum switch is found open when it is actually expected to be closed. Error Codes Error Codes Meaning AC Blower vacuum switch open AO The blower vacuum switch closed bD Bad board or secondary high voltage fault CE There’s an error in communication between the Display Interface Assembly and Control Module EE Bad board HF Flame present with gas valve not energized HS Maximum return water temperature exceeded/or rapid water temperature rise IF Ignition failure IO Ignition circuit open LO Vent pressure switch, water pressure switch, or temperature limit switch fault PF Voltage polarity reversed or low voltage detected SB Keypad failure SF Temperature sensor input failure bO Bypass operation 1. Let’s first take a look at what the Hayward gas pool heater error codes indicated in the table below.
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