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Stephanie PaulSep 13, 2025
What to do if my Hayward H400FDNASME displays 'Blower Vacuum Switch closed'?
- JJonathan JosephSep 13, 2025
If your Hayward Heater displays 'Blower Vacuum Switch closed', check the blower vacuum switch for issues.
What to do if my Hayward H400FDNASME displays 'Blower Vacuum Switch closed'?
If your Hayward Heater displays 'Blower Vacuum Switch closed', check the blower vacuum switch for issues.
Warns about the danger of electric shock and necessary precautions.
Covers initial checks for incoming power and voltage selector plug issues.
Guides through diagnosing and resolving issues related to open FC1 and F2 fuses.
Provides steps to troubleshoot open FC3 and F1 fuses, checking various components.
Outlines the process for diagnosing and resolving issues with an open FC4 fuse.
Details troubleshooting steps for when the service LED displays the 'BD' code.
Provides steps to resolve 'EE' or 'CE' service codes, focusing on communication and board issues.
Guides users through troubleshooting 'IO' and 'SB' service codes related to ignitor or keypad issues.
Explains how to diagnose and resolve 'SF' and 'HS' service codes related to sensor failures.
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