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  1. V

    Hayward H400 Heater won't turn on-no error code

    Thank you VERY much for your prompt reply! I researched it further and that keypad has been a quick replace item on Hayward heaters. VNG
  2. V

    Hayward H400 Heater won't turn on-no error code

    Hi - We are on our second Hayward heater. It is getting electricity as the standby light is lit. However, when I try to switch it to the pool, nothing happens. The light only stays on standby. The heater shows no error code. I unscrewed the four screws around the display panel but all...