Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: Hayward H400idl - AO Code

  1. Back To Top    #1

    Hayward H400idl - AO Code

    Hi guys, I have been amazed with the knowledge here. I have typically been able to find answers by looking long enough but I am stumped. Rather than give you a long drawn out story, I will try to hit the sequence of events in bullet style.

    October 2010
    -Heater blower was struggling to provide enough speed to satisfy the vac. switch. The heater would light after purge cycle but wouldn't run long. Motor was very hot.
    -Replaced blower
    -Heater ran perfectly until February 2011
    -Attempted to run heater while experiencing a cold front that put Houston temps into the 30s.
    -Heater would light but would only run for 2-3 minutes before going into a cool down cycle.
    -Once cool down was complete, the heater would immediately ignite and run again for 2-3 minutes.
    -Placed controls in service mode (to rule out something wrong with temperature/thermister and call for heat)
    -Heater still cycling short heat cycles
    -Pulled panel door, tapped gas valve, pressure switch and some other general fumbling around.
    -Heater ignited and ran for ~15 minutes.
    -Control panel breaker providing service to heater tripped.
    -Sub panel providing power to control panel breaker tripped.
    -Re-set breakers and attempted restart - No Dice

    -Pulled heater cover to check for burns or smoke Neither
    -Checked resistance across blower leads ~130 Ohms (tech manual for the IDLII called for 8-9 ohms.)
    -Replaced blower
    -Installed new blower, again, no dice
    -Checked pressure switch continuity while pumping water - fine
    -Checked continuity to verify vac switch was verified open when heater gets call for heat

    So, that is where I am, I am guessing that I am looking at an issue with the control module. I guess I will have to try to see if the blower is getting any power.

    Any other thoughts?

    Thanks in advance.

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Hayward H400idl - AO Code

    Welcome to TFP.

    Quote Originally Posted by Bloooze66
    Control panel breaker providing service to heater tripped.
    -Sub panel providing power to control panel breaker tripped.
    This part bothers me. To have two breakers trip simultaneously is usually bad news. Sounds like a catastrophic event. I suspect the control board failed and took a thing or two with it.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

    Re: Hayward H400idl - AO Code

    Is there any progress with your control module problem?

    If the board is trash, I'm looking for a board for parts.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts