Pool heater error codes

We have a 5 year old max-e-therm 200 pool heater. I noticed this week that the heater is displaying two error codes after start up. The heater (when main power first turned on) will cycle through its normal pattern then go blank as normal. About 10-15 sec later it displays AD0 and AD1. The heater will turn on as normal (in both spa and pool modes) and temp adjustments work as well. However I am not able to shut the heater off with the button on the panel. I must use the main switch that controls power to the pool pump as well. Any input would be greatly appreciated.


  1. Aqua-tech Support


    Jonathan it sounds like you may have a bad membrane bad or bad control board. If all else fails contact our Service Support Desk to book a diagnostic and repair of your Sta-Rite Maxetherm heater.

  2. Mark Arkin


    Sta Rite Heater model sr400na has an error code r6.

    What does this mean?

    • Nigel


      R6 is the revision of the board Mark.

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