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Re: Our great lakes spa digital display flashes ''OH''...
Sound like you probably have a bad temperature sensor, or high limit sensor. "OH" usually means overheat and will shut the heater off. Have the sensors tested and go from there.
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If you need control system operation assistance, find out the mfg'r and locate the proper numbers and search that way.
Spa manufacturer manuals are very difficult to get.
So what is your reported spa problem? Just kidding - I think your error message may be related to the lack of water. Turn power off, fill to proper water level and monitor. Report back.
If the SnS or Sn Message is Alternating with the Water Temperature on the Display, it is a Possible Sensors Out of Sync Message.
If the SnS or Sn Message is Blinking or Flashing OFF and ON without showing Water Temperature, it is a Verified Sensors Out of Sync Message.
OH MEANS OVER HEAT AND THE 5N WHICH IS ACTUALLY SN IS YOUR SENSOR SO IT WOULD NEED TO BE REPLACED SO YOULL NEED TO CALL A POOL AND SPA COMPANY FOR EXAMPLE..... HOTSTUFF SPAS&POOLS SALEM,OR
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