Masterdragon

I have a Prosun Luxura we bought used. Basically we got ripped off. But anyway...Had to have the circuit boards repaired. When we did the only way to turn the bed on was to turn a small switch on the left side circuit board one way, then set the timer on the bed, then turn the switch back the other way and then you could start the bed. We have been doing this for awhile now with no problems except for the hassle of lifting the bed to get to the switch inside the bed. My wife came into the room where the bed is and the fans were running. Apparently came on by themselves. She unplugged the bed. Waited and plugged it back in. Now we get an error that reads: "overtemp 3" and the bed won't do anything. Any help would be appreciated.