I agree with Spatech as it does have the symptoms of an air lock. Open the drain valve, unscrew the filter cap, run the water hose as far down as it will go, turn the water hose on full blast. Turn off the breakers and reset them one at a time, 20 amp first, then the 30 amp.
If this doesn't do the trick, let the dealer have a look at it.
I wish you well!
Terminator