Truma aquago issue

[Hivoltage98]

I purchased my aquago about a year ago and have nothing but great things to say about the unit. We were camping this weekend and I started getting the inside control unit flashing 2 times. I checked the code on the outside unit and read the blinks. It was a code 33 in the truma manual. I called truma and all the techs were busy so I left a message. They called me later and a very nice woman helped me. I never could register my truma warranty for some reason and she helped me. I explained to her what happened and she said some boards have a glitch in them. They are sending me a new board and return postage to send me the old board back. The truma still works perfectly fine just flashes saying hi current in the antifreeze kit.