We have had great luck with these boards. Much more reliable than factory original board.

I’ll start by saying I am not a professional installer or system technician, just a regular mechanically inclined do it yourself type person. I have a cabin cruiser boat with a Dometic Cruisair Stowaway Turbo STQ8-410A and I bought this board to replace my Q-logic 4240800 which was determined to be unrepairable by Flight Systems Inc. out of Mechanicsburg, Pennsylvania. Installation was fairly easy. Some of the terminals lined up the same as the old board and some I had to cross reference with the previous boards, terminal locations against the terminal block. The one gotcha I encountered was that the new board didn’t come with the pin jumper like it shows in the picture (lower right corner). After initially powering on the system, I noticed there were heating and cooling options that I hadn’t seen with the previous board and my AC nor heat would not kick on and the board immediately threw a 1L error code. After talking to support, they indicated that my system did not have seawater sensors, and the system was looking for that and throwing the error. After jumpering (connecting) the two pins the system began operating normally. I don’t know if the new board should have come with the jumper or not but in my scenario, I wish it had as it would have saved me a lot of grief. Overall, I am very happy with this board and I hope this review helps other do-it-yourself folks like myself!