Installed this product on my 2013 era Navien Ch-210 Natural Gas combination Boiler that was giving me error code 35e. I will say make sure it’s level in its proper position when you install it otherwise you will get the error code again. Once I put it back and screwed it in it’s original position (in this boiler, bottom right screwed into the back wall of the boiler) it worked flawlessly and has been there more than a week with no issues. I will be purchasing a new boiler in the future but so far this part has rectified my problem.