Through much internet research I was able to narrow down the problem to either the water inlet valve or the water filter housing/manifold. Because the filter housing hoses feed into the inlet valve, we decided to replace both at the same time instead of troubleshooting just one and then having to pull it all apart a second time if we guessed wrong. The videos provided on your website were extremely helpful, thank you! Obviously since the door is open when making the housing repair, the temperature went from 37 to 43 degrees. An hour after everything was back up and running it had only dropped 1 degree, but after 6 hours it was back to normal...so be patient.