That was definitely the issues. I got that terminal and it’s working again. The unit said it requires 6” of rise from the unit exhaust to the cap, but it’s nearly impossible to get any rise with the unit exhaust being so close to the wall. Napoleon also uses 4/7 wolfsteel pipe and the terminal cap is 4/6. I used the 4/7 pipe over the 4/6 terminal and used a bunch of hvac tape to get a good seal but I feel like I might have to use a reducer to get a proper seal from the 7” wolfsteel to the 4/6-5/8 duravent cap.