I have a heatilator eco wins18 and i was wanted to remove one of the washers so i could get a tighter seal so i took the lock nut off and i see theres a keyway and a key. I tried prying a bit with various screw drivers and it wont budge. Do i need a puller for this? I was going to heat it with a torch but im afraid that uneven heat on the glass might crack it.
![Cant get latch apart Cant get latch apart](https://www.hearth.com/talk/data/attachments/319/319178-09d05ed4ff888d6bd5bb7807081be7f8.jpg)
![Cant get latch apart Cant get latch apart](https://www.hearth.com/talk/data/attachments/319/319178-09d05ed4ff888d6bd5bb7807081be7f8.jpg)