Hi. Tried multiple times to take cover off and on again. I have not lubed the gasket , I can try that. Replaced in the first place because it was leaking and the original gasket showed ware and potentially pinched when initially installed.Did you put Pool Lube on the gasket? Pool Lube - Further Reading
Is the gasket laying flat?
Is everything spotless clean where the gasket lies?
Does the gasket have any knicks or imperfections?
Did you over tighten the screws and deform the gasket?
Open it up, clean it up, check the gasket, lube the gasket, reassemble, and see how it works.
Why did you need to replace the gasket to begin with? Did the heater overheat and warp the manifold?
Original out of place and pinched could have warped cover. Take it off and check with a straight edge or face down on flat surface and see if piece of paper will slide under a corner or edge.Replaced in the first place because it was leaking and the original gasket showed ware and potentially pinched when initially installed.
Thanks
Chris
Yeah. I’m thinking that may be the issue now. Lub the gasket did not help. It’s right at the lower screw where two pieces of plastic come together. Now how to fix …Consider looking for cracks with a magnifier. Flex plastic parts in many directions to see if anything opens up. For metal, try coloring surfaces with a Sharpie. Gently polish off the ink with ~2000 grit paper. Remaining fine lines are suspect.