cool, thanks.Just wanted to remind you to seal up on both sides too (vertically)
You'll see what i mean when you get the cover plate off.
I think your problem will be solved after you do this.
It drove me crazy for a couple weeks.
I can see how important lots of insulation is now, I have some of my water jacket uncovered while trying to get this taken care of , and my blower has been running non-stop to keep up. Water temps get to about 165-170, but never to 180* with this 15* weather. I think once I get all my other projects finished I might pull off the siding and add 1-2" rigid foam insulation on top of the solar guard. I read about a guy who sprayed his with foam, but it costs too much ($400) and I want something removable. From the looks of it, I can pull off the sides, take a measurement, cut the foam, and stuff it in. I'll take my IR thermometer out and look for warm spots. Here is a guy who took the siding off his shaver:
Here it is with the spray foam: