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> Re the foam, what kind of foam do you need and where can it be purchased?
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There is a 3M product made for the job. I don't know what it is, but if you
need it and give me a few days I could find out. I imagine parts stores
could get hold of something similar. It doesn't have to be identical to
original, just similar to make a seal.

I sed craft foam from Micheals craft store about ten or twelve hears ago
and it's fine. It comes in a thin sheet, about 1/16th, which is what you
want. Too think and it won't seal well.

I have also heard of using thin packing foam that electronics sometimes
come wrapped in.

In any event, the application is simple. Take out the little inserts (hard
to describe, you'll know them when you see them) that hold the long rods
with flaps in place. Pull them out of the heater box, marking CAREFULLY
which is which and which way it goes. Pop off the plastic clamping strips,
being careful not to damage them. This is how the foam is affixed. You will
need them all. I have a spare full set if anyone needs any. cut the foam to
shape, and reinstall, snapping the clamping strips down to hold it in
place. Reinstall the long rods and you are good to go.

Jim