My latest fan saga.
A couple of weeks ago, I posted about trying to get Panasonic to commit to a fix. As discussed, they finally agreed to fix and the part was ordered. However, I was close to my already extended return window and went ahead and set up a return as far out as possible at the time, which was the 20th. While waiting for the official fix, I did try a home made fix using foam from HD. I got good results and was encouraged that the official fix would be the same or better.
However, I did get last week the official fix and watched the installer put the foam exactly where the Panasonic instructions indicated. Unfortunately, the noise now shifted to the left fan (facing the TV) and was louder then my homemade fix. Bummer! I did noticed the official fix had an air gap around the fan mount and the foam could actuality be seen looking at the fan mount. That did not seen right, but it was the "official" fix. So I had decided over the weekend to let the return take place as scheduled. And just give up.
However, the posts saying the reversal fan trick seem to help for some and was actually closer to my homemade fix, which had no air gap bewtwen the panel and fan mount. So thinking, maybe I had gotten lucky and did what reversing the fans are doing by using the more depth foam - i.e.closing the air gap. So Monday, I delayed one again the return to next Tuesday and got the old screw driver out for one more last attempt.
Facing the set, I moved the official Panasonic foam on the right fan outward to totally clearly the fan mount and allow better air flow. The way Panasonic had it would seem to make the fan a smaller fan size, since the foam protrudes into the fan air flow space and would seem to not let the blades pull as much air as it could. Probably minor, but def closer to the original intent of the fan.
On the now louder left fan, I moved out the one Panasonic strip to again clear the fan mount opening to allow better air flow. I also noticed it seem to close the air gap between the panel and fan mount somewhat. Hmm. And since the left fan has no heat producing components above it, I put a additional HD foam strip on the top- hopefully similar to what the right fan strips are doing and reducing the turbulences in a like manner as the right fan official fix.
I did not reverse the fans on either side, since I like the concept of the existing foam strips to direct the air movement directly to the panel vents and not risk the possibility of some leakage of hot air back into the panel cavity.
I put the panel back on and the left fan noise was much reduced again as the home fix. No change that I could hear on the right fan. I can just barely hear the fans again (like the home fix) and now can hear only the panel buzz as the only variable noise. This is good, since just normal plasma noise.
I guess I could try to see how the left fan would work without the new top HD foam piece, but I do like the idea that it might be pulling more hot air from the electronics below. Probably moot, but doubt if it hurts either.
Important edit: I completely forgot to add that since I did not want to remove the official Panasonic foam. I used electoral tape to seal off any air gaps around the shorter Panasonic foam. This makes the official Panasonic fix equivalent to my original home fix and is probably the reason for the major noise reduction.
Sorry late night post and just forgot to make the key point that I was trying to duplicate the HD home fix.