Originally Posted by Saturn49
So the Bolt is apparently just not a great tuner.
This is the key sentence.
I also have a Tivo Bolt, and also had problems with channel 15 when no other tuners in the house did (including an old Tivo HD). Though it wasn't really limited to 15: I'd see it on 21 and 47, too, we just tend to watch more stuff on 15, so between that and 15 being the weakest of the big 4 stations in Madison (lower powered, and intermittent co-channel interference from WGN in Chicago), we see it there more often.
Previously, we had the Tivo Bolt hooked up to Charter cable and had a lot of pixelation problems with Charter's TV service, too. I assumed it was Charter, but after continuing to experience signal issues after switching to antenna, despite repeated attempts to improve the signal (ended up installing a rooftop antenna with distribution amp and high quality coax), and not being able to reproduce the problem on other receivers in the house, I finally considered that maybe the problem was the Tivo. My previous 3 Tivos had been so rock solid the thought had not occurred to me, but it didn't take much Google searching to find threads like this:
I also tried to get support from Tivo on this issue, and they just sent me a useless link to one of their knowledgebase articles.
We ended up getting YouTube TV, and after using that service for months, found that we were hardly ever using the Tivo anymore, and often when we did, we'd run into recordings with signal issues. Then a few weeks ago Tivo introduced the pre-roll ads that play before you can watch any of your recordings. I unplugged the Tivo and put it in the basement when that happened, and can't say I've missed it.
It's a shame -- I used to be a huge fan of their products, but between the flaky hardware, poor support, and now pumping ads into my recordings, I don't see myself buying another Tivo in the future.
Good luck in your quest for reliable Bolt reception. If you're handy with a soldering iron, perhaps you can check for the RF connector solder issues outlined in the tivocommunity forum posts, and repair if necessary.