SLEXC400

Have any of you with the AVN5435 had any problems raising the volume? My rocker switch has gotten progressively worse to the point where it only works when the interior is hot. I went by the shop where I had it installed and they said they can't do a thing about it, as it was installed over 2 years ago and is out of warranty. I sent a note to Eclipse, but I've yet to receive a reply. Very frustrating, considering the high cost of the unit! I know I can use the optional remote control, but I hate to have to do that ...

Thanks in advance for your replys.