Mark Levinson 23.5

You didn't mention how you measured the temperature but assuming a temperature gun, its possible to have 10 degrees F margin for error, depending on how you hold/point the gun or the specific point of measurement. Just a possibility.

Actually I measured it 2 ways. One using a Raytek infrared thermometer locating several different hit spots and the other using a Fluke 52 with a surface probe. The most hear is generated at the top of the rear heat sinks, which makes sense. But I can literally feel the temp difference with my hand. It's noticably different, much warmer.

I have owned a 27 and 27.5 and they never ran hot as you are describing.  Did your repair shop check the caps, resistors, etc?  Have you used Google to research this issue?  Personally I wouldn't use this shop any longer because they haven't found the issue plus I would be reluctant any way to take the amp back as they want you to trade up. To me thats a flag especially trading for a Bryston 4B. Not that it is a bad amp but the 23.5 IMO is quite a bit superior sonically. 

Samzx12, my 23.5 never ran hot either. Maybe a bit warmer when I pushed it harder. I may have worded my last post incorrectly about trading up. I was asking my dealer what should I do? In such a way like, wth, should I trade up or what are my options. This amp went back in to them 3 times in the last 4 months. Originally it has the left channel distorting which they corrected. I received it back with a short noise in the right channel which went away after 30 or 40 seconds. Either way it wasn't right, so it went back again. Immediately after I got it back is when I noticed it running hot. It went back again. It was suggested then in discussion and frustration that I asked wth I should do. That's when it was suggested the Ayre Acoustic amp would be my next jump up and sonically would wow me. It was also suggested I should audition the Bryston as technology has come a long ways through the years and I would be shocked that it supposedly out performs the Levinson sonically. That's a hard to me because I love everything about this amp including the classic BPA look. For now I have resorted to putting a 4" fan blowing on it to cool it plugged into it's own receptacle on a different circuit. It's actually a pretty quiet little fan and running this thing pretty hard is only about 115*. That's more like it use to feel. It just sucks because the original repair cost me over $800 and I know sensind it out east won't be cheap either. Sucks!!!

I loved the design and looks of the 23-27 series of amps and have heard the 23.5 was one of the better sounding of the series. OK I understand what your dealer meant now however, they aren't fixing the heat issue. It sucks your out $800 but it started running hot after they had worked on it. So I am not sure what your conversation was with the dealer are you sure they set the bias correctly and checked out everything else. I am guessing it sounds just like it did before?  Also, hopefully someone that knows amps can chime in here.