Harman Kardon Citation 22 No Love?

Do you have notes on the bias circuit modification

H/K was the first company to realize the importance of square waves and wide frequency response. H/K i.e. Matti Otala designed their amps, including the Citation 12, to output great square waves at both 20Hz and 20khz. A noble task. Most amps of that era couldn't come close to the wide bandwidth output of the Citation amps. It became so important that most audio magazines of that era posted square wave response photos of the amps that were tested and reviewed.

Hi!
I now own 2 Citation 22s! Because of problems with the first one, I bought a second one.

1st one: Sounds great but left channel output transistors and heat sink gets REALLY hot within a few minutes. Scares me enough to shut it down. Can you elaborate please on the error in the HK wiring in case that is the cause of the problem on my unit?

2nd one: It ran great for a couple of months, then the lights would flicker and the relay inside was clicking away, the sound going on and off (even with speakers disconnected)!
My tech friend so far tried exchanging the relay, then the controller board with no change. Finally as per my request, I asked him to connect jumpers across the relay (defeating it) and I am adding an external delay relay (about 12-15 seconds) hoping that it will keep the speakers and output transistors safe???

Any suggestions are VERY, VERY welcome. Kind of frustrated on this end!
I DO love the power of these amps and their clarity and musicality (neutral?). I am powering Infinity shoulder height RSIIB's, with two 10" woofers, ribbon mid-ranges AND ribbon tweeters, front and back (These REQUIRE 100-200 good watts per side!) (A bit of bi-polar going on here, what with oak wings etc!)

LOVE to hear back from you!
Sincerely,
Bob
(Audioholic since age 12, 48 years ago, collector including QUAD 909 and electrostatics!)

The output heatsink heating up is due to either bad output transistors, too much D.C. at the outputs, or bad bias heatsink transistor. Usually, there is a transistor mounted to the heatsink that adjusts the bias up or down depending on the temp. of the heatsink. That might have failed. It's also possible the bias trim adjustment may have fail or is improperly set. Find a good repair facility in your area and have it serviced. It's probably due for new capacitors as well given it's age.

@ pmanaudio-  I just purchased a Citation 22 that runs hot but sounds great. Can you please reply with the steps you used to resolve your amps issues?