A/C Problem Solved!!!
Thanks to the advice of Myron (YC1) the problem is solved. I turned off everything in the coach, unplugged from shore power,
and turned off the battery disconnect nobs at the rear of the rig. Then I plugged back in the shore power, turned back on the battery disconnect nobs, went back in the coach, and presto, the ac came on and was soon blowing cold air. What a blessing this forum is. It is truly INVALUABLE.