I plugged the motorhome into shore power. Naturally of course the A/C unit is not putting out cold air. The rear one won't even come on. Even though the switches are set to front so that they both...
Shane, I'm sure a 'tech' person while chime in soon. If the units are original, they may not be good anymore (31 yrs. old). Have you owned the coach very long? DId they ever work for you?
I wish you all the luck in the world but sometimes things just break. I'm like you, I HAVE to have my air.