Our new 42MKII (2000) #691 is having a problem with the AB system. The system is blinking 1 which is a low voltage indicater. No way. I have checked all the bateries and they show 13.5 +. The wiring to the comoressor is a long one, but heavy gage. The connection to the compressor is poor. The wires are way to big for the terminal. The thermistate is on order. Nothing seems to work. Ideas?