a/c woes

been awhile since i've posted anything just been really busy! my 9040b is giving me the blues, i turn the a/c on; cools great, checked pressures all is well, but had seat out to recover so gave all inside cab thorough cleaning. hoe is a sumitomo built machine, any how, as i said it cools great until the control starts switching by itself, it will go from back of cab blowing to window defrost, max cool to blowing hot air. i realize its prolly a blend motor but i have no idea which one or how...

a/c woes

a/c woes