well i just had to have the ac compressor replaced in my 00 blazer 4x4. along with the accumulator and orifice hose and o rings and all that good stuff. well now my heat is not blowing good. it would burn u up just being on one. but now on 4 i can barely feel it. it only blows out of the defrost vent but barely anything now. my ac works good now but i dont need it. could my blower motor be bad?