2002 330, customer brought in recently purchased. looks like it had been in a front end wreck. No heat, I have replaced water pump, reservoir ,T stat, trans Tstat,back bled and flushed heater core 4 times. flushed block from water pump to water valve.. consistantly get what I consider a poor flow to the water valve... sometimes I can get heat after bleeding and rev engine up to 4000 rpm, but then it goes away.. I can monitor heat exchanger with scanner and heater core is usually 75 degrees f. Disconnect water valve, always get codes 1c 1e and 18???? how can I get a description of the climate control codes???? cant find them anywhere..temp gauge always shows in middle and computer says about 204 F car never overheats.