97 W210 E420. Same old AC blowing hot, I've read through most of the DIY threads about it...a wealth of information and has been helpful and very educational. I ran the diagnosis which had reported low coolant, tried to replenish that but found I had too much coolant after trying to add more, pressure was high in the 70psi color code RED. I still hear a hiss in the center chutes while being blasted by hot air. I also cleaned out the duovalves. Know I also get the ECT sensor code have no idea where to go from here, any insight is great appreciated. I'm sure someone has tackled this already. DO I have a faulty sensor? help guys, thanks.
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