Hello everyone,

16 AMG GTS. I recently replaced the HVAC control module due to having zero climate control functionality “wont turn on, no lights on push button unit” and “no communication with AC control module“ when scanned. Also had “malfunction” warning message in center gauge cluster and thought they were related. Now with the new HVAC control module, the climate control System turns on, I can control fan speed, air temp, diffuse location, etc. However, the air only blows a constant temp (no hot, no AC cold air) no matter the temp set. All codes cleared and still have “malfunction” warning light on and scanner is showing no dtc’s. Any help is appreciated. Thank you.

John,

you need to do a proper diagnostic with Xentry
shouldn't be a problem if you can afford a GT

I have icarsoft Mb 2. I do not have access to a Xentry system.

look in you private messages

I cannot gain control of HVAC flap motors through scanner. The scanner is showing “NA” where you would normally enter a value to actuate the different HVAC location motors (floor, defrost, etc) Anyone have ideas what to check for now?

probably just need a little online coding
not possible with your "scanner" thing