Blowing cold Air only! No heat...

[divinchi]

Hello guys, again forgive me if this has been asked and answered but I have not been able to find the answer to my issue. My AC works fine, the motor blower works, the heater core was checked and works, the thermostat was replaced, and the coolant was flushed, so I have no idea as to why I am not getting any heat. What else can be checked?

Also the steering wheel heat function doesn't work at all. The mechanic has checked everything and said the last thing to do is to check inside the car which their are sensors inside the car that may be damaged. When he checked it, it gave a cabin sensor warning but when I do an internet search I don't find anything on that or anyone else having a similar issue.

I have a 2008 3.0si.

Thanks guys