How do I know my CCU is failing

[MvM]

Not the weather is getting cold, I have noticed that it takes a long time for my car to heat up inside.
So I am wondering if maybe my Climate Control Unit is failing. However, I am not sure about this because I have no idea if slow heating is a factor in this or that maybe I might have some other problem.

Can anyone please enlighten me on this subject perhaps ?

 

[Briank]

You can check to see if the water valve for the heater is opening all the way. Just crank the CCU to Max Temp and look at it and make sure the cable is all the way out. I would lean more towards thermostat being your problem.

See the upper right of this picture for the water valve.

 

[goldNSX]

Sorry for hijacking your pic, Brian.

If you heat up max on the CCU the water valve should point in driving direction. Make sure nothing is in his way. Also check your engine temp (thermostat).
There is also a switch on the CCU where you can choose -1.5 or +1.5 degress.