Air con sometimes working?

[thenixtone]

Not sure if it's just me but when I bought the car (R34 GTT) the air con @ 18 degrees is sort of coolish, not cold,

 

and now sometimes it gets cold randomly, and can go hotter (but still cold I guess) randomly, but most of the time its the original 'coolness'

It also makes an audible noise coming from the engine bay when the air con light is green. Sort of sounds hissing but it hasn't dropped coolness, could be belt I guess?

 

Any ideas? Lol

 

Edited January 27, 2019 by thenixtone

[GTSBoy]

have you put any thought into the combined possibilities of;

A) Getting the thing regassed,

B) That the air blend door is playing up, like it does in almost all Nissans of the era?

[kingtube69]

Like GTSBoy said, common for the blend door actuator to break. Stick your head under the drivers side foot well and look to the left you will see an arm and rod there, the actuator is connected to it. Have someone jump in your car and change the temp up  and down you should see the arm actuate the rod. If not then you will need to change the actuator