99 Fairmont Aircon issue

[Kotche]

Our A/C stopped working today, the vents just blow out 'normal' air.

Here is some information I think may be relevant:

• 99 AU Fairmont with climate control.
• Compressor was replaced 4 or 5 years ago.
• The whole climate control LCD has gone dull recently (almost impossible to read the temperature/kms left to the tank etc.)
• The metal pipes going from the engine bay into the interior are ICE cold, ie ice is forming on the pipes when the car is running.
• The R1 Relay in the insides fuse box is missing which according to the manual is for the A/C.
• The heating aspect of the A/C has never worked although this doesn't bother me.

So from my very limited understanding I'm assuming that the compressor is working fine due to the ice on the pipes but the cold isn't being circulated into the air vents.

I find it odd that the R1 relay for the A/C is missing but I'm presuming it always has been or isn't required?

Given the information provided can anyone point me in the right direction?