Air Conditioner on 2000 Volkswagen Beetle

Just picked a 2000 Beetle. Found out the air does not blow cold. The compressor spins, plenty of coolant and fuses are good. One thing we could not locate is the low pressure switch. Could you tell me where to look and is there any other suggestions?

Asked by for the 2000 Volkswagen Beetle
Really need to have a skilled Tech look at this:

here are some shop: