MY AC BLOW HOT

[SASKA]

I park my car RX 330 of 2004 model with A.C. working in a good condition over the weekend . When start my car on Monday.  My A.C. start blowing hot . The TEMP is at final lower level. Yet it still blow hot. 

Please advice . 

[RX400h]

You should have the AC refrigerant checked. If there is a leak somewhere in the AC system, your air conditioner will not blow cold air.