I have Octavia II 2.0 fsi 2006 I’m having air-conditioning problems recently all the sudden start to blow a hot air I went to work shop and he remove the freon to replace it by new one the surprise is when he charge it by manufacturer specification the low pressure side gauge will show over load then when he started to release the pressure until it reach in high side 240 psi & low side 75 psi my air con will work perfectly but if turn the air con off or if i go for ride the air con will start to blow hot air and when we check low pressure side gauge will show over load again and when the technician advices me to change TX valve i did but i still having the same problem so any buddy cold know what the problem cold be is pleas tell me thanks.