Mazda 3 2004 Ac not working

[ferreira_scb]

Hello mate,

I changed the engine ECU and fuse box to Mazda 3. The AC not wok.

If I press the button the light in button turn on and in display appear a message that is turned on.

but the kompressor to AC not start. If I forcing it in relay the kompressor start.

it's make me crazy. Can some one help me please??

Thanks a lot

[SaieedEissa]

Can you read the refrigerant pressure value, and the ambient temprature?
If ambient temparature is low, compressore will never come on + if pressure sensor defective too

[ferreira_scb]

I will check thank you