VZ Aircon switching to the screes

[1957chev]

Hello my VZ ute switches over to the screen when I floor it ? then when I back off it comes back to where it is set ? any ideas ? seems like a vac leak but where ?

 

[CONROD]

Yep definately vaccum related. Easy fix don't floor it:idea3:

 

[gendi]

mine does the same things, after some research it appears to be one of the solenoids under the dash behind the radio (there are 2), as of now i will just live with it as i dont have $$ for a new one or the determination to pull the dash apart to replace them.