JC2024

Hi all, I drive an Octavia Mk3 2015 Recently my AC/hot air both stopped unexpectedly. No warning signs. fuse was okay removed my original blower motor and tested it, the motor worked fine but the resistor seemed damaged. There was a voltage coming in through dash cable vents all seem to be working okay i bought a second hand blower-motor and resistor part to replace mine, now my air is working but it is often remaining on, even if I remove my key from the ignition and turn all power off the air continues to blow and cannot be turned off (with no engine running/key in!) it continues until I disconnect the blower/motor cable manually I wondered should I aim to get a second new resistor? Or could there be a problem further up the electrics in my dashboard or elsewhere? cheers JC