Electronics repair Ontario

This will be a challenge to find someone able and interested in doing repairs on older elctronic controls.

I have no experiences with them, but maybe
Ecumedics.com would be useful. They appear to deal with German electronics, which is where much of Ferrari would have likely sourced its parts initially.

If you have a problem with your ac function, it may well be a relay or something other than the eletronic aspect. Use deoxit on all wiring connectors.

Look at the exploded parts diagrams from eg. Eurospares and see what the components in your system are as a guide for what needs looking at.