Ac solenoid on thermoquad

You can actually wire the solenoid to make it idle up for the A/C as Del mentioned, BUT, it's not strong enough to do it "all by itself". What it would do would be to engage the solenoid when you foot is ON the gas. Then it would "keep" the idle up "from there". Now......another option, and I like it and have used it a few times before is using an A/C idle up solenoid from Toyota. It's a pretty cool little deal. It's basically a solenoid hooked to a manifold vacuum source. When it sees 12V, it opens the intake manifold vacuum source to the atmosphere essentially creating a controlled vacuum leak and raising the idle speed. It has its own little filter element to filter incoming air. The addition of that small a vacuum leak has no adverse effects and does the job. Power, ground and one vacuum hose is all that's needed to connect one. Here's one.

For Toyota Vapor Canister EGR VSV Vacuum Switching Solenoid Valve 2586062010 | eBay