Have you considered using an infrared LED to control your aircon, instead of the servo method?
This is what many people, including myself do. The IR Remote library has built-in commands for many common brands of aircon, but also has the ability to learn new coded by attaching an IR photodiode to a device and capturing the codes used by your existing remote.
Also, the Raspberry Pi is t really the best hardware for a project like this. You’re much better off with a simple NodeMCU device that requires no operating system and is programmed in C++ (which is much more common within the Blynk and many other maker communities).
Here’s a link to the project I use to control my aircon and ceiling fans using IR LEDs. My infrastructure is rather different to what you’d use because I use Blynk in a non-standard way, but the small white box with two LEDs poking out contains a Wemos D1 Mini, which could run the Blynk code you need to achieve this.