You probably don’t spend much time thinking about your electrical panel. You just turn on the lights and carry on your business. But that electrical panel plays an important role in your house, and if you need an electrical panel upgrade, you can’t afford to ignore it.
If you want to do a DIY project, perhaps stick to something small such as repairing your kitchen cabinets or a leaky faucet. When it comes to an HVAC system, they are much more complicated, and your risk of causing farther damage is enormous.