HVAC service

https://charlie-wiki.win/index.php/Why_Energy-Efficient_HVAC_Systems_Matter_for_Your_Home

I had to call for HVAC service last July when the AC started blowing warm air during a heatwave. The technician arrived, checked the refrigerant levels, cleaned the condenser coils, and noticed a small leak in the line set. They sealed it, topped off the coolant, and the system cooled fine again. It cost a couple hundred bucks but beat sweating through another night.