You turn on your heat pump, and you smell something burning. What should you do? Who should you call first, the fire department or your HVAC technician? First assess what the smell most likely is, and you may not need to call anyone. Of course, if you’re still nervous because you just don’t know, turn off your heat pump and give one of our highly trained technicians a call at 210-698-8520 to come out to diagnose the smell for you.