we had bad storm last night. I was in the basement and heard a loud pop thought lightning had goten something. The power did not go out and no breakers blown. So not sure what is was sounded like it came from water heater or heat pump. I thought maybe the heatpump had like an emergency cut off or something that may have tripped but it came back on in about 20 minutes and is working fine water seems ok so far. Any thoughts?