I have seen several heat pumps lately with scorch marks around the suction line where it enters the air handler. In one case the grommet was burned as well. What causes these scorch marks?
In all cases I have recommended an HVAC specialist.
You should asked your question before you send your report you are providing a good laugh for some HVAC tech as was stated some guy with a torch that would have been better off if he had stayed home that day