Performed quoted repairs on the dryer vent. Used a large piece of plywood to lay across and used a sawzall to cut into the “old roof.” Used a new 90 and connected all pieces of the dryer vent that disconnected and ensured they are secure. Also performed an electronic leak search on the master bedroom HVAC system, but couldn’t find a leak at the indoor coil. Added about 0.8 lbs of R-410A slowly into the system to see how it reacts. The system seems to be low on refrigerant. Built follow-up estimates with the customer. Reported results to the customer. Scheduled to return next Monday 8-10 to perform a leak search and condenser coil cleanings.