Performed a heating pm on an oil boiler an oil hot water heater. Brushed and vacuumed. Replaced the oil filter, nozzles and strainers. Started and checked the safeties. Performed a combustion tests. System is operating properly. Performed an A/C pm. Blew out the drain line, replaced the air filter. Rinsed the condenser. Checked the electrical connections, checked the pressures and temps. Added 2 lb 15 oz R410a to the system. System is operating properly.