Performed a heating pm on an oil furnace. Brushed and vacuumed. Replaced the oil filter, nozzle and strainer. Started and checked the safeties. Performed a combustion test. 6.8% o2, 43 ppm, 81.6% efficient System is operating properly. Performed an A/C pm. Blew out the drain line, replaced the air filter, customer supplied. Checked and tested the condensate pump. Rinsed the condenser. Checked the electrical connections, checked the pressures and temps. The compressor side of the capacitor is reading lower then allowable. Rated for 35/5 mfd +/- 5%, it was reading 32/5 mfd Replaced the capacitor. System is operating properly.