Today heating function checks were performed. The heating systems were checked for electrical and mechanical function. All filters were replaced. There were several components that were worn and replacement is recommended. These are all parts that wear over time and are at the end of their lifespan. Photos were taken of each component. An estimate will be sent via email for replacing the deficiencies discovered. All rooftop units are in service and heating. Thank you, Jon Tech notes: Unit #5 (s/n ending 50234) contactor pitted and scorched, run capacitor 21.8uf (rated 25 +/- 10%) underperforming Unit #6 (s/n ending 50212) contactor pitted and scorched Unit #7 (s/n ending 50210) contactor pitted and scorched Unit #8 (s/n ending 04680) contactor pitted and scorched, belt splitting.