For this job, I was performing routine maintenance on an air-conditioning unit. Upon checking the unit first thing I noticed was the static pressure was extremely high. After checking the heat exchanger on the furnace itself it was showing extreme signs of wear and tear and pinholes. This is something that needs to be replaced very soon. The furnace is 23 years old, so it makes sense that it would be This worn down. The temperature differential was very low at single digit degrees. After I checked the outdoor unit, I figured out that the refrigerant was extremely low and this is the reason we’re having trouble cooling air. Because of the furnace, static pressure and the refrigerant Combined I sought out a field supervisor to come up with better solutions.