Arrived for single rut heat maintenance inspection. Began by replacing air filters inside the suite for our clients. Once replaced I proceeded to the unit. I tested and checked all electrical components and ensured the electric strip heat was working properly. I found the control board of the unit to have corrosion on it and 2 legs of electric strip heat are very high. The blower motor is also over amping its recommended specification. I showed this to our client and he elected to monitor the unit for now. And potentially replace the entire system when failure occurs. I did I for him that his unit is the only unit without gas heat and upgrading to heat would be an option when replacing the unit.