Today I came to Michael and Kate’s Silver springs home to perform a furnace inspection before winter. Kate has informed me that they do not own the home. Because I do not have permission from the home owner in writing to work on this system, I can only do a preliminary inspection. I can not change, alter, or perform any act that changes the furnaces current condition. Furnace inspection: Upon inspection of the 52 year old furnace I found it is in poor condition. The thermocouple and gas valve have been replaced and are working well within manufacturers specifications as is the blower motor however it has a very loud, hard start. The fan control limit switch sticks slightly but works. The heat exchanger is badly rusted and most likely has failures. I can’t not perform the full safety inspection without the home owners consent as the inspection will likely result is the furnace being found unsafe for use due to a failed heat exchanger. Due to the age and condition of the furnace, I re