Hello, We recently had an inspection on a home we love and want to buy. The inspection was perfect, besides this issue with the HVAC system. I attached a photo Inspection report notes: System is badly corroded below the A-Coil I wanted to see if someone can answer some simple questions for me? How major of an issue do you think this is? Is this something can be fixed or would it need to be replaced? And most importantly – Does this pose any safety concerns if left as it? I know that furnace issues can be related to carbon monoxide issues, so this would be a major concern. We are just trying to figure out how big of a concern this is before having to bring out a professional. Thanks!

I have a Rheem Model RGFD furnace that uses bypass duct work to reduce noise in my duct work ( I have 2 zone heating). I had a problem where the furnace tech said the ECM was not communicating. The problem I had was the furnace would ramp up and down and not stay on. While the tech was evaluating the problem he noticed the damper arm on the bypass duct work did not have any weights on it. When this damper is working, it does not open very much which tells me there is not a lot of air going through it. I think that is why the weights were left off by a previous tech. Anyway, the tech said with the weights off, the damper could be vibrating and delivering an uneven pressure and causing communications problems with the ECM. So, with a damper not opening that much, is it still possible that my damper could be vibrating and causing an uneven pressure? Before leaving, the tech put weights on the damper arm at a position up the damper arm to have minimum weight effect. Now, I am wondering if this damper is doing any good at all with the extra weights and could it vibrate without weights. The diameter of the damper is about 10 inches, so it is not small. Thanks, Jerry 4/11/14