I finally gave up trying to fix my air conditioner problem by myself. Regardless of how I tried to figure it out, I couldn’t find a way to replace the mildewed insulation without removing the heating coil and separating the unit from the duct work. While I’m sure I could disconnect it all, I am quite sure I could not reconnect it again. It meant I needed a professional.
So I paid to have someone come out and look at my dilemma and make an estimate. Not surprisingly, the estimated cost approached the cost of a new unit. Only this time the new unit was half the cost of the previous estimate, and this proposal kept the feature I like best about our current heating system; it runs off our natural gas hot water heater.
By Wednesday afternoon the mildew should be gone.