I'm hoping this doesn't get classified as "DIY" thereby igniting some flaming session...
Fired up the A/C yesterday to a smell not familiar from the vents, even after having not been fired in weeks (live in FL) - popped the hatch on the air handler this morning and found the following (Lennox CB30M, house/hvac are only almost 3 years old) - my question is two-fold:
a) does that look like mold on the insulation to the left?
b) the vertical "plate" on the right-side wall is non-existent on the left where said gunk is - is it missing?
To my untrained non-professional eye, it would appear that the 'plate' is designed to prevent exactly what's happening on the left, and is missing.
I intend to have the entire unit cleaned ASAP, but want to understand what I'm looking at, etc.
Much obliged -