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older a/c smelly issue

soon2bexpat
Explorer
Explorer
I have a 2002 Thor 18DT with a Dometic 57915C a/c unit, which I believe is the original. Recently, there has been a musty smell when I turn on the a/c. The interior filter seems OK. Is there a filter that needs to be changed from the roof?
Kodachrome Time Machine, my vintage photo collection from the 1940s to the 1970s: https://www.youtube.com/channel/UCff0z54NyAfuAjUST896l6g
5 REPLIES 5

Beaker
Explorer
Explorer
My truck does that sometimes.
Condensation grows mold and such.
Try leaving just fan on for a few minutes with A/C off.
Cleaning coils will probably clear it for awhile but will come back.
2008 Silverado 2500HD Duramax
2010 Cruiser 26RK

soon2bexpat
Explorer
Explorer
I'll try that, thx
Kodachrome Time Machine, my vintage photo collection from the 1940s to the 1970s: https://www.youtube.com/channel/UCff0z54NyAfuAjUST896l6g

wanderingaimles
Explorer
Explorer
x-2 on coil cleaning. This stuff worked well for me
Lowes

dhull
Explorer II
Explorer II
Recently cleaned the cooling coil on roof. Have to take it apart to the point you can see inside camper from roof. Used a foaming cleaner and rinse with water from spray bottle. Used towels to keep water from entering camper. Smells lemony fresh now!

bgum
Explorer
Explorer
Are you sure the condensation lines are flowing? If not that is the cause.