Musty air-conditioner smell

[Ksean]

I have a new to me (I'm the third owner) 2004 Adventurer 38R.

I ran the air-conditioner for a few hours yesterday and it ran quite well however when I shut off the cooling the blower was putting out a musty smell.

I located the drain and it was plugged up pretty bad. I pulled it out and LOTS of water poured out. I stuck my finger inside the hole and rubbed it around and it was quite dirty inside the drainage reservoir.

Is there any way to clean out the drainage reservoir?

[Morich]

Musty is often mold or mildew from standing water. I would do a strong bleach water cleaning or scrub .Observe safety thinking for bleach to avoid tie dyed pants and shirt!!!

[Ksean]

I understand that I should try and clean the A/C unit I just don't know how.

I am looking for help as to how to access the area that needs cleaning.