I have a Nordyne Vexar Model 1836QA. This is in a manufactured home. I found that the condensation was up to the top of the drain pan - not draining. I have no idea where to begin to trouble shoot this issue. Any help would be appreciated.
Don't know the area you are from. But it is very common here in the deep south for our A/C drains to clog up with mold, mildew and other crud quite often during the summer months. About once a month mix up a mixture of hot water and bleach an flush out the drain lines. There are commercial cleaners available that may be more environmentally friendly.