Common cause of air handler freeze up?

[Vector]

My air handler seemed to be making a dripping noise, so I turned the system off and took out the filter. When I looked at the coils, they were frozen half way up with a sheet of thin ice.

Everything is cooling, so I am not sure what the cause is. Hopefully it is something simple?

[Paul Bee]

Call a pro.

[jpsmith1cm]

Yep.

You'll need a pro to fix that correctly.

[tinner73]

that is usually caused by a lack of airflow or a lack of refrigerant.

if the filter was clean call a pro out.

if the filter was dirty...shame on you.:whistle:

[Vector]

My filters are changed every 3 months. The most recent one is a 3M, and just a week old, I think with a 4 rating.
Since my system is just a couple years old, it shouldn't need freon unless there is a leak, correct?

If I do need freon, what are the likely places it might have leaked from? I know that is a very broad and general question, but considering the ignorant techs in my area that barely speak English, I'd like to have an idea for myself where the common leaks are.

[saylor240]

Leak could be anywhere, call the Manufactuer and see who the recommend in the area to do service, could be a number of issues. you have already eliminated the fact of the restricted Fliter. at 3 years old, you should consider a service contract. You don't want a summer freeze up in S.Florida....

[SkullMonkey]

The 3M Filtrete air filters can be overly restrictive on systems with maginal airflow.

You may want to try replacing it with a cheap EZ flow filter and see if that helps, if not call a pro.

[tinner73]

The 3M Filtrete air filters can be overly restrictive on systems with maginal airflow.

You may want to try replacing it with a cheap EZ flow filter and see if that helps, if not call a pro.

this is where i would start.