[Doc Holliday]

Your evaporator coil is more than 50% blocked so all heat that is supposed to be picked up from the living space is not being picked up and distributed to the outside condenser and out into the air. You are recirculating the same heat and not removing any.


You need a severe evaporator coil cleaning and I'd be willing to bet a condenser coil cleaning as well (to be able to get rid of the heat) and an air flow static pressure check to certainteed that your system is moving proper air flow and proper air flow is mandatory to system charge.

Have your coils cleaned alone and you'll drop 10 degrees supply air, gauranteed.

 

[Doc Holliday]

OH, that dirty thing is the evap coil. I couldn't see it at first through all that dirt.

hehe!! <snicker>

The poor guy, I'm glad he removed that duct so we saw it and could help him.

OP, air flow is critical and you have none. That is filthy. You need to have the return air duct/chase checked all around the system to ensure you are not pulling any dirty air from anywhere other than your filter grill and keep your air filters new and clean, after you have those coils cleaned.

beenthere, you made me smile. Thanks bub.

 

[Doc Holliday]

The sad part is I've had one guy clean it and 2 other AC techs come out and tell me there was nothing wrong. Yet with one little picture u guys pointed it out. Now how the hell should I clean this thing? Go at it with a can of evap coil cleaner? I don't wanna take it out of the system.

Thanks btw!

You can use a hair brush from the 99 cent store and stroke from top to bottom WITH the "grain" of the fins so as to not bend them. You remove all of the cover dirt with a brush, be it a hair brush as aforementioned, or a wire brush and yes, you then can use a can of evaporator coil cleaner and spray it into the coil. You can pick up an environmentally friendly no rinse foaming action can of evaporator coil cleaner from The Home Depot for $4.99. Get two cans. It is a no rinse formula because the condensate from the coil (humidity pulled from the air) will rinse it off once the system is back up and running. Clean the coil with the system off.

And you're welcome.

 

[Doc Holliday]

It doesn't look so blocked in the close up. I'd clean the condensing coil as well and yes, that entails removing the lid of the condenser as well as the outter gaurds (pretty much taking the condensing unit completely apart) and spraying a CONDENSER coil cleaner into the coils from both the inside and the oustide. That you can not find at The Home Depot but I notice you have the evap coil cleaner from an hvac supply house in a pic (green can) so if you can get your hands on the CONDENSER coil can of cleaner, do that as well and that WILL NEED RINSING as in with a hose.

 

[Doc Holliday]

ps, you're ducts ARE NOT SEALED with that cheap and weak foil tape that is already peeling off. Use mastic aka hardcast and be done with it. Yes, around where the ducts attach to the plenums and everywhere you have air flow.