I increased the cross-flow opening under the air filter rack to a true 20"x20". What a difference. The ECM blower and the condenser have quieted down considerably and appear to run more efficiently. Most important of all is that the temperature rise (delta temperature) falls within specifi...

The evaporator coil is located right atop the air filter rack and below the ECM blower and controls. I simply placed a plastic drop cloth on the top of the A-Frame and rinsed from underneath. I did this added rinse because the AC will not be up and running for at least a couple weeks and wanted to m...

I lucked out today with 75° temperature and indoor humidity at 45%. I was able to run the AC for 30 minutes for rinsing the evaporator coil and later garden hosed the coil from underneath for a more thorough rinse.

I cleaned the evaporator coil as per your instructions and feel confident it was done properly. I went one step further and garden hosed the coil from underneath for a more thorough rinsing after running the AC for thirty minutes in 75° weather. That coil cleaning article proved to be the inspiratio...

Yes. The product is CAL-SPRAY, http://www.acmeref.biz/public/acmepubli ... apfoam.pdf "evap foam no rinse" evaporator cleaner.

I am in the process of enlarging the return plenum filter area to 20"x20" to finally satisfy the airflow requirement for a 5 ton heat pump. I now have access to the evaporator coil and would like to do the foam cleaning from underneath the A-Frame. What would be the lowest ambient temperat...

http://www.goodmanmfg.com/Portals/0/pdf/SS-GAEPF.pdf Goodman 5-ton Heat Pump with Variable Speed Air handler 2500 sq ft home located in NC. I purchased the heat pump online in 2004 and installed it myself then managed to have a pro take care of the refrigerant end of the install. A bad move that I k...

I figured spraying from underneath the A-Frame is the proper way for cleaning. All control areas will be protected from the spray cleaner. I'll be doing this project when the AC can be run with appropriate outdoor air temperatures.

I would remove the access panel and carefully use a soft bristle brush parallel with the fins and vacuum up the debris and dirt. How would it be afterwards, if I were to spray the foam cleaner to the top part of the A-Frame and allow gravity from the top part of the coil to the bottom part to clean ...

The system is up flow, so I'll have to access from under the A-Frame. The way the heat pump is set up, there is no access from the return box plenum. However, I noticed that the pics from the article and looking at my evaporator coil that an A shaped access cover attached by screws exists. Can I saf...

I was reading the "Cleaning Your Air Conditioner" article, http://www.mobilehomerepair.com/articleairconditioner.html, and find it to be very informative. I have never cleaned an evaporator coil before. It was my understanding that the coil should be cleaned from beneath the A-frame. It ap...