It's funny, but at school we actually cleaned the big dual units in the automotive department. The units were so plugged up that the pressure on the high side on one of the units was 300 PSI. That means when it hits 301 PSI it will trip the breaker. After we cleaned the outside unit, it brought the pressure down to 220 PSI (on the high side.) That's a huge difference. And all we did was use coil cleaner on the coils, and take a water hose to it.
So I figured it was time to do this to our units. The house is 22 years old, and has two A/C units. (As pictured.)
One is a Cumberland and is still running after all these years. (As pictured.)
The other is a Trane, and is the third unit we've had for that side of the house. It replaced the old unit just a year ago. When I looked at it, it was really clean so there was no need to clean it.
So I took apart the Cumberland A/C unit, and gave it a good cleaning. It's made a little differently than I am used to seeing. The outside part of the unit is basically grill cloths protecting the inside which houses the coils. So after removing 20 screws to get the top off, I sprayed it down with coil cleaner. I then went to town on the grill cloths while the cleaner did it's job.
I used my shop vacuum to remove some old leaves and grass from the inside of the unit. I then used the water hose to spray the coils from the inside to outside. I gave it a good, nay, great cleaning. I put everything back together, and I put back 19 of the 20 screws. (I have no idea where that last screw went.)
So that was more time consuming than it was mentally challenging. However, I was in the full Florida heat, and it really started to wear me down by the end of it.
So the next day, Saturday, I decided to clean the inside vents. Again, after 22 years they can get full of stuff. I was cleaning one of the vents when I thought, "Why don't I just pull the two screws so I can run it under some water?"
Here's what the outside and around the vent looked like.
So I went to town around the vent and inside the vent.
This lead to a lot of gunk falling down everywhere. This lead me to get out my shop vacuum. It's a Rigid wet/dry vacuum, and has served me well for many years.
I then continued to do more of the same around the house. Namely, take off the vents, and give them a good cleaning, and shoot a bunch of Lysol down the vents. Then I would break out the shop vacuum, and clean everything up. Some of the vents weren't too bad, and all I had to do was wipe them down. While I was at it with my rag and bucket of water, I went ahead and cleaned off the fans. Those things collect a ton of dust in no time at all.
So my next step will be to take the inside unit apart and clean the coils in it. I will also clean out the drain lines. I'll try to remember to get lots of pictures of it so I can write a second part to this blog.