I'm having issues with my AC. Basically, the symptom is that I feel cold air coming out of the vent, but it has no pressure, almost like I have to put my hand IN THE VENT COVER to feel any cold air. To me, it seems like the blower is not blowing any air, or it's clogged somewhere in the process and it is blowing.
Just some background... I just moved into this house, so I don't know too much history of the AC here. We haven't really tried it yet because the weather just got hot.
It's a central unit with the compressor/condenser outside.
I found the filter inside was extremely dirty, probably due to all the remodeling we did here. I will replace that. (Note: as of this question writing, I have not tried the AC with a new filter yet).
My thermostat is new (On a side note in case of relevance, the previous thermostat did utilize the B wire. I did some research and this is a common wire, the new Honeywell thermostat does NOT have a slot for it, and the instructions state to tape it up and move it out of the way).
Continuing on in my troubleshooting, I have identified the Condenser coils are extremely dirty with weeds and grass. I have also identified the blower fan is full of dirt and dust.
I have a few questions which would really help me in continuing troubleshooting.
1) Can the condenser fins be washed with a garden hose after sprayed down with condenser cleaner? I have read different opinions online regarding this matter (I have seen some units where the fins/coils seem to come off the unit, and others where people spray the unit with them attached). I don't know what kind I have. It seems kind of sketch to wash the unit with a hose when there is electrical components inside. I'm a huge fan of the shop vac in case I can use that on the fins, as well.
2) Here is a picture of my blower fan. Can I take my shop vac/compressed air to this bad boy without damaging it? I don't know a lot about HVAC, brand new to all this. I am asking so I don't damage it further.
EDIT (Removed the pics to my dirty blower, thanks for the answer).
@Ryan Smith -- I looked up the Model number I found on the evaporator box above the furnace.
While I didn't find an exact match, I found the newest models have only 4 screws holding the cover on.
Here is my setup:
As you can see, I have some kind of tape covering my cover screws.
Looks like my top line can just pull out (Looks like a fit plug that pops out), and the bottom unscrewed... and I can check out how clean/dirty the evaporator coils are.
I don't know how (And don't have the tools) to do a test from the supply side, but I think there's still a benefit in being able to take this box off in that I can clean the coils off. Agreed?
Also, you told me to check out my ducting in the crawl space (I have a ranch style, so nothing HVAC in the attic) for leaks. I didn't even have to go that far. There's a hole in the duct right above the evaporator box. I posted a pic of it in a comment below.
Based on what I've seen so far, I'm not going to be surprised if the rest of the duct has holes all through-out... plus dirty evaporation coils.
Thanks for the help.