Coils on AC are frozen

Run the fan as well. That should help it thaw.

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I just replaced the filters. Everything in the attic is dry and not frozen and the outside unit isn’t froze. Filters were clogged to the max. Guess I need to set a reminder to replace them a little more regularly.

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you would be surprised how often people pay a service guy to find the filters plugged solid.

had one lady tell me she changed them regular every 3 weeks. the one i took out had 1/4" thick matt of dust on it, sure lady, that aint 3 weeks of dust

just to be sure leave the fan in the on position just for tonight, that will ensure its 100% thawed out and there is no ice left inside the coils. flip it back to auto in the morning.

I just had this issue for the last few months. Evaporator coil would ice up and the AC system couldn't keep up.

From my googling, that happens because either

1. There is a lack of airflow across the evaporator coil, causing the "coolness" to freeze condensation onto the coil. As the coil becomes a frozen block of ice, it becomes harder and harder for air to pass through, eventually causing your system to not be able to run effectively until you melt the ice block. Other posters in this thread have described how best to do that - turn the system off and run your fan continuously for ~ 1 hour.

2. There is a lack of sufficient coolant in your system. Ideal gas law tells us pressure and temperature are positively correlated, meaning as one decreases, so does the other. In a system low on coolant, the pressure in the coolant line significantly decreases, causing the temperature of the line to significantly decrease as well. This decreased temperature on the coolant line causes your line to freeze that condensation from the air onto the line, from your compressor all the way to your evaporator coil. This lack of pressure also puts undue stress on your compressor since it's having to work so hard and for longer to just maintain whatever pressure it can.

I personally was short several pounds of R22 coolant in my line. Rather than pay the ~$1500 it costs these days to refill it and fix the leak, I just bought a new system. Rather bite the bullet now on the new system than have paid the money to refill the old coolant and then have to buy a new system right after anyway (my system was about 20 years old).

I went up and felt my coils in the attic and the coils in the outside unit. No ice buildup on either. Air was blowing 80 degrees so I figured it was trying to cool but couldn't turns out the attic is 80 degrees (spray foam insulation is great).

Went and bought a multi-meter this morning to test the capacitor and the condenser capacitor was toast. Found an electrical supply locally that just so happened to have one in stock. That same one was the one he ordered a year ago and nobody ever bought it. Back to blowing cold again. Ordered a couple of spares online just to have on hand if it goes out again. Those things never go out when it's 70 degrees out.

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I just replaced the filters. Everything in the attic is dry and not frozen and the outside unit isn’t froze. Filters were clogged to the max. Guess I need to set a reminder to replace them a little more regularly.

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It is not that, it is probably the capacitor or low freon.