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Hi I'm Brian and I'm here to help!
The most common reason for this is your furnace's a-coil condensate drain line has a plugged drain switch it and the drain line is clogged. The switch is a low voltage two wire device usually installed in a tee where the drain makes a turn down but could also be right near the drain connection to the coil. They can normally be pulled right out and the float should be checked for proper operation. The drain line should be cleared out with a wet vac or compressed air. That is the most common cause. There are many others too though. Let's start with that and go from there.
Let me know what you find.
No problem, I understand. The device I was talking about is inside at the your furnace in the drain line from the a-coil. But checking the power to the outdoor unit is important too. That was the next step. Your disconnect looks fine (the device in the picture you sent). You should check the breaker box too for a breaker labeled AC UNIT.
I will keep that in mind with my responses. The only tool you might need if the drain is clogged is a wet vacuum or Shop Vac as they're so often called, to clear the drain if that's the problem. So, check your main panel for a tripped breaker and check the drain line at your furnace for a small two wire device stuck into a fitting in the drain line. We'll go from there.
No, worries. No, you shouldn't have to open the furnace. The drain switch will be on the outside of it. Let me see if I can find a pictorial example...
If you have a drain switch, it could look like THIS, or like THIS
Click Here for your picture with your drain location. If you have a switch it will be in that line.
Click Here for another instruction that may help. The pump I am talking about will look the one in THIS PICTURE.
Sorry, THIS PICTURE is of a typical condensate pump on a furnace. If it quits working it will stop your unit from working.
Yes, I got your pictures and sent a couple of them back with annotations.
Click on the blue highlighted words in my responses please.
Sorry again, my link isn't getting embedded right. CLICK HERE for a picture of a typical furnace with a condensate pump attached.
Wow, I will just put the link in this message, sorry for all the trouble!
You're welcome. I'm sorry I couldn't help get you cooling tonight and for most likely thoroughly confusing you with all my links. That condensate pump in the last link I sent is a very common culprit of systems like yours not cooling. Checking that unit and your breakers is really about all you can do without tools.
Best of luck and best regards.