A/C and heater not working

Hello. Let's start with checking for power to the blower at it's connector. I'm attaching a couple of images showing how to replace the blower. What you need is a voltmeter or multimeter. If you don't have one of those, that guy you know who has a bunch of tools probably does. If not, you can pick one up at a parts store or hardware store for around $20.00, sometimes cheaper.

What you're going to do is hook up the voltmeter/multimeter to the blower's electrical connector with the meter set on 20VDC. Then you simply turn on the heat and see if you get any power at the connector. You should get varying amounts of power depending on what speed setting you have it on. No power at all indicates that we need to check fuses and the blower Resistor. I'll get to that in a separate post. If you're getting power, replace the blower. You can get one online for cheap. The next thing to do is to check for power at the resistor. I'm including images showing how to access it. Like with the blower, you're going to start by looking for power there. If there's power to it but nothing teaching the blower, then you need to replace the resistor. If there's no power, we'll need to dig further. For now, let's start with this and see what we find.