Vernon Marshall at HVAC Technical Academy – Central Florida

HVAC Technical Academy
Sanford, Florida
September – October 2026 Session

Hi, my name is Vernon. We’re here at HVAC Technical Academy. Doing a great job with teaching everyone and giving us the proper knowledge and guidance.

Today I want to talk to you guys about low voltage wiring. It’s a big major component of the HVAC system. So here in my hand I got some thermostat wire. This is the low voltage wiring we’re talking about in the HVAC system.

They carry 24 volts from the transformer which the transformer steps it down from 240 volts to 24 to be able to send the 24 volts out to the other components. With these wiring so far the general basic like understanding of these wirings.

So starting off with blue would be your common. Red would be your 24 volts or your power. Green would be your inside air handler air air handler blower motor. Yellow would be going out to your outside unit to the contactor which would initially turn on your compressor and your condenser fan motor. And then we have a white that usually goes into the heat strip or your W terminal.

With these wires we’re able to communicate or send some type of controlling signal towards the other components to be able to run it properly. Say there was an issue with one of these wires. Say that you had some landscapers come by for the day. They cut the grass. Unfortunately one of the weed eaters end up clipping one of your wires. They may have clipped one of these or clipped all of them. You never know until you go to check them.

But a way to to test to see if they did clip a wire with would be able to get one of your multi-meters. We would set it to the MFD setting on here. And then we’ll set it first select to get it over to the continuity. Once you get the continuity, that’s where you test the resistance. Basically it’s showing if your wire is able to pass voltage or pass current. If it was snipped or cut, then it would definitely not be able to pass the current.

Starting off to make sure my voltmeter is working properly, I would test it by just touching each other. And once I hear that beep, it’ll come up with a an amount as well or a reading. And then that’s how we know that we have continuity. Say right now I could test common. I’ll test it on both ends. And I got a reading and a sound, so I do have continuity. In the event that the landscapers did come by and snip your wire, you wouldn’t get any reading or any indication of a sound with that wire. That’s how you would know if the wire is broken.

And I believe that’s all I got right now on the low voltage wiring. So I do want to thank you guys for taking the time to watch my video. And I do hope that you guys do take a chance to come out and have a good chance at testing your low voltage wiring as well. So

HVAC Technical Academy
Sanford, Florida
September – October 2026 Session

Hey, good morning. It’s Rhashaad Owens from HVAC Technical Academy and today I will be explaining the recovery process.

So, first thing first, you want to make sure you have all your equipment. You want your vacuum, you want your gauges, you want your you want your high pressure hose, you want a refrigerant hose, and you want an extra hose that you that’s going to connect into the cylinder R14 cylinder or whatever refrigerant you’re working with to recover.

Second, you want to make sure you have your scale on to weigh the cylinder and make sure that it’s on, of course. And when you weigh it, you want to make sure it’s zeroed out on your scale.

Power on. Wait a few seconds, of course. And you should have what’s ever remaining in this cylinder, which is Oh, cut. Oh, it’s not. Okay. So, you have 24 lb inside the cylinder. So, we have enough space to add more refrigerant to it.

Okay. So, after you weigh it, you want to remove that. You want to connect your extra hose, which is going into the vacuum from the vacuum to the cylinder, and that’s going to be located in the out port of the vacuum. You want to connect it to your vapor side because the liquid line, of course, will be more slower and the vapor helps it get up quicker.

Okay. Once you have that connected, you want to make sure double-check that your refrigerant hose is going into the in port of the vacuum, which is on that side. You want to double-check, make sure your liquid line is connected to the I mean, make sure your high-pressure side is connected to the liquid line.

Okay. Then, once that once that start turn your gauges on. Make sure everything is ready. You flip You You begin the process with a recover. And make sure make sure everything is open. Then, let’s let’s That’s the recovery process in a bubble. Yeah.

HVAC Technical Academy
Sanford, Florida
September – October 2026 Session

Hello, this is Ravieon from HVAC Technical Academy and today I’m going to be showing you guys how a condenser fan motor works.

All right, so Well, obviously we already took it off. But I wanted to show you guys how how corroded this thing is and this is how it can go bad. Rust, just natural causes and much more. So, we see the it spins, the fan spins on it, but this is not the motor, it’s actual self. The motor is actually right here. This big boy.

So, these things can deteriorate over time and simply just need a replacement. What the condenser fan motor does is it literally takes the air flow, well, it’s just an air flow. So, if it’s not coming in here and the fan’s not spinning right here, you have a lack of air flow and that can cause ice and ice and more.

Well, thank you today. Again, my name’s Ravieon and HVAC Technical Academy here and yeah.

HVAC Technical Academy
Sanford, Florida
September – October 2026 Session  

Hello, hello, my name is Max from HVAC Technical Academy. Today we’re learning about a contactor. This is a single pole and this is a double pole contactor. Just getting the way.

All right, so I’mma walk up to Miss Smith Miss Smith. I knock on Miss Smith’s door first, right? How’s it going Miss Smith? She’s not in a very nice mood today. All right, she said she heard a little clicking a little rattling like something like this. So in my mind contactor go don’t got the what’s got the this take that off I’ll take that off I’ll look but I shut off the power first but we don’t got no power out here since we got all right.

Well, this is a high voltage right here and this goes to your transformer and then after that I’m condenser fan motor right here and then this says voltage so I’m guessing when it was burnt all you heard is all she was hearing was this and then told Miss Smith is the contactor contactor went bad I’ll replace it for you.

Thank you for watching HVAC Technical Academy.

HVAC Technical Academy
Sanford, Florida
September – October 2026 Session

Hi, my name is Jacqueline. I’m here with HVAC Technical Academy and I will be talking about capacitors. What they are, what what they do and how you and to test them and where they’re at.

So this is a dual run capacitor. If you see on top here, there’s going to be these terminals [snorts] that there’s a common, a herm, and a fan. And these are going to be connected to the herm is for the compressor and the fan is for the condenser fan motor. And what it does basically it just gives a jump start for the condenser fan motor and the compressor.

And they go bad normally due to like power surges or you know because they’re hermetically sealed can’t fix it and just wear and tear. There’s not really a lifespan on them. Just goes bad when it goes bad.

And how to test it is on the microfarads. This one has the range of 70 plus five microfarads and 7.5 range capacity. So we’re going to go to MFD and you’re always going to test common to herm and common to fan. So we’re going to do this. So So we got 66.1. This is good. And 4.8. All right. All right. So, this one’s still pretty good.

Yeah. So, that’s how you test the capacitor. And if your condenser fan motor isn’t working, it’s most likely always going to be your capacitor. Just, you know, wear and tear, power surges, not lifetime guarantee, but yeah. Thank you for watching my videos on capacitors. Play.

HVAC Technical Academy
Sanford, Florida
September – October 2026 Session

Duwayne Dukes — HVAC Heat Strips

Good afternoon. My name is Duwayne Dukes and welcome to HVAC Technical Academy. And today I would like to talk to you guys about heat strips. Heat strips, one thing that they do for your house and home as well as your AC system is that they provide heat for your home when you call for it when it’s cold outside. They’re found mostly in No, they’re found in straight cool systems as well as your heat pump systems. And they’re always normally located at the air handler section of your AC units. They’re located on top up here. And commonly known faults that happen or commonly known things that happen with your heat strips is you’ll go to turn your heat on and next thing you know you’ll get smoke or you’ll start smelling something burning or smoke coming out of your your vents. And that that is caused from dirt and debris from the air flow coming up on your heat strip and it builds up on these coils. And all these coils do is pretty much get hot when you call for heat and it passes the air right over these coils and they come out as heated air in your home.

And just like I was saying, those coils will build up dirt, dust, and once you go to turn them on, these coils get very hot and it burns off that dust and turns it into smoke. Now also I would like to show you how we can test and how these are replaced. Heat strips when they do go bad in the chance, there’s four screws holding them up inside of your air handler. Those just screw out and your heat strip is able to come out as such. And then also to test for heat strips I take my voltmeter, set it to continuity. And we want to test if we get power through it. And as you see this one has continuity. You know breaks in the line. And that is your heat strips. And then with this one I test it for continuity. Oh, that one. That one actually came on. Test it this one that came tested bad at first, but now that’s also a good heat strip as well. And then it goes back in your air handler just as such.

Four screws on both sides. That’s your heat strip. Thank you for watching this video. I’m Duwayne. See you next time.