Friday night service call on a walk-in freezer. Ironically, this is the one that I had. A few guys have watched my videos, a Friday night service call where the defrost heater shorted out against the refrigeration line. This is actually the new coil that I had replaced it with custom wood called me and said it was all frozen out.

He'll obviously see ice on that side and then, if you look over here, there kiddo fine kind of weird how it's just some of it. But anyways I'm gon na go through it all figure out, what's going on, get a deep frosted. So this is my electrical cabinet right here up in the sky, walk-in freezer system, gee time clock right here, system Chi looks like we're about to go into a 28-minute defrost right there, so we're gon na go ahead and force it into defrost and then we'll test. The system out, let's see what it does, we're going to go in to line one 200 volts.

That's good! Now we're gon na go in to line four. We should see nothing and to line four and quick tout a defrost. Let's try that again and to Lyon. For nothing into line three, Oh a so that's correct! I don't know why I clicked out a defrost.

I might return to super we're gon na. Let it run in defrost for a minute to put and probe on here, we've got four Hambridge 8.69 seems a little bit low for the amperage. Maybe not it's a newer, coil Tam's, I'm gon na do is I'm gon na leave that on there for a few minutes and I'm gon na time this to make sure it doesn't timeout, we should be defrosting plenty good in there right now, so showing you guys. This a thousand times great a drip loop and run your line, so that was ripping over it.

Keep it out of the customers way thinking about the customers, best interests, nice and clean, no big giant mess, so the unit ended up timing out of defrost within like five minutes, and I had set it for like seven D, just to help me defrost, the coil And if you look at it from my understanding, I was also interested only one side, so I stopped this side has a little bit down at the end, the very end over there, but mostly right here. But if you look at this think, what's going on here, yeah the limit switch, this is my defrost termination switch there's only on this side of the coil, so that would make sense why it timed out, because there's not ice on that side of the coil. So I'm gon na get a defrost, I'm gon na, let it run in a defrost wall and taking the fan guards and fan blades and stuff out and then we'll leave the drain pan attached and hose it from the inside. These ceiling mount of coils always suck because the water gets everywhere.

So when you take these out, put the screws back in not tight, but just snug them back in so that way, water doesn't leak out those holes, and then you could just hose from in here. You know all the ice away and stuff. So if you look down this, one has just heaters underneath the coil on each side, there's a heater down. There see the two things coming out there and they just run on the bottom side of the coil.

So I've got my amp probe on this one and I'm reading four amps, which makes sense, and then I was reading like eight amps up there on the roof shelf, with my aunt probe on the other one and then we'll check that one and the other ones. Reading for up so both of our defrost heaters are working, so that's a good sign. So what I did up on the roof was. I just took the X terminal wire off of the X terminal, so that way it would stay in defrost.

So it's ignoring the coil temperature at this moment. Okay, so by leaving the heaters running, while I was taking the motor guards and the blades off just let it run that much long rasaan making use of the you know time to start defrost in that coil. But inevitably, I'm gon na go up under the roof right now shut this thing off, pull these motors out and then defrost it so, like I said, I'm gon na do it from the inside out. Okay, I just put the fan motors back in coils defrosted.

We still got to get down there in the expansion valve section. These Center mount coils ceiling. Mount coils are very difficult to defrost. Without making a mess, you've got to be very slow, there's little drips here and there I've got very minimal.

This just frost on the floor, you know, but you want to try to be careful because you don't wan na make a mess on these guys. You notice there's just a little bits of frost that I couldn't help so just nice, and so I just put the motors back in I'm gon na go ahead and defrost the expansion valve section, real, quick and then we'll keep going. It looks like there's still like a little bit of ice on the ceiling we'll get to that one thing I want to point out, if you guys have done these silly amount of coils they're pain in the butt, because you can't really defrost from the outside or At least you didn't used to be able to do that, but heat crafts changed them. I got ta, give heat craft credit, they improved these coils.

You notice there's a lip there now, a pretty large lip, so you can go very slowly with your water hose and spray so long as it doesn't drip over the drain pan it used to be that the coil came right up to the edge, and so you Couldn't defrost it from the outside, but now you can, which is kind of cool. So so it looks like I missed a little spot over there, so I'm gon na get that too. So after everything's drippy and that's the little bit of frost. That's on the floor.

That's really just from the dripping off the ceiling, because I was very, very slow when I was defrosting the coil, but it's all back together. All the defrost heaters are working everything's, good kind of have a theory that it's these boxes right here. I have a feeling that they're stacking them all the way to the ceiling and blocking the airflow from that side of the coil that or someone didn't shut off the switch when they did the delivery and it wouldn't ever defrost that site completely. If it froze up solid because of the limit switch being on this side, so we'll see we'll just tell me keep an eye on it.

I'm not gon na spend all night here dinner, so I went ahead and powered the system back on set the time on the defrost clock. I don't see need to put my service gauges on it right now. What I'm actually gon na do is come back tomorrow and follow up just to make sure everything's good. The manager kind of told me a story that they found their delivery driver that had left all their food outside of the walk-in cooler, propping the door for the freezer and the cooler open on Thursday and today's Friday.

And they actually took the video of it because they thought there was gon na be a problem, and then they called me out today saying that it was iced up so more than likely, it was just that so, like I said I'll follow up tomorrow, I set The time on the defrost clock and we'll come back tomorrow and see if it has the correct time on it, that's pretty much it so it's coming down in temperature. It's gon na take some time because it's 25 degrees in there it's gon na get down to negative 10 all right, so this was a walk-in freezer service call. Ironically, like I said in the video, this was the same walk-in freezer that I had the defrost heater blow a hole in the coil, and this was actually the new evaporator coil anyways. The unit was frozen up.

What I actually found when it was all said and done - we confirmed that the delivery driver the previous day had left the walk-in freezer door open for a couple of hours. He they come in. They get their deliveries when they're, not in the restaurant, so that they called a key drop delivery. So the delivery driver has a key to the restaurant.

So when the restaurant manager arrived at 7:30 a.m. they found that the walk-in freezer was left open, along with the walk-in cooler and all the food was filled in the freezer, the cooler and propping all the doors open. So that's what we found was the problem in what caused the walk-in freezer to ice up like it. Did you notice that I didn't put my service gauges on this unit? Okay, it was late on a Friday night.

I didn't see the need. I actually ended up going back out the next day, just confirmed that everything was still working on the system. Through my service gauges on there, refrigerant pressures were looking good. I was running a clear sight.

Glass I pumped down the receiver, confirmed that it was 3/4 of the way full for the headmaster, so everything was good with the refrigerant charge. I had also in the video set the time on the time clock before I left and when I came back out the next day found that the time clock was holding the correct time, so that confirmed that the defrost clock was also working. Ok, as far as why the coil iced up the way that it did remember those evaporator coils are not meant to ice up that much okay, that defrost termination switch. That's inside that coil is meant to terminate the coil when it.

You know when it gets to a certain temperature and that coils never like, I said, meant to ice up as much as it did. It's only meant to have you know normal frost on it, which is normal because of the way how cold were getting that coil. So it's never really gon na completely melt that much ice or the amount of ice that was on it when we went out there. Okay, so that's why and it was melting the ice on both sides, but it was just so much that it couldn't keep up.

Okay and because the defrost termination sensor was only on one side of the coil, it obviously would melt that side, but then never fully melted the other side. I also think that those boxes that were stacked up alongside the coil have a little bit to do with it. I really can't get mad at the customer, because this is a chain restaurant and every one of the the restaurants that I go to. They do.

The exact same thing, so it's hard for me to run in there and say that is your problem, stop doing it you're doing it all wrong, because then they're just gon na say well, we do it at every restaurant. How come it's not affecting us there? I don't like it it's not right, but it is what it is and there's not really much. We can do to to eliminate that problem. Okay really appreciate you guys taking the time to watch my videos pay attention in the show, notes, lots of great information and then also popping up right now or some channels that I recommend you guys check out subscribe to.

These two guys have some great content, and you notice too, that I recommend other channels. I kind of rotate around to the different channels that I watch there's a lot of YouTube channels out there that are great okay, so give them a shot, and you know let them know what you think. Okay, see you guys on the next one.