 This video is brought to you in part by TrueTech Tools. Quality tools, essential support. All right, so we've got us a walk-in floral cooler here that I believe has just recently converted to 407C, possibly a new evaporator put on it. And it's not cool. They just turned it on. I guess it's been off or something. So anyhow, put on the gauges. Wanted to see where we were at on our pressures. And we're running right out of 17 suction pressure, which comes out to a negative 2 degrees, which is a little low for a cooler. We know it's probably low. I don't see anything in my sight glass. It is at least green, but it looks to me like it's probably completely empty. We probably have a leak, to be honest with you. You could look to the leak right away, or we could go ahead and get it charged up because that compressor's hotter than heck. I just want to make sure everything's working right before we waste too much time looking for the leak. It's going to be probably either one of these flare fittings here or possibly inside. They all look like, I don't see any oil in any of those, but we're going to go ahead and just get it charged back up. It's probably only a couple pounds that needs any way. Then we can start investigating and see where the leak's at. So far, I've added five ounces to it. The compressor pretty much started slugging right away. It got really cold. It's not dropping in the suction pressure there, which makes me think it's not pumping at all. Let's go ahead and pump this thing down and see if it can pull down into a negative. I have a bad feeling we may have lost the compressor already because it's chugging there like it's just setting in there. Nothing happening. I added, like I said, a few ounces to it and it just started acting stupid. I'm valve all the way in, front seated. We should be pulling back even right on my hose. Lucky there. Nothing's changing. Let's go ahead and hook up our high side gauge here. I can feel the solenoid, it's vibrating, it's hot. It appears to be working. They didn't put a T on the high side, so actually no great way to check the high side pressure. That would have been a good idea to put a T on there so that you could have just put your gauge on there now, what you're going to have to do is bypass your fan control, valve it off, unhook it, just a lot of hassle for nothing. It's really looking bad, like we might have lost this compressor here. We got our screwdriver wedged underneath there. Hopefully that'll keep it running the fan. If not, we'll have to jump it there. Let's go ahead and backseat this, which I think I might have already done it. The head's back seated now. We should be able to take that off. Of course, I knocked that out when I dropped my pliers or it fell out. I'll tell you what, we ain't going to fool that. You got to be careful if you're going to do this live. You can easily short something out. Go ahead and get our pliers. Just got a little bit of a refrigerator in there in that. My gauges just went overboard. Is that what we did? Yeah, we went so high that my gauges overdid it. OK, we've got a major, major issue here. I've never seen my gauges do that before. This thing is either not dumping on itself or something, but that literally just took the gauges higher than they can go. And I think these can go up to 800. Try it one more time. Really, it can shuttle off, but any damage you're doing, been done. Barely can undo my hoses there. So we're either gummed up there in that solenoid or somewhere. But we are, we are, or we're massively overcharged. I don't know, something ate right. Let's go ahead and get this thing turned off. Now let's think about this for a second. If we have a restriction, it should have pumped down into the receiver and shut off, but it didn't. All right, so here's the evaporator. Lines that comes in. So we've got the outside heated off. The inside is on some fan. So let's go ahead and see if we can start Gauge says negative five. It could be because it was in a cold area. Now it's in hot or vice versa, I forget. But my suction came up. So we got here, if we open this valve up. We are open and we're at 180. And I see refrigerant bubbling through there. Kind of an oddball one, say the least. I backed it out when I did that, so I didn't shut it. If anything, I should have been able to crank this thing in and make it pump down. I guess worst case scenario, we can crank it in, turn it on, see if it can pump down, which who knows what it's going to do. The suction came down. Or I should say the suction came up. And with the suction coming up, it means it was actually as low as it could go. We were at 18 earlier pounds, a little scavenger hut going on there, don't we? We caught that bee, he's going to eat him. There's another ant, I don't know what they're doing. Let's kick it on and see what it does. I don't think we're going to need any refrigerant anytime soon here. Let's go kick it on and see what we got. Hey, we're building head pressure there. We're at 315-ish. Everything about this says it's overcharged. Now the pressure's coming down. What's funny is our suction was super low to begin with. I had five measly ounces, and it goes berserk. This is very, very odd. OK, so we pulled a little out, and I believe it pumped down and shut off. Either that or it went off on overload because it's kind of vibrating. I could be picking things up from, oh, that's the solenoid. That's all cold. It's been in since 16. I finally found some history on it. Very, very odd that it did what it did. We may have a TXV that's malfunctioning. I suppose that's a possibility. Let's go ahead and open this up, see if it goes through, and comes back through. Head pressure's dropping. Suction's coming up. It kicked on. Now you're probably act fine. I mean, I only removed just a small amount. Now suction's up higher like it should have been. It's not too horribly bad. The other minute to stabilize here, this is really odd the way it's acting. I've never seen it build that kind of pressure before. Makes no sense how five ounces did that. This thing has got to hold more than five. The receiver should have easily handled that. The intercoil's clean, so we're good on that. Somewhere around the 87 degree mark. So 97, 107, 117, so we're about 20 something over ambient. Suction's a lot better than what it was. It was super low. I mean, I don't know. It's been off since April. So I don't know if Tolenoid didn't open all the way. There's no sense. That little bit of extra frigor must push it over the edge. No idea how much it holds. That wasn't wrote down. Now it acts like it's going to work just fine, which is really great. We'll pump it down again, see what it does. We'll probably overcharge and go up that high. 300 ish area, and that's definitely over. All right, so we heated that up. Hopefully you can see that just the very top barely has any room at all for expansion. Just heating it up took my head pressure up to 325 from two to 50, 60 ish area. So we're going to have to remove a little bit more. And then we're going to need to check this thing and find out what exactly is going on here. I have a feeling that the TXV was not feeding properly. And whether or not it just started doing that, or maybe it did it before, and people added to make up for it, I have no idea. Maybe it just started not sure right at this point. Let's go ahead and get that level to at least the 80% mark. So we've got room for expansion. And then let's see what we can do with that TXV. See if it's needed and set, if it needs adjustment, what exactly is going on. OK, you can kind of see there that now we're about the 70%, 80% mark area. So let's go ahead and open this back up to see how she acts. Had a little bit of heat right there. Brought it up to 350 pounds ahead. So let's go ahead and open this back up and see what she does. We've gone about 40, which is about 23 degrees. So we're good on that. Looks like we've got a solid sight glass still. Let's give it a little bit, see if that changes. Hopefully not. Four ounces wouldn't have done that much to it. All right, so you can see the TXV and they're sweating pretty good. Hard to check super heat on this one here because there's no tap for the suction line. And there's no suction line to get on to. All of this here is pretty much sealed up as well as ones where you kind of hope it's right. It's getting cooler in here. So it's 89 degrees with the reflectiveness off the panels there. So at 89, let's go 99, 109. We're 20 degrees over ambient. And suction's right under 35 degrees. It's coming back cool, which is good. Kind of surprising to go ahead and check super heat on that. I went ahead and put a full nose looking refrigerant tea on there and the fan cycled off and back on again. Cycled on about 106 degrees. Our suction temperatures starting to drop, which is good. Getting down to 30 degree mark, which means we should be probably about 35 in there to 40. Superheat's running at 32, which is good. We've got at least our 20. 20 or 25 for compressor super heat. So far, everything's looking pretty good. And I still am not 100% certain what exactly caused the low suction though. Let's go ahead and pump it down one more time here. See how it does. We might have a TXV acting up. I mean, that'd be the most logical overcharging that shouldn't have caused it to do that. Not that I've ever seen. See if it pumps down a little easier this time. It should start dropping after a little bit here. Watch our sight glass over there. Kind of see it starting to bubble and lose the last remainders of refrigerant. It might still be a little too much in there. Definitely more than the five ounces that I put in there. We're still even that valve off all that time right there. Now starting to empty that sight glass out. This thing is taking forever to pump down. Finally. Good grievous. I don't know how it could have gotten so overcharged. Supposedly haven't had anything done to it since 16. That's enough to drive me nuts. Man, somebody's already got it stripped out. Just kicked it back on. Comes our head pressure on. About one of five, I think, is what they had it set for. 107. I did talk to the customer. He generally just flips the breaker off and does not let it pump down. So we could have had refrigerant in the evaporator and it migrated out to the compressor. They did a compressor change. Supposedly potentially in the last year or two. So it's not as far back as I thought. My history stuff's not real accurate. Unit could have had oil pumped into the evaporator. I'm not sure. They definitely probably didn't help the compressor a lot with the oil setting in it. Why it had, I mean, all I can think of maybe the oil was blocking off the TXV. So we removed it a little bit more. It's pumping down a little quicker than what it did last time. We may need to pump or remove a little bit more out of it. Pressure's still pulling up and touch but it's coming back down, which is a good sign. But finding that information there about it not getting pumped down before it shuts off, it told the customer to turn this thermostat up before he shuts it off. And then that way it'll shut off on its own, then kill the power to it. That way everything's backed up against the solenoid, which is right there. And that keeps the refrigerant from migrating back to the compressor. This has been shutting off, I think around 10 area. We're all going close there. We'll check that level and that receiver again and see where we're at. We've pumped this down a few times, at least probably four or five times. It's been running pretty good. It's hit temperature. What I ended up doing was replacing the liquid dryer there. Now we got a date on it. This one here, I don't think that's only a year old. I mean, it's quite a bit of rust. That could be wrong. I would think they would have replaced it when they replaced the compressor. That was seven, maybe 19. But so anyhow, we replaced the dryer just as a precaution to see maybe, maybe there was some moisture in there in that TXV. I think the TXV was my problem. I mean, it definitely looks like it was a little bit low on charge. We got a little bit of flashing going on there, I think, just that touch. It might be hitting temperature again too though. Now I wish I would have measured what I had in the bottle beforehand, instead of just running it in there. But unfortunately I did not. So I don't have an accurate measure on how much I removed. For it to be low suction, the only thing it would make sense is that TXV was sticking. It looks like it's a newer TXV. So it just makes no other sense to me as to why it did what it did other than the TXV. Could have been an ice crystal. Could have been just some gunk in there. Maybe I'm not shutting it off properly. Maybe oil build up in there, pump the oil out. I'm not 100% certain. If you guys have an idea, leave it down below. I'm gonna watch this for a minute. And if it doesn't start going solid here, I'm gonna just give it a little squirt to bring it back up. But it looks like we're pretty much about there. Anyhow, this is kind of an odd one. So guys, hopefully you enjoyed the video. If you want to see more like it, make sure you give it a thumbs up and subscribe. Until next time, we'll catch you on the next one. Later.