Nice timing with the hand tap on the downstairs condenser!

Probably back emf generated by fan rotation hitting compressor. Can be fixed with double pole contactor with fan hot moved to bottom. Isolates fan from compressor.

It's caused from the fan motor. Disconnect the compressor and it'll still make the noise upon shut down. Usually only does it when the pad is not on regular ground but on rocks or cement. Tighten the fan mounting bolts as tight as you can by hand and put vibration pads on all 4 corners of the unit. It's worked every time.

Forever grateful for your a videos, first summer as a service tech and you ans your videos have helped so much. I see so much wrong in a majority of homes I work home , super neglected and i get overwhelmed. I end up at your channel, thank you sir!

Your customer should hear my water furnace compressor at turn off. 14 years old and it has hammered at shutdown from day one. Still running fine. Great videos Ted

You service some absolutely beautiful homes.

Nice to see a pair of new Trane condensers setting side by side.

Although there may be some back emf factor with these units causing the fan to jerk, I believe the actual clunk can be coming from a loosening of the fan blade shaft bolt. I observed this happening with an Am Std Silver Series CU about two years ago. The noise started like the sound of these units and gradually worsened over a week or two. It eventually resulted in the fan blade falling off the shaft and damaging the compressor discharge line as well as the blade itself. .

there is another youtube tech who installed Carrier and had the same customer complaint. A loud bang when turning off. He installed a delay timer to turn the fan off a few seconds after the compressor shutoff. It worked well. The noise was completely gone. Just an anomaly that the one specific unit resonated when turning off. Staging the shutdown solved it

I hear Copeland scroll compressors on Lennox units shut down hard all the time like that. Just a lot of mass moving around then all of a sudden stops.

I had a Trane 5 ton unit installed in my new construction 8 months ago and it has the same loud noise when the unit shuts off! The unit runs great and really cools my house in southwest Louisiana. It has been really HOT and Humid down here this summer too!

Always honest and professional love it brother ❤ not every call is a win but we stay professional consistently finished my last call as a recall was out there last week for annual maintenance she calls us today saying system is down come out right away she explained to me she had a pest control out there two days ago the pest control guy left the power off in the crawl space which killed power to the unit always feels good to be Superman flipping switches

As I was watching intently and turning the volume up, I got scared I was gonna get a full screen scary face and scream from back in the day. 😂

My trane has noisy shut off too. Almost 3 yrs old now & no issues. Just different from other brand I had

The good ol' 410A jolt. 😎👍

Good little vid Ted ... Thx

Dam for the money you have to spend on these units, it really shouldn’t make any unusual sounds or vibrations cycling through a shut down sequence ? that would probably indicate a less than optimal life span of trouble free usage down the road? It’s like buying a new car with a bad bearing in the engine, it’s all good until it runs out of the manufacture warranty down the road and then it’s on your dime. Just change out anything & everything in that unit under the factory warranty… until it sounds right. make it run like the other unit next to it does. Kinda hard to tell a customer that “oh it’s ok that’s normal”, when you have a comparison unit sitting right next door and it’s working without the issue.. When you’re retired and done and that unit kicks the bucket down the road , their in for more downtime and aggravation..

My American Standard has that compressor shutdown rattle too, but hasn't been an issue for the 9 yrs I've had it make that sound

That was funny right as you touch the second unit turned on Great video

Normal. My XR14 has been doing that since day 1. Running trouble free for 8 years and no problem handling the 100 degree days we’ve been having.

Are the compressor mounts o.k. and not split. I use to see this on some refrigeration units. Thanks

ive been working with newer compressors. the ones i learned on in school dont necessarily make that noise because they are older units to be trained on. on the case with the newer compressors, they all stop like that. i just worked on a year old system and when i pulled the disconnect it make that exact same noise. its a manufacturing issue as far as im concerned.

My Rheem does the same thing as the smaller one...always has and actually sometimes its louder.

I often get a whistling sound from my system after it satisfies. I assume it's the pressure equalizing in the lines/coils.

Do you think that the compressor could be loose and when it torques on shutdown that it moves slightly? That definitely doesn't sound good (acceptable) on the first unit especially if it's new. I'm not in the business but as a consumer if I paid to have that put in I wouldn't want it to sound like that.

The smaller unit seems like the compressor shut off bump is louder.

We had a Trane 5 ton installed in Jan 2021and ours makes a rattle/noise when it shuts off.

I bought a brand-new Amana 4 ton, and it does the same noise at stop. I thought was the fan blades, but I stand closed to the compressor and I hear from there and it feel like clan,clan,clan when is stop. it looks like the compressor when it stop. Maybe cause its bran new and the piston inside do that.

Good job ted❤😂🎉

I have one that makes 10-12 knocks on shutdown. Sounds like someone threw a handful of rocks at it. My service company ordered me a new compressor (scroll) but said to wait until the old one failed as it was working perfectly and using no more electricity than a new one. That was three years ago and it still works perfectly just noisy on shutdown. I don't know if it is a rattling seal or what but pressures are perfect. I just knew it would throw in the towel a long time ago but it has not.

Do you ever have issues with the scroll coming apart in the compressor?

I have the same 4 ton Trane XR. Installed 2015. Mine makes the same noise. No worries here.

I just got a brand new Rheem 5-ton 19seer installed and the compressor makes a chattering sound when it turns off, hopefully that's normal operation 😅

Backpeddling or back spin upon shut down mine does that too it's a scroll compressor kinda annoying but what're you gonna do....

I have a 2023 amer Stan silver that started doing this 4 wks after install. The installer tells me its normal with the new compressor design. I wish they could do something to quiet it down. It runs quiet and the entire system with blower installed. It’s going to get used a lot in Az. Kicker is if the rotary designed compressor wears out the entire compressor needs replaced. 10 year warranty I hope has me covered if it happens.

Scroll unloading is what it sounds like to me? My Amana does the same exact thing and it’s 10 years old and has always done it.

I have a new 3 year old system, not a Trane, that does the same thump. Mine is more at start up. I questioned it as well and was told that all the new style compressors will do this, clutch noise I believe

Mine makes the same noise. Same unit. Six years old. No problems

Hi Ted do you know or have talked to Curts the HVAC GUY?

Had this issue and trane sent me a 2 pole contractor and I was skeptical but it did work. No more noise on shut down.

that sounds like normal the valve noise. When the compressor stops there is still head pressure and motor will shutter back and forth a few cycles until the opposing forces equalize and the motor stops in a neutral position.

My Trane is doing same thing. My Tech said if I installed a soft start it would reduce the start up and shut down noise. It didn't help at all. Did I get scammed?

I've never seen a Goodman do that! 😅

Looks like the installers could turn some of the units 90 degrees to allow for easier service, the control panel and service area, if heat pump would be a lot easier to service

Some people amaze me

We have a Trane installed in 2018 and makes the same noise. If you find the cause/remediation please share. It’s mostly a mild annoyance.

Even the Copeland scrolls make that hissing noise when they shut down.

had my compressor on my new 2021-22 trane unit go out at 13 months. original compr indicated made in louisiana. replacement was proudly made in china. maybe pandemic conditions resulted in reduced quality control on new trane. but if a trane laid down after a year can you expect any mftr to be reliable?

Carriers have problems with scrolls when they shut off they make a thud sounds it’s because a valve is worn inside the compressor

Compressor sounded fine on shut down… sounded like the fan motor to my ear … I have had the same complaint from customer that has a Trane package unit.

Yes, the noise may be normal, however, what is CAUSING the noise? Is it from 'fluid shock' when a valve shuts closed suddenly?

Some customers are annoying 😂😂

Need to put some W D 40 on that door hinge giving chevy a bad name big Ted.

Mine makes a thump sound when it shuts off is it serious?

I have a Goodman that makes those sound like a mouse with slippers! LOL!

When your AC compressor makes noise when it turns off, it can be indicative of a few potential issues. Here are some common causes and what you might do about them: 1. **Refrigerant Issues**: If there's a problem with the refrigerant levels or flow, it could cause the compressor to make noise when it shuts off. This might sound like a hissing or bubbling noise. 2. **Compressor Mounts**: The compressor is mounted on rubber feet to minimize vibration and noise. If these mounts are worn or damaged, the compressor can make noise when it shuts down. 3. **Internal Damage**: There could be internal damage to the compressor itself, such as worn-out bearings or other internal components. This is more serious and typically requires professional assessment and potentially a compressor replacement. 4. **Electrical Issues**: Problems with the electrical components, such as the capacitor or relay, can cause the compressor to make unusual noises. 5. **Cooling Fan Problems**: If the cooling fan is not working properly or is damaged, it can cause noises that might seem like they're coming from the compressor. ### What to Do: - **Check for Visible Issues**: Look at the compressor and surrounding area for any visible signs of damage or wear, such as loose or broken mounts. - **Listen to the Noise**: Try to identify the type of noise (e.g., hissing, clanking, buzzing) as it can help diagnose the problem. - **Check the Refrigerant Levels**: Low refrigerant levels can cause various issues, including noise. A professional can check and refill the refrigerant if needed. - **Inspect Electrical Components**: Ensure that all electrical connections and components are in good condition. This is best done by a professional. - **Consult a Professional**: If the issue isn't easily identifiable or fixable, it's best to consult a professional HVAC technician. They can accurately diagnose and repair the problem. Ignoring these noises can lead to more serious issues down the line, so it's advisable to address them promptly.

I have the same 4 ton unit does the same thing had it installed in 2017 zero issues

Ted, Please don't oil that squeeky hinge on your work van, we all look forward to that squeek when you arrive at the next job, and open the door 😀 👍 Au

My 2014 Bryant 3 ton makes the same noise on shutdown. No problems. Normal.

I added a compressor blanket to my AC yesterday and it cut down on the noise considerably.

We get those calls all the time, nothing wrong. Just homeowners! Sounds fine to me.

That definitely doesn't sound unusual to me.

Never seen that too, should call to tech support to get some opinion about it.

I had one do that it was the rubber grommets on the anchor bolts

Have a American standard which almost a year old. It does the same thing also

Its that fan thump noise I can make it stop doing that with a double pole contactor

That was the fan motor, not the compressor.

The Hvac G.O.A.T

My next door neighbors newly installed Trane makes a loud clunk every time it shuts off. It doesn't seem normal to me.

Damn.

my carrier is 2 years old and it clunks when it kicks off, and it clunks when it turns on. it replaced a trane i installed in 1990

The scroll compressor , upon shutdown will make that noise . It's the pressure in the system that actually pushes the scroll backwards for a brief moment. It is Totally normal. On the trane csha scrolls (15 ton) upon shut down they actually turn bakwards for up to 2-3 seconds. Take is easy bro.

That's just the way a scroll compressor sounds. It's spring loaded from the sound of it.

2:16 Smaller unit switches off with clunk. 3:33 2nd unit makes no thump sound.

I have two carrier units that makes a similar noise on start up. Both units were installed when the home was constructed in 1999. They continue to perform effortlessly in the humid Louisiana climate.

Omg. Good luck with comment sir 👍

Holy moly put some WD-40 on your van door hinges 😂

I had a damn goodtime on a trane system with a bad recip the other day....

Any possibility the compressors are loose on their mounts, and just need to be tightened down a little?

should a newly installed compressor make noise on start up ? like cavitation or a "rod knock" on start up ? I'll have to record it, BUT, I am not getting the same idiot who came out the last time. Yes, coincidently I had a FIRE in my fuse panel starting at the AC circuit breaker WHILE he was here working on the unit.

Interesting...if those were mine and under warranty...I would for sure be communicating with Trane ! Yes very minor but NOT really normal so Trane should correct it. By the looks of previous comments, maybe it should have a dual pole contactor?

Hate to see his electric bill having 2 units cooling that house.

My Trane XR makes the same noise. It is only a year old.

My 4 ton does that.

I usually have to be standing around 15 feet away to isolate the compressor vs fan sounds but from the video it sounds like something is missing from the functionality of something 🤷🏻‍♂️ if they donate that unit to my not for profit conditioned space laboratory I could send them some stickers or maybe a hat

Play a video of a Goodman turning off and he will feel better

What are they talking about? That wasn’t that loud shutting down

Scroll compressor. That's what they do.

Sounds fine lol. They just don’t understand how their units work…

So youre telling me they designed that ac unit to make that kind of noise? I cant believe that. If the customer had the opportunity to “test drive” the unit before they purchased it nobody would buy one. I spent $20k to have 2 american standard units installed and they make the same noise which I was told is normal. I will never purchase that brand again or use the contractor that sold them to me.

My brand new ac unit makes same noise when it shuts off.

Trane has got be one of the best ACs out there.

Scroll compressor are noisy on shutdown

Normal sound for a rotary compressor. Their valves behave differently for a reciprocal compressor, and this is perfectly normal.

My neighbors Trane makes the same noise.

Completely normal. However you would think nowadays they would make even basic compressors quieter. They have the technology just don’t want to spend the money.

She makes a lot of noise when satisfied ey

What a waste of a call

I would have marked the units or disconnects so you and the homeowner knows which is for what floor. Should have been done at install.

My five ton does that same thing. I only hear it in the basement where the line set is exposed.