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.
That is not an ECM fan motor on that unit. The it’s definitely a known issue. With TRANE/ American Standard units going back to 2020 16 SEER units and 14 SEER. Seems like we are getting more calls about this on newer units now. We’ve had about 4 this summer so far. Their is a bulletin about this from AMS/ TRANE engineering department. It’s been mentioned already. Change to 2 pole contactor and move run winding for fan motor to L2 from T2. Same way all Carriers come factory wired. Engineering dept states it’s a back EMF issue.
yeah, back EMF from one or the other, probably compressor/cap combo hitting the fan motor, that would make the higher pitch bang, especially since it's hooked to giant noise emitters (the top and blades). compressor is generally a dull low tone thump.
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.
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..
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
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. .
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
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!
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.
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?
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
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
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.
Sadly it is just the sound they make on shut down. The compressor becomes torqued in one direction while running and the sound is the compressor immediately releasing the torque.
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
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
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 sounds like the reasonable explanation. The early type rotary used to tick while equalizing. Back EMF,resonance,moving loads around.IDK about that shyt.
Yeah idk what everyone is talking about the fan making the noise, bigger scroll compressors do it unmistakably so that’s probably why I know it’s the compressor
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 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.
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.
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.
I would first check the mounting of everything. If it were a car, i'd check the motor mounts. With this, i'd go for the fan, compressor and even the unit itself. Trane may have left out a rubber bushing.
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.
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.
sure would love for you to show me, I always want to learn how to get a customer off my back lol. please make a video on your solution to prove your hypothesis.
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.
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.
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
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?
Trane does not use Chinese compressors. Some have LG compressors, and those are made in Korea. Most include an Alliance, and they are still made in Louisiana from what I have seen. Maybe yours was a certain batch.
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.
Sadly for customers the mfg keep trying to cut cost out and keep function. Notice how much lighter a same capacity, new compressor is vs one from 15yrs ago?
I for one do not believe it's normal, maybe with these two-stage compressors nowadays but it is definitely not normal on a basic compressor, I would like to find a way to drop down to first stage before shut down, I can tell the difference in sound from first to second stage, I have a f****** geothermal unit and as loud as f*** in the house... makes you want to run and go look and make sure you ain't got no lines blown off an flooding your house...lol
Not very likely. They are torqued at the factory. Occasionally that may be the case, but not very likely. It is the sound that a scroll compressor makes when shutting down. The noise could actually be reduced by loosening the bolts just a little, but make sure to dab a bit of rtv across the bolt to prevent it from backing out more.
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.
Looked like an ECM fan motor. Same applies?
Winner winner. 🏆
That is not an ECM fan motor on that unit. The it’s definitely a known issue. With TRANE/ American Standard units going back to 2020 16 SEER units and 14 SEER. Seems like we are getting more calls about this on newer units now. We’ve had about 4 this summer so far. Their is a bulletin about this from AMS/ TRANE engineering department. It’s been mentioned already. Change to 2 pole contactor and move run winding for fan motor to L2 from T2. Same way all Carriers come factory wired. Engineering dept states it’s a back EMF issue.
Thanks for the learning! I’ll try this next time I run up on this issue
yeah, back EMF from one or the other, probably compressor/cap combo hitting the fan motor, that would make the higher pitch bang, especially since it's hooked to giant noise emitters (the top and blades). compressor is generally a dull low tone thump.
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.
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..
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
Nice timing with the hand tap on the downstairs condenser!
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. .
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.
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
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.
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!
Nice to see a pair of new Trane condensers setting side by side.
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
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. 😂
You service some absolutely beautiful homes.
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!
I'm in Lake Charles. I commented also
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.
I've never seen a Goodman do that! 😅
Goodman high static heat pumps with scroll compressor is louder than that is.
“Dad-gum Goodman”!
My trane has noisy shut off too. Almost 3 yrs old now & no issues. Just different from other brand I had
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?
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
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 the same 4 ton Trane XR. Installed 2015. Mine makes the same noise. No worries here.
Carriers have problems with scrolls when they shut off they make a thud sounds it’s because a valve is worn inside the compressor
The good ol' 410A jolt. 😎👍
Mine makes the same noise. Same unit. Six years old. No problems
So noone is recognizing that bruh got lost in his own home.
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
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.
The smaller unit seems like the compressor shut off bump is louder.
I like your videos and steven lavimoniere you 2 make great material to watch.
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.
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.
Sadly it is just the sound they make on shut down. The compressor becomes torqued in one direction while running and the sound is the compressor immediately releasing the torque.
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
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
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 sounds like the reasonable explanation.
The early type rotary used to tick while equalizing.
Back EMF,resonance,moving loads around.IDK about that shyt.
Yeah idk what everyone is talking about the fan making the noise, bigger scroll compressors do it unmistakably so that’s probably why I know it’s the compressor
That definitely doesn't sound unusual to me.
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 have the same 4 ton unit does the same thing had it installed in 2017 zero issues
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.
We get those calls all the time, nothing wrong. Just homeowners! Sounds fine to me.
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.
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.
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.
That was funny right as you touch the second unit turned on Great video
Even the Copeland scrolls make that hissing noise when they shut down.
open you listen ears..it was no hissing noice
I have a Goodman that makes those sound like a mouse with slippers! LOL!
I would first check the mounting of everything. If it were a car, i'd check the motor mounts. With this, i'd go for the fan, compressor and even the unit itself. Trane may have left out a rubber bushing.
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.
Mine is new. Makes a gun shot noise when turning on and off. I wish mine was as quite as these 2 you filmed
Mine makes a thump sound when it shuts off is it serious?
Need to put some W D 40 on that door hinge giving chevy a bad name big Ted.
Good little vid Ted ... Thx
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.
Its that fan thump noise I can make it stop doing that with a double pole contactor
Joe knows , I remember that video
That's interesting, maybe Ted will try that, I'd like to know if it works.
Yup, you should make a video on that
sure would love for you to show me, I always want to learn how to get a customer off my back lol. please make a video on your solution to prove your hypothesis.
I only install double pole contactors when they need replacing
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 😅
Yes, the noise may be normal, however, what is CAUSING the noise? Is it from 'fluid shock' when a valve shuts closed suddenly?
That was the fan motor, not the compressor.
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.
We had a Trane 5 ton installed in Jan 2021and ours makes a rattle/noise when it shuts off.
Never seen that too, should call to tech support to get some opinion about it.
Good job ted❤😂🎉
that's just a little normal rattle from the compressor shutting down
My next door neighbors newly installed Trane makes a loud clunk every time it shuts off. It doesn't seem normal to me.
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.
My Lennox unit purchased last year does this. A little more louder in fact. Would it impact the functionality or lifetime of the system ?
That's just the way a scroll compressor sounds. It's spring loaded from the sound of it.
problem is it didn't do it when it was new did it? Only because it's a Trane does he think its ok.
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.
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
Hate to see his electric bill having 2 units cooling that house.
2:16 Smaller unit switches off with clunk. 3:33 2nd unit makes no thump sound.
Some people amaze me
Do you ever have issues with the scroll coming apart in the compressor?
Holy moly put some WD-40 on your van door hinges 😂
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?
Trane does not use Chinese compressors. Some have LG compressors, and those are made in Korea. Most include an Alliance, and they are still made in Louisiana from what I have seen. Maybe yours was a certain batch.
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.
Sadly for customers the mfg keep trying to cut cost out and keep function. Notice how much lighter a same capacity, new compressor is vs one from 15yrs ago?
Have a American standard which almost a year old. It does the same thing also
Scroll compressor. That's what they do.
Normal sound for a rotary compressor. Their valves behave differently for a reciprocal compressor, and this is perfectly normal.
I for one do not believe it's normal, maybe with these two-stage compressors nowadays but it is definitely not normal on a basic compressor, I would like to find a way to drop down to first stage before shut down, I can tell the difference in sound from first to second stage, I have a f****** geothermal unit and as loud as f*** in the house... makes you want to run and go look and make sure you ain't got no lines blown off an flooding your house...lol
Backpeddling or back spin upon shut down mine does that too it's a scroll compressor kinda annoying but what're you gonna do....
Are the compressor mounts o.k. and not split. I use to see this on some refrigeration units. Thanks
Omg. Good luck with comment sir 👍
Hi Ted do you know or have talked to Curts the HVAC GUY?
I had one do that it was the rubber grommets on the anchor bolts
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
Sounds fine lol. They just don’t understand how their units work…
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?
😅😅😅😅😅 wow
Not very likely. They are torqued at the factory. Occasionally that may be the case, but not very likely. It is the sound that a scroll compressor makes when shutting down. The noise could actually be reduced by loosening the bolts just a little, but make sure to dab a bit of rtv across the bolt to prevent it from backing out more.
My 4 ton does that.
What are they talking about? That wasn’t that loud shutting down
My Trane XR makes the same noise. It is only a year old.
Play a video of a Goodman turning off and he will feel better
Trane has got be one of the best ACs out there.
My brand new ac unit makes same noise when it shuts off.
The Hvac G.O.A.T
My neighbors Trane makes the same noise.
She makes a lot of noise when satisfied ey
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.
Some customers are annoying 😂😂