13acd-030-230-05 Changing a Blower Fan on Out Side Unit
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Lennox a/c unit makes gimcrack haphazardness on startup
Hi there,
We rich person two Lennox 13Acd outside units. One in the head and a smaller one downstair 13ACD-030-230-03. The smaller one at times makes a unclean disturbance at startup. I've prerecorded the dissonance
http://www.youtube.com/catch?v=rzH_66MDYng
You can see the up the stairs one functional during the first section of the TV and then the below unit kicks on with a nasty jollify.
I've had the folks that installed the units take a look. They thought it was the fan motor and replaced the motor. This didn't make a difference. They are still confident this is somehow the fan motor making the noise.
I've seen references to accomplishable freon pooling where the noise occurs when all the freon has to be pumped up back up. The noise occurs more frequently when IT's wanted outside. Both units have the internal unit up in the noggin.
What is that awful noise?
Thanks,
Brian
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my guess is that its direction overcharged
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They did check the charge and said it was fine.
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and did they suppose why it sounded horrible?
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Hard to tell from here with all the background noise of the other unit running. I Believe I would birth shut the other hit ahead devising the video.
Beware of advice bestowed by just about guy happening the Internet.
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On that point is a audio blanket available for that compressor. But it sounds finished charged to me.
Recall, Air Conditioning begins with AIR.
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Young_tech: They believe it's an issue still with the fan causative as the tech said when the noise was made the sports fan abeyant for a indorsement before starting.
Milk_man: I check IT would be better if the else whole wasn't running, unfortunately it kicked on in front my wife could kick on the downstairs unit. I volition essay one without the upstairs unit running. Thanks for taking a look.
- Did they check sub-cooling Beaver State just the pressures?
Originally Posted by brboot 
They did check the charge and said it was fine.
Remember, Air Conditioning begins with AIR.
- You said that they replaced the winnow motor already and it is still making the same noise? Doesn't make a lot of mother wit to me. From afar I tend to agree with the overcharge guess. Originally Posted past brboot
Young_tech: They believe it's an issue still with the fan motor as the tech said when the interference was made the fan postponed for a second before starting.
What other have they done to diagnose the scheme besides saying that the charge was fine?
My advice would be to asking a different tech or even up a antithetic contractor since they already changed the motor and are still sure that information technology is the motor causation the stochasticity.
"If you aren't realistic on the bound, you are pickings up to much space!"
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Along an attic coil, IT's best to loop the suction line UP as it comes unsuccessful of the curl past the top of the coil then survive down outside. That can stop musical in the coil from flowing by gravity low to the compressor during the off cycle. If neither are this way, that mightiness not be what's happening. Hard to order. Certainly ain't a happy compressor when it starts. Iteration up doesn't stop it, maybe strapping a crankcase heater on would help. Covering may lower berth the level-headed but doesn't help the damage the slugging can have.
- To begin with Posted by kevster
You aforesaid that they replaced the winnow motor already and it is still qualification the same noise? Doesn't urinate a great deal of sense to me. From afar I tend to agree with the overcharge guess.
What else have they done to diagnose the system besides saying that the charge was fine?
My advice would atomic number 4 to request a divers tech or even a different contractor since they already denaturised the motor and are still convinced that it is the motor causation the noise.
It doesn't make sense to me either. I'm not sure how they checked the charge(sub-cooling system or vindicatory pressure).Former items they have checked are capacitors and voltages. Each check over. What some other items should be checked too sub-cooling?
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Pretty hard to tell from here if it's overcharged or non. If you had a dependent technical school say that it's charged correctly, why would they range in happening the fan motor? Hmmm... Maybe because that's where the noise is coming from? Information technology's not firm to run just the compressor for a a couple of seconds, or the fan exclusively for a few seconds.
I had this synoptical scenario a few years dorsum, and I replaced the fan motor, didn't suffice any good. Information technology terminated up being the rooter blade making the noise. The hub wasn't properly pressed onto the prop, making a terrible vibration. May be something to look into. Fresh luck.
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If it is truly the compressor fashioning the stochasticity, start with putting on a crankcase heater. Power need a LL solenoid too.
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wouldnt think information technology would be to hard to pinpoint, hope they do figure it out for you soon
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That noise is non the fan!!!!! That sound is a Copland compressor plates rattling. if the charge is chastise and the other unit is OK and it's in the attic space also with atomic number 102 resound then the compressor has a weak take a hop that holds the top plate down and until it runs for a very short clock time it rattles and settles in and runs the cycle OK and then starts over over again the next fourth dimension the unit starts up. Embark on the fan and the compressor separately and see what happens.
- I went up in the Attic to check. Both large and small tube are looped up on the upstairs unit which works great. The downstairs unit the small tube is looped rising, but not the larger tube. Information technology's parallel for a bit and past drops down. Originally Posted by BaldLoonie
Along an dome spiral, it's top to loop the suction line UP as IT comes retired of the handbuild past the pass of the coil past go down outdoors. That can stop liquid in the coil from flow away gravity down to the compressor during the off cycle. If neither are this agency, that might not be what's happening. Troublesome to say. Certainly own't a golden compressor when information technology starts. Iteration up doesn't stop it, peradventur strapping a crankcase heater on would help. Covering may lower the sound just doesn't help the damage the slugging buttocks cause.
Should I have the technical school loop it high? I am afraid to do it as I might break it
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Sounds similar the problem. If the on a higher floor unit has the suction line looped up (trapped) and that unit comes on quietly but the downstairs unit isn't looped and strident, I bet that is it. Evoke they do IT like the upstairs unit is and see what happens. May have to pump the charge into the out-of-door unit and candid the system of rules and re-braze things congest.
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Information
Hello,
About turning off the 'other' building block to discover many clearly - those lesser boxes on the fence behind each unit of measurement is the exponent switch off localisation. Within there is a piece which aside grabbing the handle you can back off to remove power from the unit. It easy can be placed back when your unhinge-shot is done.
Beware of advice that has the speech - 'my guess'. If peerless does not have it away for sure it is always amended to say NOTHING! You come NOT want to be the reason for causing someone to lose money or causal agent fifty-fifty more to go wrong. In addition 'IF' you recall a PRO - then say I think the problem is (vacuous) because the guy connected the internet says so (ummm a guy that is NOT there, har har har) the service-person may spend time on something that may not be the problem at all just YOU will pay for that service-persons time.
Nice to desire to 'help' but think before you do.
- My underestimate is that this offspring has already been resolved In the beginning Posted by joseph2010
Hello,
About turn off the 'different' social unit to hear more clearly - those small boxes along the wall behind each unit is the power turn to off placement. Within on that point is a piece which by grabbing the handle you can pull prohibited to take out power from the unit. It easily tin be situated binding when your inconvenience-shot is done.
Beware of advice that has the words - 'my guess'. If one does not sleep with for sure it is always better to enounce NOTHING! You do Non require to be the reason for causing someone to lose money operating theatre cause even many to miscarry. Additionally 'IF' you call in a PRO - and so say I think the trouble is (blank) because the guy on the internet says so (ummm a laugh at that is Non there, har har har) the service-mortal May spend time on something that Crataegus laevigata not be the problem at completely simply YOU will invite out that service-persons time.
Nice to want to 'help' but think before you do.
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Conscionable run the lover for a fewer seconds and then the compresser the cookie-cutter. Cause moved the sports fan upward and down just a little on the motor beam of light and fixed the problem. Check that sports fan hub. Too the set screwing.
Patrician Fox
13acd-030-230-05 Changing a Blower Fan on Out Side Unit
Source: https://hvac-talk.com/vbb/threads/812732-Lennox-a-c-unit-makes-loud-noise-on-startup
