Question about Heating & Cooling

1 Answer

My Lennox HS22 series split system scroll compressor overheats

My Lennox HS22 series split system scroll compressor gets loud and goes off on internal overload.The condenser fan stays running and seems to be turning at the correct speed.My coil is clean and my filters are new.It will run fine for a while but then overheat. the unit is 19 years old.it is a scroll compressor.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Contributor
  • 45 Answers

There couild be a small blockage in the refrigerant piping. This obstruction could be cyling through the system and causing the pressures to increase and decrease which is overheating the compressor. Normally when the compressor is overheating there is not enough refrigerant getting returned to the compressore to keep it cool while running. When it shuts down the the refrigerant equalizes which can return the blockage back to the coil or just simply dislodge it frome where it is hung up. When the compressor returns to its running temp, it turns back on and can cycle that blockage through the refrigerant piping which sometimes it may go thru and sometimes gets hung up and clog the system again. I would have a certified technician come over and hook their manifold to the system which can easily tell them if there is a blockage or he can trace the problem. Do you know what type of metering device is in the coil inside?

Posted on Jun 06, 2010

Testimonial: "Thanks Terry I did refrigeration for over ten years but got out of it 15 years ago...It took a while for my brain cells to click.I didn't think about the blockage which still may be a possibility. My pressures were a little low for my ambient temp so I added some freon now I have a good sweat back to the compressor and it has been working good for the last 3 hrs...the temps outside are supposed to hit the hi 90's and I will keep an eye on my head pressure.it is a split system and I'm getting some sweating at my txv..that is were the restriction usually happens.I used to get a lot of cap tube restrictions in small systems.thanks for the help."

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Lennox 10hpb


change run capacitor on fan. or bad fan motor

Jul 06, 2014 | GE Zoneline AZ38H12DAD Split System Air...

1 Answer

Lennox elite heat pump throws cold air


The unit should give you an error code if something is wrong.

Here's the manual:
http://instalacionesindustriales.com.gt/pdf/Lennox_Minisplit_HE.pdf

Mar 25, 2014 | Lennox 7 Series MS7-HO-18P MS7-HI-18P Heat...

1 Answer

Lennox codes


e5: open or short circut of outdoor yemp. sensor or outdoor unit.

see more Air Conditioning Fault Codes

May 11, 2013 | Lennox 7 Series MS7-HO-09P MS7-HI-09P Heat...

1 Answer

1990 Dolphin Motorhome Dometic AC problem


If your fan motor is slowing or stopping mid cycle it will cause the compressor to over pressurize. Many compressors have aan internal mechanism that will kick in with a loud whooshing noise, then the Thermal protector shuts the compressor off, cools then restarts. If this sounds familiar, you will need to replace your fan motor before you burn up your compressor...which to be honest may already be irreparbly damaged(sorry). Hoping 4 the best.

Jul 11, 2009 | GE Quiet-Aire Ductless Split System Air...

1 Answer

Two lennox heatpump 71/2 tons


check the true psi with the line psi to see if same if psi is good in cooling 225 hi and 70 low on 80'day then compressor is fine and i would start checking for temp difference on the reversing valve sometimes this will cause high suction or high discharge psi shift it manually with by energising it be cooling or heating then pull wire and see how it shifts if shifts good then txv on out door unit could be bad what is the psi in heating on the discharge line going to the indoor unit? most prv's are set at about 350 psi r22 as for suction line size its only hot gas in hp mode os no problem their shows in cooling mode as low suction psi ..hope this helps some also make sure indoor coil is clean!....thanks & rate me

Apr 19, 2009 | Ruud UBHC Air Conditioner

1 Answer

Loud noise


It is probably a rotary compressor unit.
They tend to make a start up noise.
Some technicians advocate adding a booster starting device to help the compressor start more quickly, thereby reducing startup noise.

Mar 12, 2009 | Heating & Cooling

1 Answer

New 14 seer split ruud heat pump makes very loud knocking noise


Well you may want to have a tech come out and check the freon level, but mostly when going into defrost, some units make alot of noise, the freon is reversed in the unit by way of the reversing valve, it makes a whooshing sound like freon is draining off, as far as the knocking noise, could be as I said in the beginning, might be low on freon, but it could be that, this particular unit does this, I have had units make some really strange noises in the past but functioned perfectly, hope this helped, please let us know, thanks again,
mr.grzz

Jan 24, 2009 | Ruud UAMB Air Conditioner

1 Answer

Lennox heat pump shuts down every 2/3 days


Hi , you may use amphere meter to detect whats goin on to the compressor and component.
Clamp one compressor wire if register exceed the laber amphere of motor motor are stuck or burn/
If not register the clamp meter check the thermal control might burn or lost contact.

Jan 04, 2008 | LG LSC121PMA Split System Air Conditioner

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

317 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2458 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...