Question about Heating & Cooling

1 Answer

Central air conditioner has 120+ psi 0n the low side and 178 psi on the high side. it only has 1 c,apacitor. the compressor won't start, what would cause this?

Posted by on

  • Jeff Landis Jun 09, 2010

    Thank you, however it took so long to get the answer that it didn't do me much good. I found the problem a while ago. It was overloaded and there were among other things leaks.

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,468 Answers

If the outdoor condenser fan runs,then its a bad overload relay on the compressor,if the fan doesnt run then its probably a contactor on the outside unit or your missing 24volts a.c. that controls the contactor on the outside unit

Posted on Jun 07, 2010

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:

2 Answers

When i turn on the a/c,the compressor does not work


CHECK REFRIGERANT CHARGE. USING A MANIFOLD GAUGE SET. HOOK MANIFOLD GAUGE SET TO LOW PRESSURE PORT AND HIGH PRESSURE SIDE PORT. LOW SIDE PRESSURE SIDE SHOULD HAVE 25 - 36 PSI AND HIGH PRESSURE SIDE SHOULD BE 178 - 237 PSI. IF LOW SIDE PRESSURE SIDE READ BELOW 20 PSI THE LOW PRESSURE SWITCH WILL NOT TURN ON THE AC COMPRESSOR CLUTCH NEED TO ADD LITTLE MORE REFRIGERANT. IF REFRIGERANT LEVEL CORRECT CHECK AC COMPRESSOR FUSE AND RELAY.IF POWER GOING TO AC COMPRESSOR CLUTCH YOUR COMPRESSOR CLUTCH HAS OPEN WINDING. AC COMPRESSOR CLUTCH NEED REPLACING.

Aug 11, 2011 | 1997 Nissan Pathfinder

1 Answer

What does it mean when the High side gauge is below 100 psi on my central air


It could be several things.I would start by making sure that the compressor is working.Check high and low pressure while unit is running. If they both read the same then your compressor is not working.The first thing I would do is to add refrigerant to see if it is just shutting down due to low pressure.Depending on how old your unit is and what type of gas you are using you should see pressures on the high side from 250-350 and low side between 55-85.Hope this helps you. Thanks.

Jul 21, 2011 | Heating & Cooling

1 Answer

The compressor is working but it is not blowing cold air. air turn off once in a while. need to turn off motor and restart truck so the air conditioner can restart


YOU MORE LIKELY NEED MORE REFRIGERANT IN SYSTEM SOUND LOW FIRST HOOK A MANIFOLD GAUGE SET CHECK AC LOW PRESSURE SIDE AND HIGH PRESSURE SIDE.LOW PRESSURE SIDE SHOULD BE 34 PSI AND HIGH SIDE SHOULD BE 228 PSI.

Jun 03, 2011 | 2003 Chevrolet Silverado 2500HD

2 Answers

What should the pressures on the low and high side of the air conditioner read ?


low side should be about 30 psi at idle speed, high side 120 to 180 psi depending on ambient temp. higher temp, = higher pressure, as you increase engine rpm to say 1000 low side should drop to 10 to 15 psi & high side should increase about 30 psi. If high side goes over 280- 300psi you have contamination (air) in system or over charged with refrigerant. you will need to recover freon, evacuate & recharge system with proper amount of refrigerant. If the low side drops below 0psi or into vacuum then the refrigerant level is low, you will have to check for leaks , repair leaks & refill refrigerant.
Hope this helps
Paul T

Jun 01, 2011 | 1997 Chevrolet Suburban

1 Answer

5 ton split LG UNIT brand new about 1 year old.


Look up the term BLACK DEATH.


90-100 psi is very high on the low side.

Without spending too much time,I would pull a vacuum to -28 inch of mercury and let it sit over night.

Monitor the manifold garage for leak. (rise of inch of mercury)

My bet is the low quality LG compressor's worn out metal part is in the condenser.

Blockage will increase the low side PSI.

You can buy HVAC blow out can/chemical to clean line before you vac and fill the refrigerant.

Please let me know what's you founding is on reply.



Jul 11, 2010 | Whirlwind FH-778 Air Conditioner

1 Answer

Low side psi 150 high side 165 on a watersource


Sounds like a weak suction valve on compressor.How old & what refergrant?

Mar 16, 2010 | Comfort-Aire RAD-81 Air Conditioner

2 Answers

What is a/c pressure on a 1999 kenworth when fully charged with a c 15 cat 550 hp tx KIETH.


low side psi will run about 30 psi, hi side pressure will go as high as 350 psi then the pressure switch will kick the engine fan on then drop psi down to 120-150 psi

Jan 15, 2010 | Q-Logic QLE4060C-CK Network Adapter

1 Answer

Hi everybody i want some help , iam a technision in air conditions ,i was fix a central ac carrier and i found that everything works good the compressor and the high pressure fan and indoor fan ,but the...


if the compressor is running - the suction pressure should be 65-75 psi - if it is very low - not enough freon - if it is very high - the compressor valves could be damaged - both will cause this

Sep 19, 2009 | Heating & Cooling

1 Answer

I am replacing my central A C. with a new one. I worked on Autos for 50 yrs. have guages. Do I Screw the Allen Plug in on the high side, run the compressor, then screw in the low side. to keep the r-22 in...


By George, you've got it.Front seat (screw in) the high side and run the unit. Do not let it pull into a vacuum as this will allow air to be sucked into the system when you open it. Also, watch you high side gage. Don't go over 400 psi. This is usually the High pressure cut out setting on most safeties. Pull low side to about 2-3 psi and kill unit. Let sit for about 5 minutes and then run it again back down to 2-3 psi. Front seat the low side any you should be good to go.
I strongly suggest that you add a filter/dryer to the system. It's good practice to do so once the system has been open. If you are going back with a 410-a system, don't leave it open to the atmosphere for more than 15 minutes. That is, the condensing unit. The only way to remove moisture from the oil on this system is to use filter/dryers. You can not vacuum it out like in the old days with R-12.

Good luck and hope this is what you are looking for.

Jun 27, 2009 | Whirlwind FH-778 Air Conditioner

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

Related Topics:

178 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2464 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...