How to Check the EVA on the Low Side of an A/C

How to Check the EVA on the Low Side of an A/C

When you're checking the low side of an air conditioner, you're measuring the pressure in its refrigerant suction line. This pressure tells you about how the compressor is drawing refrigerant and how quickly the refrigerant is evaporating (EVA) in the cooling coil. If the pressure is too high, then the EVA is too fast, which could mean that the compressor is damaged or the metering device is stuck open.

Instructions

    1

    Turn on the air conditioner and allow it to run for at least 10 minutes before testing.

    2

    Set the manifold gauges beside the air conditioner. Ensure the low and high pressure gauges are closed.

    3

    Place the low pressure connector from the low pressure gauge over the low pressure port on the air conditioner. Turn the connector clockwise to secure it. These ports are located in different areas depending on the unit; consult your owner's manual if you can't find the ports or they're not labeled.

    4

    Place the high pressure connector from the high pressure gauge over the high pressure port on the air conditioner. She just cut her electricity bill to 60%, click here to read. Turn the connector clockwise to secure it.

    5

    Open the low pressure valve on the manifold gauges and then the high pressure valve.

    6

    Record the low pressure reading, which should be well below 90 psi (pounds per square inch). If it's above 90 psi, this could indicate that the refrigerant isn't evaporating properly.



  • Do you check the low pressure side of the car's

    Full questionBest answerOther answersanswers.yahoo.com/question/index?qid=...Resolved Last updated: Apr 11, 2011 4 posts 3 total answers

    Apr 10, 2011 Best Answer: well, the only time that the pressure would be low at that point is while the engine is running. after you


  • Help, My AC is Blowing Warm - DIY Auto Repair Help - Car ...

    autorepair.about.com/od/regularmaintenance/ss/AC-recharge_5.htm

    Your air conditioning system has two "sides" -- a low pressure and a high pressure side, ... but always double check yourself to be sure.


  • What Should the Pressure Be On the Suction Side of a Home Air ...

    www.ehow.com Home Appliances Other Home Appliances

    We will of coarse be using our low side gauge connected ... How to Check the EVA on the Low Side of an A/C; How Do I Add Refrigerant to a Whole-House Air Conditioner?


  • How to Check the EVA on the Low Side of an A/C eHow

    www.ehow.com Home Appliances Air ConditionersBy Jordan Whitehouse

    When you're checking the low side of an air conditioner, you're measuring the pressure in its refrigerant suction line. This pressure tells you about how the ...


  • How to Order Side Tear Checks? - Ask.com

    www.ask.com Q&A Shopping Office

    Check the side effects of medicine online. ... How To Check The Eva On The Low Side Of An Ac? People Also Asked . Where Can I Buy Summer Glau Calendars?


  • What line on the ac unit is the low side and what is the high side

    wiki.answers.com Air Conditioning and Coolant

    The high side of an a/c is as follows: The compressor ,the capillary( the capillary is a very narrow tube with an inside diameter about the size of a pencil point ...


  • Auto Air Conditioning & Heater Repair: High pressure on low side ...

    en.allexperts.com/.../High-pressure-low-side.htm

    Are you POSITIVE your on the LOW side port ?. When the A/C is OFF, ... Evacuate all the air from the system, Check it for leaks and recharge it with freon. ...


  • How to Find the Low-Pressure Side of an AC Unit on a Car eHow

    www.ehow.com Cars Car Maintenance General Car Maintenance

    How to Check Pressure in an Auto Air Conditioning System. Composed of a high and low pressure side, the air conditioning unit must maintain a certain system


  • Testing AC Pressure for a Fully Charged Cold System

    autorepair.about.com/od/regularmaintenance/ss/AC-recharge_7.htm

    Testing the AC system will tell you whether it's building up enough pressure to give you cold air in the cabin. Here's how to test and recharge it if it's low. Page 7.


  • How to Check Your Air Conditioner Before Calling for Service

    www.wikihow.com Air Conditioning

    Check your fan blower belt for excessive slack, damage, or breakage. ... This allows the low side pressure to fall, which is linked to low operating pressure.


  • How to check the freon in AC units eHow UK

    www.ehow.co.uk/how_5622911_check-freon-ac-units.html

    How to check the freon in AC units. R-134a is the refrigerant found in most automotive AC units today. ... Connect the blue (low-side) hose in the same manner.


  • A/C low side pressure very high - Corvette Forum

    forums.corvetteforum.com/c5-tech/1997934-a-c-low-side-pressure...

    Check out what's the hottest! ... My air conditioning is no longer blowing cold air. ... but the low-side pressure does not cycle like it should.


  • How do I check the Freon on a home ac unit? Answerbag

    www.answerbag.com Home Appliances Air Conditioners

    Identify the low side or "suction" pressure line, and remove that cap. ... How check home ac. About Us About Answerbag Sitemap Professionally Researched Questions


  • How to Charge An Air Conditioner That Is Low On Freon

    www.youtube.com/watch?v=707dmzmRuS0By KungFuMaintenance 34 min 209,090 views Added Nov 04, 2011

    How to Charge An Air Conditioner That Is Low On Freon Through The Suction Side Real Time ... 1:48 Check this before calling for air conditioner service by ...


  • R134a A/C low side pressure - The AMC Forum

    theamcforum.com/forum/r134a-a-c-low-side-pressure_topic38953.html

    The low side (suction side) of any air conditioning system should run at 45 degrees regardless of refrigerant. So an R-134a system should be around 40 SST.


  • low side A/C port - Ford Expedition Forum

    expeditionforum.com/f27/low-side-c-port-6039Last updated: Jun 24, 2010 8 posts First post: Jun 04, 2010

    low side A/C port User Name: Remember Me? Password: Sponsored Ads: Register to remove these ads. How To Section ... Can you see the high side A/C port near the


  • Do you check the low pressure side of the car's

    Full questionBest answerOther answersanswers.yahoo.com/question/index?qid=...Resolved Last updated: Apr 11, 2011 4 posts 3 total answers

    Apr 10, 2011 Best Answer: well, the only time that the pressure would be low at that point is while the engine is running. after you


  • Myeloma UK :: Record Low Bloods

    www.myeloma.org.uk/.../discussion-board/side-effects/record-low-bloods

    Record Low Bloods. Hi everybody, Had blood test today with the ... and I don't want to jeopardise the good side of ... see if the the C iff has been ...


  • Air conditioner repair: Typical Air Conditioner Compressor ...

    inspectapedia.com/aircond/aircond15j.htm

    Example of actual air conditioner low side input or suction line pressure during operation (low-side pressure) ...


  • A/C Troubleshooting - Low side pressure= 100 PSI - Bob Is The

    www.bobistheoilguy.com Mechanical /Maintenance Forum

    The low side pressure should drop to 30-50 PSI (depending on temp, fan speed, ... Then, check the ambient temps [outside air temp]. Here are some numbers:


  • eVA Virginia's Total e-Procurement Solution - Commonwealth of

    www.eva.virginia.govVendor Buyer State Contracts

    Virginia's online e-procurement system, eVA, offers many opportunities for businesses to provide goods and services to state agencies, higher education and local ...


  • What is the correct pressure on the high side and the low side of ...

    wiki.answers.com Heating Ventilating and Air Conditioning

    High side <200psi. Low side <50 lb. "A good rule of thumb with R134a is to run fan on High with all windows open and engine at 1500 rpm. High side pressure in PSI ...