Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

2002 chevy astro van. just replaced the AC compressor. went…

2002 chevy astro van...

2002 chevy astro van. just replaced the AC compressor. went to charge it and the comp kicks in but no cold air and there is no pressure diff between the high and low side on the AC lines. Check Valve gone bad?

Mechanic's Assistant: Do the vents feel cold? Is there a coolant leak?

System holds the coolant but no cold air.

Mechanic's Assistant: Are you fixing your Astro yourself? What have you tried so far?

Yes I'm doing the repair. like i said just replaced the AC Compressor

Show More
Show Less
Ask Your Own Chevy Question
Answered in 22 minutes by:
9/22/2017
Ricardo Hohl
Ricardo Hohl, Master Certified Tech
Category: Chevy
Satisfied Customers: 4,343
Experience: Automotive instructor at Porter and Chester institute
Verified

Good Morning and welcome to just answers my name is Ricardo. can you tell me the pressures on the low and hi side, how many ounces of Freon did you charge it to.

Ask Your Own Chevy Question
Customer reply replied 10 months ago
pressure is the same at both sides, I have no number. One large can almost, 20 oz's maybe.

OK if the pressure is the same on both then the problem is the compressor not pressurizing the Hi side ( liquid side) to turn it in to gas on the low side

Ask Your Own Chevy Question
Customer reply replied 10 months ago
Brand new Compressor,
Customer reply replied 10 months ago
just installed.

the compressor is there to compress Freon gas in to liquid therefore the liquid side should be hi 150 to 200 and the low side should be 20 to 30 pounds on gas

Ask Your Own Chevy Question

if you have equal pressure then your compressor is not compressing or not turning the clutch on?

Ask Your Own Chevy Question

is the clutch engaging?

Ask Your Own Chevy Question
Customer reply replied 10 months ago
clutch is engaging

then the compressor is not good

Ask Your Own Chevy Question
Customer reply replied 10 months ago
why is the pressure the same on both sides?Check Valve in the compressor is faulty?

did you put the Freon with the can upside up or down?

Ask Your Own Chevy Question
Customer reply replied 10 months ago
upside down, not first rodeo.

did you put it on the low side?

Ask Your Own Chevy Question
Customer reply replied 10 months ago
fitting only fits the proper side to fill on.

upside down goes in as liquid...upside up goes in as gas low side should have been upside up.

Ask Your Own Chevy Question

putting the can upside down forces the compressor to compress liquid when it can only compress gas

Ask Your Own Chevy Question

yes the valve probably when bad.

Ask Your Own Chevy Question
Customer reply replied 10 months ago
ok, system was totally empty(hi side and low side) after installing the new compressor, tell me proper way to recharge system then?

when installing a new compressor make sure you put PAG oil at least one once, and if charging through the low side (gas side) put the can upside up this will take a little longer but will not damage the compressor.

Ask Your Own Chevy Question

as you put the new can the low pressure switch will sense gas low and force the compressor to turn on this will suck the rest on the can.

Ask Your Own Chevy Question

one best way to get an effective system cold is by pulling a 15 minute vacuum to the system before adding Freon . this will remove excess water and contaminants and will make good room for the new Freon to work effectively.

Ask Your Own Chevy Question
Customer reply replied 10 months ago
ok, good stuff here. I'll look into it.

Napa auto parts will rent you a vacuum pump for this job.

Ask Your Own Chevy Question

very good let me know if you need more information and help thank you.

Ricardo Hohl
Ricardo Hohl, Master Certified Tech
Category: Chevy
Satisfied Customers: 4,343
Experience: Automotive instructor at Porter and Chester institute
Verified
Ricardo Hohl and 87 other Chevy Specialists are ready to help you
Ask your own question now
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Ricardo Hohl Your Own Question
Ricardo Hohl
Ricardo Hohl
Ricardo Hohl, Master Certified Tech
Category: Chevy
Satisfied Customers: 4,343
4,343 Satisfied Customers
Experience: Automotive instructor at Porter and Chester institute

Ricardo Hohl is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,659 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,621 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,948 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,822 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
Car A/C low pressure @120, yes its good, 2003 chevy
charged. reads 120 low side. some freon released: no change. … read more
roy
roy
Associate Degree
3 satisfied customers
2005 impala. Ac pressures are even on high and low side.
2005 impala. Ac pressures are even on high and low side. Compressor runs constantly but the fans do not kick on. I replaced the expansion valve. No help. Need some help in diagnosis. I have a backgrou… read more
roy
roy
Associate Degree
3 satisfied customers
2002 astro van, front ac blows cold, rear blows warm, trying
2002 astro van , front ac blows cold, rear blows warm, trying to locate and check orifice tube but can't find it … read more
Mechanic01
Mechanic01
3,205 satisfied customers
Chevrolet: , I have 00 chevy astro van and coolant is leaking.
Hi, I have 00 chevy astro van and coolant is leaking. it is hard to see there , behind power steering pump. i replaced water pump and thermostat but its still leaking and blowing cold air from heater?… read more
roy
roy
Associate Degree
3 satisfied customers
1991 chevy silverado 5.7 v8 ac blows hot it's charged fully
1991 chevy silverado 5.7 v8 ac blows hot it's charged fully and compressor kicks on and it still blows out heat. Could it be a control valve if so where is it located? and could I bypass this just to … read more
roy
roy
Associate Degree
3 satisfied customers
Chevrolet Cobalt Sport: i have a 2008 chevy cobalt the ac compressor
i have a 2008 chevy cobalt the ac compressor went out ,i replaced it ,the expansion valve the condensor with built on drier,vacumed it down for 45min,the high side climbs up to 400 and above and the c… read more
Dan
Dan
High School or GED
1,401 satisfied customers
2005 Chevy Suburban: A/C on, that there wasnt any cool air blowing
I have a 2005 Chevy Suburban with rear A/C. Recently my husband noticed that when he put the A/C on, that there wasn't any cool air blowing. So today I went to recharge it. Before doing the recharge I… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
2004 Chevy: 6.6L duramax..ac was cooling at @42 degs.
2004 Chevy HD 2500, 6.6L Duramax. AC was cooling at @42 degs. but stopped cooling all together while driving. Compressor is engaged but no pressure lines will get even cool… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
A/c compressor it started working and stopped now its kicking
replaced a/c compressor it started working and stopped now its kicking in an out not staying on.… read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
2002 chevy blazer: operation and specs..2wd 4.3l truck..forums..psi
I need help with the operation and specs for the AC system on my 2002 chevy blazer 2wd 4.3l truck. Please only answer if your profile lists you as ASI and GM certified on ac systems and are 100% sure … read more
ASEMaster35yrs
ASEMaster35yrs
Vocational, Technical or Trade Scho
1,314 satisfied customers
2002 yukon: compressor..ac...The mechanic says it..expansion valve
Just had my compressor replaced on my 2002 yukon with rear ac. The rear was working before the compressor replacement. After the replacement it is not working- The mechanic says it needs a new expansi… read more
John
John
Master A.S.E Automotive technician
2 YEARS COLLEGE
4,071 satisfied customers
98 astro: blow cold..new compressor and accumulator and orifice..leak
i have a 98 astro and the rear ac doesnt blow cold.i just installed a new compressor and accumulator and orifice due to a leak. does the dual ac astro vans have two orifice tubes?… read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 satisfied customers
2002 Chevy: Freon..The compressor kicks..blow cold
I have a 2002 Chevy S-10. I had the vehicle filled with Freon today, they put in 1.75lbs. The compressor kicks on and off just fine, but the air does not blow cold. According to the place I got it fil… read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
S10: When I hook my hose to reharge the ac..v..hooked up correctly.
When I hook my hose to reharge the ac on my S10, 4.3L v-6, nothing happens. They are all hooked up correctly. Blue to the low side, red to the high side, and yellow to the can of refridgerant. . .… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
2002 Chevy blazer: ac compressor..blowing cold..low side..reaches
2002 Chevy blazer- AC compressor was making a horrible noise when the AC was turned on and not blowing cold. We replaced the compressor, added the oil, and R134a refridgerant. The compressor kicks on … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
1999 chevy astro: blowing..highway speed(50+mph), but will turn
the rear a/c to my 1999 chevy astro van is working fine.But the front is just blowing fresh air. At times the front will cut off completely when driving at highway speed(50+mph), but will turn back on… read more
GM Master Tech 01
GM Master Tech 01
GM certified diesel master tech
226 satisfied customers
1994 chevy astro: AC..a code 43 Knock Sensor (KS) Circuit..goes away
1994 chevy astro 4.3 only when I run my AC I get a code 43 Knock Sensor (KS) Circuit only at idle when I drive it eventually goes away. I replaced the ac comp. thinking that was it; but am still getti… read more
Chevy man
Chevy man
Mastertech
Vocational, Technical or Trade Scho
2,650 satisfied customers
2003 Chevy Astro: compressor come..engine compartment..Rear ac..cool
I have a 2003 Chevy Astro Van. The Front AC does not blow any air out but when you switch it on you can hear the compressor come on in the engine compartment. The Rear AC does blow out air but it is n… read more
RIP
RIP
Lead Technician/ JA Car Category Mentor
High School or GED
452 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x