Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

2007 chevy Silverado ac is blowing hot air on both sides. It…

Customer Question
2007 chevy Silverado ac...

2007 chevy Silverado ac is blowing hot air on both sides. It does this at random, put sometime when I hit a dump?

Mechanic's Assistant: Have you checked the coolant level? Have you checked the hoses for leaks?

Yes

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

Now Iam had it in the shop changes some acuaters,put that has't stoped the problem.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Not that i now at this time

Submitted: 8 months ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 7 minutes by:
11/19/2017
Chevy Mechanic: Pete, Auto Service Technician replied 8 months ago
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 32,941
Experience: 14 years GM dealer Technician.
Verified

Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.

Do you have an AUTO temp control system with temp settings for controls or manual controls?

Let me know,thanks Pete

Ask Your Own Chevy Question
Customer reply replied 8 months ago
Manual
Customer reply replied 8 months ago
No
Chevy Mechanic: Pete, Auto Service Technician replied 8 months ago

I apologize for the delay.

There were issues with wiring connections at the right hand side of the dash for this issue here.The connections cause what you have described here.GM had released a bulletin on this issue.Bulletin No.: 07-01-38-009B.

DO NOT REPLACE THE CONTROL HEAD.

Use the following information to diagnose this condition:

The concern must be current before diagnosis can be performed.

Review and print the following SI documents - Electrical Center Identification Views, for use during diagnosis:

- Junction Block - Right I/P, Top View

- Junction Block - Right I/P X4

- Junction Block - Right I/P X5

Locate the Junction Block - Right Side IP on the vehicle.

For the appropriate actuator, measure the following signals for voltage/resistance from the BACK of the X4 or X5 connector and record the following:

DO NOT unplug the X4/X5 connector.

Turn Ignition On, A/C Blower Full, if possible - mode on "panel" and Temp to "cold."

Once the fault is removed, the actuator will stay in default position until commanded to a new position. Change commanded position regularly to see if the issue is still current.

Continue to monitor door positions (feedback) on Tech2 to see if it changes during circuit testing.

- Ignition Voltage - 12V

- Door Control Signal - 2.5V when stationary, OV when commanded toward "cold" or "panel", 5V when commanded toward "hot" or "defrost"

- Low Reference - less than 40 ohm with ignition on. Less than 10 ohm with ignition off

- Door Position Signal - measure voltage

- 5 Volt Reference - 5V

If any signals do not display the correct value or if the issue is corrected during testing, pull the connector and check the terminal for poor tension (use the appropriate terminal tool). Replace or repair the terminal if poor tension is found.

If all signals are correct at RH BEC, reconfirm the customer's comments.

If the condition is not present, no further repairs are necessary. If the condition is still present, recheck the actuator connector 5 volt reference circuit, pin drag test and repair connector/pin as necessary.

Some customers may comment that the A/C blows hot air or is inoperative. They may also comment that they are unable to change the temperature or HVAC mode of the vehicle. Under these conditions, the actuator has moved to a default position. Refer to the table.

If you pull the trim panel off the side of the dash on the passenger side edge of the dash you should see these connections,make sure they are all seated properly and that the wiring isnt pulled tight and correct as needed.If this is all found to be o.k. let me know.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service,your 5 star rating is appreciated ( should be a link to click on here or above).You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

Ask Your Own Chevy Question
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 Pete Your Own Question
Pete
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 32,941
32,941 Satisfied Customers
Experience: 14 years GM dealer Technician.

Pete 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
I would like to try and diagnose an issue with my trucks AC.
I would like to try and diagnose an issue with my trucks AC … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,621 satisfied customers
Did everything to get my ac going but still blows hot air.
Did everything to get my ac going but still blows hot air … read more
Pete
Pete
Auto Service Technician
32,941 satisfied customers
Chevrolet Tahoe LTZ: Gary, my wifes 2009 chevy tahoe has dual
Gary, my wife's 2009 chevy tahoe has dual automatic temp control. She says that sometimes it just blows hot air on the driver side. Did a little research and changed out the blend acuator just above t… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,621 satisfied customers
Chevrolet Suburban 1500 LT: After an hour or two down the road
After an hour or two down the road the AC will swing from blowing hot air to cold air. The frequency from hot to cold is that it blows hot about 1-2 minutes then cold for 5-10 minutes. This happens se… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
2004 CHEVY: V8..LEFT SIDE BLOWS NOTHING BUT HOT AIR WHILE RIGHT SIDE
2004 CHEVY SILVERADO 5.3L V8 HAD INTERMITTENT(PAST MONTH) HOT AIR BLOWING OUT LEFT SIDE RIGHT COLD AC. IT WOULD RETURN TO NORMAL AFTER TURNING OFF CAR. NOW LEFT SIDE BLOWS NOTHING BUT HOT AIR WHILE RI… read more
Bill
Bill
Foreman/Team Leader
Vocational, Technical or Trade Scho
593 satisfied customers
2007 Crew-Cab Silverado, with ac on, the Passenger side..blowing cold
2007 Crew-Cab Silverado, with AC on, the Passenger side sometimes blow extremly hot. After constant temp adjustments & turn the passenger side on & off it will start blowing cold. Turn truck off & get… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
Silverado 1500 LTZ: dead battery..ac is just blowing hot air..way down
Hi, I had a dead battery on my Silverado 1500 LTZ today. After I charged the battery it started OK but now the AC is just blowing hot air. Even if I turn it all the way down… read more
JHoop
JHoop
Owner,Technician
High School or GED
97 chevy: the ac started blowing warm air..gauges..leaks..relays
i have a 97 chevy silverado... the ac started blowing warm air about a month ago. i checked the gauges and it showed i was full on freon.. so i did a pull down on the system thinking it has some moist… read more
Dave Nova
Dave Nova
Chevrolet Technician
Associate Degree
7,092 satisfied customers
2007 chevy: air conditioner..horn fuse under the hood in the fuse box
have a 2007 chevy silverado extended cab truck with 5.3 the air conditioner with blow cold then it will blow hot then later on it will blow cold last year i took the horn fuse under the hood in the fu… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
Blend door actuator..my 2000 Silverado without removing the whole dash
Can I get at the blend door actuator in my 2000 Silverado without removing the whole dash?… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
Chevy Truck: Silverado..the passenger side blows heat..Adjusted
2004 Silverado Chevy Truck: I have the dual automatic climate control system in the vehicle. Just recently (today) driving to work and attempting to use the air conditioning system and the passenger s… read more
Randall
Randall
Auto Technician / Consultant
Vocational, Technical or Trade Scho
69 satisfied customers
silverado 1500: 4x4 vortex engine..very hot air..out cold air..cool
have a 05 silverado 1500,,4x4 vortex engine...sometime the ac will blow out very hot air on one side, cold on the other side....does not do it all the time...it can be blowing out cold air then all of… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
Chevy: Pickup..blow hot..the other when I have it on Air Conditioner
Why does my Chevy Silverado Pickup blow hot on one side and cold on the other when I have it on Air Conditioner?… read more
frank
frank
Vocational, Technical or Trade Scho
1,892 satisfied customers
A 2001 silverado 4.8 v8. the AC..blow..engine compartment..connector
i have a 2001 silverado 4.8 v8. the AC and the heat both blow at the same time. in the engine compartment, where the control wires come out by the ac canister, one connects to the cannister, the other… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
Venture: air conditioner..a leak or compressor shot..van
seem my air conditioner blows hot air have had system charged is there a leak or compressor shot and maybe the cost of such a repair 2001 warner bros venture van… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
Chevy: warm air..blowing..on defrost on the windshield what
I have a chevy barretta just change the thermastate and now iam only getting warm air the temp. went 3/4 of the way to hot and still got warm air. my heater is not blowing out on defrost on the windsh… read more
Pragueress
Pragueress
Bachelor's Degree
286 satisfied customers
2004 Chevy: fan motor..blow..out hot air only onthe drivers side
I have a 2004 Chevy Silverado 4.8 on my fan motor it will only work on selections 1,2 and 3. 4and 5 will not work and also in the summertime when the air is on it will blow out hot air only onthe driv… read more
Scott K
Scott K
Automotive Instructor
Vocational, Technical or Trade Scho
1,330 satisfied customers
controls..drivers side starts blowing out hot air..passenger side
I have a 2003 silverado with manual dual zone controls. Sometime while having the a/c on the drivers side starts blowing out hot air, usually when the truck is shut off and started again the problem g… read more
toolpusher08
toolpusher08
High School or GED
84 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