Ac light blinks 3 times when blower is not on ac not working
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Junior Member
Joined: Mar 2022
Posts: 3
Ac light blinks 3 times when blower is not on ac not working
I just bought my first hummer and am so excited! I want to get all issues fixed as soon as possible. My ac doesn’t work but it is still fairly cold where I live, I just want to be ready for summer. I’ve read if the ac does the 3 lights blinking that means something is wrong. I took it to a shop and they replaced the climate control sensor I believe, but the three lights still blink only when I have the blower off. The shop told me they couldn’t add refrigerant because it is to cold out. Does the 3 blinking lights mean something is still wrong or is it just doing that because I don’t have the blower on? When the blower is on first it does not blink and stays on
Senior Member
Joined: Jul 2012
Posts: 8,971
From: C-Town
I just bought my first hummer and am so excited! I want to get all issues fixed as soon as possible. My ac doesn’t work but it is still fairly cold where I live, I just want to be ready for summer. I’ve read if the ac does the 3 lights blinking that means something is wrong. I took it to a shop and they replaced the climate control sensor I believe, but the three lights still blink only when I have the blower off. The shop told me they couldn’t add refrigerant because it is to cold out. Does the 3 blinking lights mean something is still wrong or is it just doing that because I don’t have the blower on? When the blower is on first it does not blink and stays on
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Junior Member
Joined: Mar 2022
Posts: 3
So I guess ur saying that’s what’s going on. This is my first post on here. I’m a girl so I try to learn everything when and where I can about my cars… is it true they can not put refrigerant in if it’s too cold? If so I’m guessing I won’t be able to fully know if it is fixed until it is warm out?
Senior Member
Joined: Sep 2008
Posts: 6,126
From: SE Michigan
I just bought my first hummer and am so excited! I want to get all issues fixed as soon as possible. My ac doesn’t work but it is still fairly cold where I live, I just want to be ready for summer. I’ve read if the ac does the 3 lights blinking that means something is wrong. I took it to a shop and they replaced the climate control sensor I believe, but the three lights still blink only when I have the blower off. The shop told me they couldn’t add refrigerant because it is to cold out. Does the 3 blinking lights mean something is still wrong or is it just doing that because I don’t have the blower on? When the blower is on first it does not blink and stays on
If your statement "I try to learn everything when and where I can about my cars…" was true you would have read the Owners Manual FIRST.
Super Moderator
Joined: Jul 2007
Posts: 13,083
From: Boat Town USA MI
Owner's Manual, who needs a stinking Manual, I don't need no stinking Manual................... just post up questions on the interweb forums and wait for answers, where we all know some answers are good, some are BS, and others are good BS. 
What ever in the hell happened to when you bring a new to you vehicle home, you pull the owner's manual out of the glove box and read it, all of it, BEFORE you go out driving it??????
What ever in the hell happened to when you bring a new to you vehicle home, you pull the owner's manual out of the glove box and read it, all of it, BEFORE you go out driving it??????
Senior Member
Joined: Feb 2021
Posts: 264
From: New Mexico
Seriously, what is wrong with world where people feel compelled to bash whenever someone asks an honest, but easy, question.
A forum like this exists to bring people together and help each other, not to attack and insult anyone who know less than you. For the bashers, if it makes you feel better about yourself to put other people down, you might want to look into therapy to help you with that.
To the OP, I apologize on behalf of everyone here who wasn’t able to give you a real answer before the condescending bashers took the thread down this path of negativity.
A forum like this exists to bring people together and help each other, not to attack and insult anyone who know less than you. For the bashers, if it makes you feel better about yourself to put other people down, you might want to look into therapy to help you with that.
To the OP, I apologize on behalf of everyone here who wasn’t able to give you a real answer before the condescending bashers took the thread down this path of negativity.
Last edited by NMH3; Mar 12, 2022 at 12:53 PM.
Senior Member
Joined: Jul 2012
Posts: 8,971
From: C-Town
Seriously, what is wrong with world where people feel compelled to bash whenever someone asks an honest, but easy, question.
A forum like this exists to bring people together and help each other, not to attack and insult anyone who know less than you. For the bashers, if it makes you feel better about yourself to put other people down, you might want to look into therapy to help you with that.
To the OP, I apologize on behalf of everyone here who wasn’t able to give you a real answer before the condescending bashers took the thread down this path of negativity.
A forum like this exists to bring people together and help each other, not to attack and insult anyone who know less than you. For the bashers, if it makes you feel better about yourself to put other people down, you might want to look into therapy to help you with that.
To the OP, I apologize on behalf of everyone here who wasn’t able to give you a real answer before the condescending bashers took the thread down this path of negativity.
Senior Member
Joined: Jul 2012
Posts: 8,971
From: C-Town
YES! Test/check vent temp/ac pressures in a heated garage! In order to properly charge automotive A/C system the ambient temperature should be above 65ºF. Anything below that does not allow the system to build up enough pressure for a proper reading on your pressure gauges.
Senior Member
Joined: May 2015
Posts: 210
From: Texas
You are so right!
Seriously, what is wrong with world where people feel compelled to bash whenever someone asks an honest, but easy, question.
A forum like this exists to bring people together and help each other, not to attack and insult anyone who know less than you. For the bashers, if it makes you feel better about yourself to put other people down, you might want to look into therapy to help you with that.
To the OP, I apologize on behalf of everyone here who wasn’t able to give you a real answer before the condescending bashers took the thread down this path of negativity.
A forum like this exists to bring people together and help each other, not to attack and insult anyone who know less than you. For the bashers, if it makes you feel better about yourself to put other people down, you might want to look into therapy to help you with that.
To the OP, I apologize on behalf of everyone here who wasn’t able to give you a real answer before the condescending bashers took the thread down this path of negativity.