Why is my a / C light flashing on my GM car?

GM has issued a technical service bulletin #09-01-38-004: INFORMATION FOR VEHICLES WITH HVAC CONTROL MODULE A/C AND RECIRCULATION INDICATORS FLASHING. The bulletin applies to the following vehicles: The A/C light is designed to flash and disallow A/C operation if any of the following conditions are present:

Why does my a / C light blink 3 times?

The 3 blinks usually means something isn’t in the correct position for the A/C to operate- either the mode control is in the wrong position (a/c doesn’t work in defrost mode, etc.) or the compressor won’t turn on for some reason.

What to do if your a / C light won’t turn on?

There is another reset procedure other than the one Nathanjax mentioned- first start it up and set all hvac controls to off, then shut off the engine, disconnect the positive battery cable, wait 10 minutes, then before reconnecting it touch it to the negative battery post for a complete discharge of the system.

What causes an AC Light to flash and disallow operation?

The A/C light is designed to flash and disallow A/C operation if any of the following conditions are present: Ambient air temperature (AAT) is too cold (35 degrees or colder) Vehicle system voltage is less than 9.5 volts Refrigerant pressure is too low

Is the engine hot AC off warning light still on?

ENGINE HOT AC OFF WARNING LIGHT IS ON. BUT TEMP. GAUGE IS STILL ON COLD ENGINE HOT AC OFF WARNING LIGHT IS ON. BUT TEMP. GAUGE IS STILL ON COLD – Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website.

Is the a / C on my GM truck really hot?

From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. I have a 2008 1500 4×4 4.3 V6 with 40000miles. Recently the ENGINE HOT A/C TURNED OFF warning pops up, but the engine isnt really hot. It seems to reset itself after a while.

Is the engine hot a / C turned off code?

Recently the ENGINE HOT A/C TURNED OFF warning pops up, but the engine isnt really hot. It seems to reset itself after a while. I though it did it more in wet weather, but today is dry (though yesterday rained). It did this yesterday.

Why does the AC flash on and off in my Silverado Sierra?

If the truck thinks its below 40 degrees outside, your AC will not be allowed to come on to protect the compressor. Go figure!! The darn AC light will just flash on and off. I ran into this problem in the spring when the temps would drop below 40 degrees during the night, then shoot back up to the 70’s during daytime.

Where is the AC button on a Chevy Silverado?

My Chevy service tech advised me to press the recirculation button and the AC button (just below it) at the tame time to get the ambiant temp reading to instantly reset the computer to the current actual temp. This allowed us to have AC once again as long as the outside temp is above 40.

Are there warning lights on the dash of a Chevy Silverado?

No driver wants to see a warning light on the dash. However, adhering to your warning lights when they appear on the dash could extend the life of your Chevy Silverado. This article applies to the Chevrolet Silverado GMT800, GMT900, and K2XX (1999-Present).

What are the warning lights on a Chevrolet?

The following are warning lights and indicators found in vehicles built by Chevrolet. Click a link to learn more about each one. They are roughly ordered by importance, which tends to be by color (red, amber, yellow, orange, green, blue, gray). There are nearly 50 of them so search carefully!

Why is the AC light blinking 3 times?

The first +45F day of the Winter here I think. Bright sun too, so inside the car gets plenty warm. Tried the AUTO setting at 68F- ac is not on. Tried to turn on the ac manually – three blinks, and off. Tried turning the temp all the way down to 60F – ac is still not turning on, with the manual effort still resulting in 3 blinks and off.

Why does the AC Blink on my Chevy Duramax?

I know it usually blinks when it senses it’s cold outside, but I know it would turn on when it’s this warm out, my dads truck AC comes on no problem and mine just blinks. The tuner wouldn’t have anything to do with this right? I could of sworn it was on 3 weeks ago, and I have been tuned and deleted for a month and a half.

What to do when your AC Light stops working?

turn the key on, do not start the vehicle. Depress and release the gas pedal three times. the light should start to blink. Turn the key off and then start the vehicle. The light should go out. The instructions will also be in your owners manual. My ac in the front of my 2007 Tahoe just stopped blowing. It was working when I got out of it.

When does the coolant temperature warning light turn on?

The coolant temperature warning light turns on when your engine is sensed to be too hot and is at risk of damage from overheating. Is it safe to drive with the coolant temperature warning light on?

Why does the engine warning light go out?

On engine startup, the warning light will illuminate for a second or two to check the bulb and should then go out. If the warning light is illuminated even after startup, it indicates that the car’s computer has detected an issue within the system.

What does the flashing light on the air conditioner mean?

” (Air Conditioning): Press to turn the air conditioning system on or off. An indicator light comes on to show that it is on. The air conditioning can be selected in any mode as long as the fan is on and the outside temperature is above freezing. A flashing indicator light indicates that the air conditioning compressor is currently not available.”

Why does the AC Light go out on my Impala?

This is for our 2007 Impala with a 3.9L V6 with 118k miles. When pushing the AC button, the light flashes and then goes out. This happens with the fan set to any speed and the air out on any setting. I dicovered this while at work, so I don’t have access to my gauges.

Why does my AC light blink when I turn it on?

Not to sound dumb… but are you sure its the AC button you are pushing – I know the Recirc button will do that if the vent selector is set for anything but the Dash vents. Click to expand… Never had it on. Never use it.

When do I press the AC button it blinks three times?

If the vehicle is equipt with an ambient air temperature display, the sensor also prevents the AC clutch from engaging if the outside air is below as certain tempreture. To test, turn the AC on. Press and hold the AC button at the same time as you press and hold the recirculate button. Hold for 5 to 8 seconds.

Why is my 2003 air conditioner not working?

Owners of 2003’s may comment about poor A/C performance after they have pressed the A/C button and see what appears to be the snowflake illuminated on the display. What has actually happened, though, is that they have disabled the operation of the A/C compressor and the snowflake symbol, upon closer inspection, has a slash through it.

Why does my a / C blower not work?

A/C blower was working but was not blowing cold air. Fan control works fine. Passenger side mirror would not respond to remote control on driver door but the driver’s side mirror works normally. Radio does not come on.

Is it normal for a 99 GMC Sierra to flash the brake light?

I have a 99 gmc sierra 4wd 5.3l. The other day when i pulled into my driveway and put it in park i also set the e-brake. Is it normal for it to flash the brake light. It only does this when the e-brake is on when i park and when i go to drive away.

Why is the brake light on the dash flashing?

Last night all was normal then this morning the brake light on the dash started flashing and the beeping starts non stop over 3mph. Fluid level is fine. Fuses are fine on the side of the dash and under the hood. Even removing the fuses doesnt temp fix the issue. Any other suggestions? Fixed it.

Why does the AC flash on my GMC Acadia?

My GMC Acadia ac will flash three times and went off when I tried to turn the AC on. Well, I just put freon and it’s fine now. Bought a can from Walmart and did it myself. Make sure to have the one with the gauge to ensure proper charging.

What causes a flashing check engine light on a GMC Sierra?

While a majority of the time, the flashing check engine light is going to be caused by a misfire related to your Sierra’s ignition system or fuel system (as stated above), there are other issues that can cause it. Your timing chain could have jumped .

Why is my air conditioning not working on my GMC Sierra?

While there are a variety of reasons your GMC Sierra 1500 air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

Why is my GMC truck not getting cold?

Mine is doing the same shit yours was, had it in the shop a few days back and he said everything was normal as far as pressures and freon charge go. Mine is cool, but not as cold as it should be. If I set the knob to 65 on auto, the blower is still on high w/ the re-circulate on after I drive 25 min to work.

Where is the a / C relay on a GMC Sierra?

Can you see if you have voltage to two pins for the a/c relay, it is in the fuse box you just checked the fuses in. Make sure the engine is running and the a/c is on, on the control deck. I have power at two of the four pins in the relay, the fuse that does not have power is chmsl right under frt HVAC.

Why is the a / C not working on my GMC Sierra?

If it does not kick in let me know and we can go over he power and grounds and get the a/c to work again. It does not seem to be taking freon. I let it run the entire time and the low got to 107 and high 99 it drops to around 90 on low side when the fans come on. The fans are coming on for engine temp not A/C.

When does the AC turn on my Check Engine light comes on?

When the AC is turned on my Check engine light comes on ,… Q: When the AC is turned on my Check engine light comes on , code reading throttle position sensor, not enough voltage.

How does the AC Light Work on a GMC Acadia?

The AC light will flash 3x, then the temp gauge drops down to the lowest point. In addition, the check engine light is solid orange and the fan (engine fan, I think?) runs constantly. Yesterday, it hesitated to start and sputtered a few times. Today we have it being serviced at the dealer.

Why does my a / C light not come on?

From what I’ve been able to find out so far it may just be low on freon. Best thing to do is a full evac and recharge, it’s the only way to know that you have the right amount in your system. Also check for leaks. I think the blinking light is just telling you to check out your a/c system. You could always install one of these aftermarket air kits.

Why is the a / C blinking ON MY 1992 Chevy?

Some owners of 1991-1992 C/K vehicles may comment that the A/C letters in the middle of the control head face are flashing. The HVAC control system used on 1991 and 1992 C/K vehicles incorporates a low A/C charge warning system.

Why is the AC Light not working on my GMC Acadia?

Finally got the Car yesterday after 4 days in the Garage (AC and steering growling job). They have recovered all old gas and put a new one using the new advised pressure as per GMC’s bulletin. They also have re-programmed the computer box. As per the QA guy, Due to very hot climate here, GMC had released new bulletin to fix this issue.

Why is my AC not working in my car?

System (control head) is picking up electrical interference on the wire that comes from the “pressure cycling switch” (there is two of them) to the control head that makes it think compressor is cycling because of a low charge.

Why is my a / C light flashing on my GM car?