Jump to content

2015 AC compressor runs all the time


dynoray

Recommended Posts

Posted

i have noticed lately that ac compressor is always running. even when i just have the heat going to the floor only and the ac button is not on. anybody noticed this? i realize that it will come on either defrost or when i press the ac button. seems weird.

Posted

I havent noticed it on my 2500 maybe drop in your service dept have a quick look, even if its just to ease your concern.My truck is so quiet inside you cant tell the AC is even running. :lol:

Posted

#PIT5293A: Normal Characteristic - Unwanted A/C Compressor Operation After Being Turn Off

 

Condition/Concern

Some owners may comment that after turning the A/C compressor off during the previous ignition cycle, it turns back on by itself on the next ignition cycle.

This concern can be duplicated in the following scenario:

  1. Begin with the engine running.
  2. Turn the A/C Off.
  3. Turn the HVAC blower off.
  4. Shut the ignition key off and allow the system to completely go to sleep, which may take several hours.
  5. Restart the engine.
  6. When the blower motor switch is turned on, the A/C compressor will be on.
Recommendation/Instructions

This is normal operation and no repair attempts should be made

 

 

Posted

thanks for that. this really doesnt do that. i tested it,and it comes on with the ac button off on the floor heat setting. stays on too. defog or defrost i can see,but not floor. going in for a silly heat shield bulletin,so ill see what they say.

Archived

This topic is now archived and is closed to further replies.

  • Latest Articles

  • Posts

    • You seem to be struggling with reading comprehension.   I HAVE SAID 3 TIMES THAT THE BOTTOM OF THE CROSSHATCH IS A QUART BELOW FULL.    I have also said that the manual will not call that "1 quart low" because it is not a quart below the acceptable range in answer to asilverblazer saying that he has never seen the bottom of the marking noted as "1 quart low" in a manual. The wording of the manual allowing for an acceptable range would indicate that .00001" above the add mark is ok. Also, because the manual allows a range, a quart below full and a quart below acceptable are two different volumes. Thus the manual will not use the phrasing "1 quart low"
    • GDI Injector tips are in the combustion chamber and yes, they are subject to the same aromatic hydrocarbon based carbon build up the entire chamber is subjected to. Chevron Techron is a PEA based cleaner (polyether amine)  that is VERY effective if the dose is high enough.  Carbon the tips disrupts the spray pattern so keeping them clean is kind of a big deal. It will clean more than the injector tips. It will keep the inside of the injector tip clean as well. When they shut off they 'hot soak' building varnish internally behind the pintle. The tip, unlike most MFI systems have several orifices of very small diameter. They have to stay clean to work right. That spray pattern is supposed to spray into the cup in the piston, not all over the cylinder walls. Old guys will understand...    Top Tier Chevron has enough of the cleaner to be effective if used regularly. Other solutions could be Shell V Power Nitro + Premium and Exxon/Mobil Supreme Plus Premium ONLY use a different chemistry to the same effect with the added bonus of a friction/antiwear additive as well. Red Line SI-1 is PEA based as well with an upper cylinder lube. There's a white paper on their site for shock treatment of system left untreated for long periods. AMSOIL PI has a full system cleaner of yet another chemistry that will strip carbon out of the power cylinder pretty quick. Gumout Regane is also PEA based but at very low doses and those that are isopropanol based will not be effective. Alcohol content is way to low. Chevron Techron in any pump gas, Use by package instructions. 10 oz per 15 gallons every 3,000 miles. First use may require two treatments.    So, Techron, Red Line SI-1 and AMSOIL PI if batch treating and Shell, XOM Premium or any Chevron Fuel will not just keep it clean, but will clean it if dirty. No other fuel "I'm aware of will do that".    Flex Fuel motors. If you use at least 40% alcohol on a regular basis they won't carbon at all. PEA is not recommended for fuels over E-20     (www.carparts.com)
    • It is always a good idea to exercise it at least every few months to make sure the actuators don’t get stuck. It is also a good idea to actually drive it for at least a few hundred feet when you do that so seals experience motion and oil movement.  Off pavement or snow/ice is best for this, but driving wet pavement in a straight line for a  short distance will work if you don’t have other options. I have  forgotten and gone as long as six months between exercising it on my 2021 and it has always shifted promptly.  I usually just use my straight 300 foot gravel driveway.  
    • Absolutely!  These forums are legion with posts of people complaining that their truck wouldn't go into 4WD when they needed it to.  Most of them hadn't used it ever or in years.   I try to run mine through the paces every month or so and drive it a few miles on a dirt trail near the house a couple times a year if not already off-roading.
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...