HHR4JK

2007 2.4

when i step on it, like getting on the on ramp to the interstate.
the ac blows warm, then eventually returns to cold.

normal or something wrong

Greybeard999

I think it will scale back on the AC when power is needed for just such a situation..... Haven't experienced it as I normally don't run the AC, or when I do I turn it off manually when I need power.... old habit.

Laco

Definately not normal. Mine stays cold regardless of my demand for power, which is as it should be.

Greybeard999

Shows you how much I use AC....

Brwbier

Don.t listen to laco. Your a/c has a wide open throttle cut off, all cars do. It lets you use all the power for the car when your foot is in it. Its been that way for more years than most people here have been driving.
Brwbier

HHR4JK

then this could also why my ss monte does it too...... hmmmm

guess i will just have to say "welp i am not going to whip your butt, because i want to stay cool" ....

Laco

Say what you want, but as I said, there is no noticable change in the AC oulet temp regardless of throttle demand, at least on mine. Same is true on my other two cars also.

Also the attached site says, SOME manufactures use a cutoff for WOT, not all. I don't frankly know if the HHR does or does not.

http://youracauthority.com/acterms/A...t-Switch.shtml

ChevyMgr

Opinions can be stated without name calling. Please stay on topic and no flaming.

ChevyMgr

2 of the many conditions that will cause the ECM to command the a/c compressor clutch off are 1) throttle position is 100% or engine RPMs are above 4760. Now it depends on how long you stay in one of those two conditions as to whether you will feel warm air.

Greybeard999

It shouldn't blow hot air immediately, I know if I'm running the AC and shut it off while leaving the fan on, it will still blow cold air for several minutes...... I know that's not an auto shut off because of WOT, but the same should happen, I would think.