Engine Temp Goes Up when AC is on Auto
#1
Engine Temp Goes Up when AC is on Auto
Engine Temp Goes Up (75%) when AC is on Auto but if its on circulation mode it goes back to normal no matter what the temperature settings. I had already the parts to replaced the radiator cap, engine temp sensor (2) and thermostat this coming Saturday. Anyone has experienced this?
#2
Senior Moderator
![what](https://acurazine.com/forums/images/smilies/what.gif)
I had a temperature issue on my 2G Legend that was much worse with A/C, and it turned out to be the thermostat getting stuck. That may not apply though.
#4
Intermediate
Have worked on MANY vehicle brands as a mechanic throughout my life .... but have very little shop time on Honda/Acura ... except Honda motorcycles.
With that said, I've never experienced a car that would come up to "normal temp" on the gauge as quick as the RL we just acquired.
I realize it's summertime in the south & hot as hell but my car is up to the normal temp on the gauge before I reach the end of the road that I live on & it's only 1/2 mile long.
Granted, it doesn't rise any farther than that while driving with a/c ON & I've been keeping an eye on the gauges, especially in town.
Anyway, in my experience in situations like yours, I'd be looking at possible electric fan failures & their sensors & air trapped in the cooling system on top of the things you're already preparing for.
The cooling fans on most cars are designed to come ON when the a/c does.
Good luck
With that said, I've never experienced a car that would come up to "normal temp" on the gauge as quick as the RL we just acquired.
I realize it's summertime in the south & hot as hell but my car is up to the normal temp on the gauge before I reach the end of the road that I live on & it's only 1/2 mile long.
Granted, it doesn't rise any farther than that while driving with a/c ON & I've been keeping an eye on the gauges, especially in town.
Anyway, in my experience in situations like yours, I'd be looking at possible electric fan failures & their sensors & air trapped in the cooling system on top of the things you're already preparing for.
The cooling fans on most cars are designed to come ON when the a/c does.
Good luck
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projektvertx (07-01-2016)
#6
Senior Moderator
While we're here, the driver's side fan is for the radiator and the passenger's is for the A/C condenser.
#7
Thank you all for the tips, I have completed replacing the thermostat, 2 temp sensors and as well the radiator cap. After completed i use lisle to burp the coolant for trap air. The car has been service for the timing belt as well the water pump, car now has 165k. I had the car running for 45 mins with the AC full blast at auto mode, outside temp is 81 degrees and the temp never move and stayed at 40%. Still early to tell need to test the car when it reaches 100 degrees on the weather here in LA. About the fan both kick in when the A/C is not on and turned off, When the A/C is on both fan still kick in. I had replaced the A/C condenser fan 2 months ago since its making a grinding sound.
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GK83
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09-13-2014 12:48 AM