Evaporator turns itself on and off - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

moloko · 03-04-2019, 04:43 PM

Hello! Yesterday in a travel with cool weather without using AC I noticed that in some moments I feel a little wind coming out of the evaporator and then cut, all in about two seconds or less.

In the 3-hour journey I felt like four times he did the same thing...

The AC didn't leave it activated.

I also realize that the button to circulate outside air, which I have always activated when start the car, is deactivated after this issue with the evaporator... This is because the evaporator turns on automatically and then cuts in random time.
The AC fan knob is fine. What could this be? A false contact?

CamaroFred · 03-04-2019, 08:33 PM

Quote:

Originally Posted by moloko

Hello! Yesterday in a travel with cool weather without using AC I noticed that in some moments I feel a little wind coming out of the evaporator and then cut, all in about two seconds or less.

In the 3-hour journey I felt like four times he did the same thing...

The AC didn't leave it activated.

I also realize that the button to circulate outside air, which I have always activated when start the car, is deactivated after this issue with the evaporator... This is because the evaporator turns on automatically and then cuts in random time.
The AC fan knob is fine. What could this be? A false contact?

If you have the vents aimed at the windshield sometimes the A/C will come on to dehumidify. I have also read that sometimes the A/C comes on just to circulate the gas.

We don't have a button to circulate outside air. That is the default. We have a button to recirculate inside air that is useful when running the A/C when starting a vehicle that is very hot on the inside. I believe it is on a timer so you do not suffocate.

Rock-It Man · 03-05-2019, 06:02 AM

If you have the window defog on, the AC will run whenever the temp is above some pre-determined point, somewhere just above freezing.

moloko · 03-05-2019, 04:41 PM

I don't seem to have explained myself well.

I don't have my defog activated or anything. My AC is totally deactivated.

But a few days ago I noticed that at certain times the evaporator in the cabin starts to draw air for a one or two seconds and then cuts... This isn't normal

In the two years that I have the vehicle never did that...

It's like the AC fan knob is failing and turns on and off only at certain times but only for a few seconds, it's almost undetectable.... It's like a false contact.

Example:
Always, when I start my vehicle, I press this button (recirculate air, with AC off)

and after using the vehicle for hours and hours the button is still on, unless I turn the AC on and off.

It was always that way. What happens now?

The evaporator fan turns on randomly and blows for a few seconds and then turns off...

I have to be manually activating the recirculate air button all the time as the evaporator turns itself on and off...

This has never happened to me before...

Ernie70 · 08-26-2019, 09:29 AM

I am having the exact same issue! Thought I was loosing my mind lol. Have you found out the problem yet by chance ??

G8One2 · 08-26-2019, 09:49 AM

You could unplug the compressor or remove the fuse if it bothers you that much. It's probably designed to do that for previous states reasons.

Ernie70 · 08-26-2019, 09:52 AM

I live in Florida , I need the compressor LOL. It just odd that it is so random at times. I did a lil research and can't really find out why it is doing it.

Ernie70 · 09-25-2019, 08:13 AM

Ok , so I believe that I have a pretty solid theory on this . I have noticed on my way to and from work , that if I have NO AC controls on , and only the RECYCLE air button. The the RECYCLE will turn it self off at about the same time length of driving every time. When I run the RECYCLE air ON , with just the fan setting on (again no AC) , it will not turn itself off. What I am being lead to think is that the RECYCLE setting on with no other AC settings or fan on , the RECYCLE is on a timer (such like the rear DEFROST) to automatically turn off after a set time .

03-04-2019, 04:43 PM	#1
moloko Drives: Camaro V6 2011 and 2014 V6 Join Date: May 2017 Location: Sth Am Posts: 120	Evaporator turns itself on and off Hello! Yesterday in a travel with cool weather without using AC I noticed that in some moments I feel a little wind coming out of the evaporator and then cut, all in about two seconds or less. In the 3-hour journey I felt like four times he did the same thing... The AC didn't leave it activated. I also realize that the button to circulate outside air, which I have always activated when start the car, is deactivated after this issue with the evaporator... This is because the evaporator turns on automatically and then cuts in random time. The AC fan knob is fine. What could this be? A false contact?

03-05-2019, 06:02 AM	#3
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,031 View My Garage	If you have the window defog on, the AC will run whenever the temp is above some pre-determined point, somewhere just above freezing.

03-05-2019, 04:41 PM	#4
moloko Drives: Camaro V6 2011 and 2014 V6 Join Date: May 2017 Location: Sth Am Posts: 120	I don't seem to have explained myself well. I don't have my defog activated or anything. My AC is totally deactivated. But a few days ago I noticed that at certain times the evaporator in the cabin starts to draw air for a one or two seconds and then cuts... This isn't normal In the two years that I have the vehicle never did that... It's like the AC fan knob is failing and turns on and off only at certain times but only for a few seconds, it's almost undetectable.... It's like a false contact. Example: Always, when I start my vehicle, I press this button (recirculate air, with AC off) and after using the vehicle for hours and hours the button is still on, unless I turn the AC on and off. It was always that way. What happens now? The evaporator fan turns on randomly and blows for a few seconds and then turns off... I have to be manually activating the recirculate air button all the time as the evaporator turns itself on and off... This has never happened to me before...

08-26-2019, 09:29 AM	#5
Ernie70 Drives: 2010 Synergy Green Camaro 1LT Join Date: Jun 2019 Location: Orlando Posts: 202	I am having the exact same issue! Thought I was loosing my mind lol. Have you found out the problem yet by chance ??

08-26-2019, 09:49 AM	#6
G8One2 Drives: 2014 Camaro 2SS Join Date: Feb 2015 Location: Metro Detroit Posts: 492	You could unplug the compressor or remove the fuse if it bothers you that much. It's probably designed to do that for previous states reasons.

08-26-2019, 09:52 AM	#7
Ernie70 Drives: 2010 Synergy Green Camaro 1LT Join Date: Jun 2019 Location: Orlando Posts: 202	I live in Florida , I need the compressor LOL. It just odd that it is so random at times. I did a lil research and can't really find out why it is doing it.

09-25-2019, 08:13 AM	#8
Ernie70 Drives: 2010 Synergy Green Camaro 1LT Join Date: Jun 2019 Location: Orlando Posts: 202	Ok , so I believe that I have a pretty solid theory on this . I have noticed on my way to and from work , that if I have NO AC controls on , and only the RECYCLE air button. The the RECYCLE will turn it self off at about the same time length of driving every time. When I run the RECYCLE air ON , with just the fan setting on (again no AC) , it will not turn itself off. What I am being lead to think is that the RECYCLE setting on with no other AC settings or fan on , the RECYCLE is on a timer (such like the rear DEFROST) to automatically turn off after a set time .