AC temp
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Joined: May 2016
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From: North Dakota
AC temp
Took my 15 Z51 A8 (29K miles) out this afternoon in 95 degree outside air temp. AC was cool but didn't seem to be as cold as I thought it should be. Didn't seem to make any difference on how low I set it and had it blowing on bi-level. Has anyone had to have their freon topped off?
Is that the way it should be or maybe a problem? Didn't have a thermometer to check the air coming out of the ducts.
Is that the way it should be or maybe a problem? Didn't have a thermometer to check the air coming out of the ducts.
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The less air moving through the condenser, the less efficient the cooling.
A trick I use to change to recirculated air if stuck in traffic during warmer times
A trick I use to change to recirculated air if stuck in traffic during warmer times
Last edited by KenHorse; Jun 27, 2020 at 07:36 PM.
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Took my 15 Z51 A8 (29K miles) out this afternoon in 95 degree outside air temp. AC was cool but didn't seem to be as cold as I thought it should be. Didn't seem to make any difference on how low I set it and had it blowing on bi-level. Has anyone had to have their freon topped off?
Is that the way it should be or maybe a problem? Didn't have a thermometer to check the air coming out of the ducts.
Is that the way it should be or maybe a problem? Didn't have a thermometer to check the air coming out of the ducts.
Last edited by Let It Ride; Jun 27, 2020 at 07:57 PM.
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If you haven't tried using the recirculating air setting as Ken mentioned, givee it a try. It can make a difference.
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The default is recirculating..... C7s have known poor HVAC performance.... don't know about the '19s as I just got mine. My '15 and several friends with '15 C7s had problems.... dealers (plural) go "Huh?" The '19, thus far, seems fine....
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Took my 15 Z51 A8 (29K miles) out this afternoon in 95 degree outside air temp. AC was cool but didn't seem to be as cold as I thought it should be. Didn't seem to make any difference on how low I set it and had it blowing on bi-level. Has anyone had to have their freon topped off?
Is that the way it should be or maybe a problem? Didn't have a thermometer to check the air coming out of the ducts.
Is that the way it should be or maybe a problem? Didn't have a thermometer to check the air coming out of the ducts.
Safety Car
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From: Margate, FL
Once you get the interior cooled down (use recirculating) you can use bi-level to direct air to the seat fans to help them cool your backside (for about 5 mins). Like others noticed sitting in traffic seems to stress the system. With the exhaust running thru the central tunnel a lot of heat transfers into the cabin so you have to put the temperature down lower. Kind of disappointing as the one thing GM traditionally did well was HVAC systems... or so I thought.
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I've noticed this as well. Bi-Level seems to mix in some warmer air for reasons I can't figure out. So if you want it really cold use the dash vents only.
Once you get the interior cooled down (use recirculating) you can use bi-level to direct air to the seat fans to help them cool your backside (for about 5 mins). Like others noticed sitting in traffic seems to stress the system. With the exhaust running thru the central tunnel a lot of heat transfers into the cabin so you have to put the temperature down lower. Kind of disappointing as the one thing GM traditionally did well was HVAC systems... or so I thought.
Once you get the interior cooled down (use recirculating) you can use bi-level to direct air to the seat fans to help them cool your backside (for about 5 mins). Like others noticed sitting in traffic seems to stress the system. With the exhaust running thru the central tunnel a lot of heat transfers into the cabin so you have to put the temperature down lower. Kind of disappointing as the one thing GM traditionally did well was HVAC systems... or so I thought.
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From: North Texas
As I understand the bi-level setting it's supposed warm the feet a little, but provide cooling through the dash vents. Scenario: Cold day, but the sun is shining brightly and you need some cooler air up top to stay comfortable, but you also need warmer air out of the heater vents to keep the feet warm.
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From: Roseville Ca.
My 2014 cooling system is weak compared to the last 6 cars I have owned. Others here say the exhaust is transferring heat to the interior, and it seems like it. Also, the rear window seems to transfer a lot of heat inside the coupe. The bilevel setting transfers some of the air downward and makes it feel warmer overall, so I mainly use the upper vents only on warmer days. I usually have the ac on manual (auto off) so I can maximize the fan output. In auto the fan will adjust down even if it is not as cool as I like. In fact in auto the fan seems to speed up and slow down a lot more than I think it should. When in
slower traffic on a hot day (over 90) the system can't keep up with the setting, say if I set it to 68 the car will never get less than 80. System is charged and operating as designed (poorly). I still love by vette.
slower traffic on a hot day (over 90) the system can't keep up with the setting, say if I set it to 68 the car will never get less than 80. System is charged and operating as designed (poorly). I still love by vette.
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From: Margate, FL
As I understand the bi-level setting it's supposed warm the feet a little, but provide cooling through the dash vents. Scenario: Cold day, but the sun is shining brightly and you need some cooler air up top to stay comfortable, but you also need warmer air out of the heater vents to keep the feet warm.
Reading the manual it seems to indicate the best option is to just put the system in Auto and let it do its thing.