AC not getting as cold

I have always used Auto. I set it to 68 and it’s been fine. This is the baseline.

It was 87 today and I did what I usually do and I was roasting. Had to drop it down to 60 to feel comfortable and even then it wasn’t cold.

This isn’t a thread about the fan speed. I’m discussing actual air temp. Is this low refrigerant? What’s up.

I feel like if refrigerant was low it wouldn’t be getting cold enough to make me comfortable at all. When it’s on LO it gets very cold.

 

If you didn’t break something in your escapades , this does the trick via Carista, temp dial cal

 

first off, where in the heck is it 87 degrees out?!!!

 

It’s still bikini weather where I’m at, I’ll PM you pics of my tan lines

 

Especially at that altitude. (He’s on 37’s)

OP, is your cab air filter clean?

 

^double like

 

Were you idling in slow moving traffic? If the condenser isn’t getting good air flow, it’ll cause warm air to blow inside.
How was the humidity? Sometimes high humidity causes the evaporator to freeze up also causing warm air to blow.

Could also be low refrigerant but if it was fine before and suddenly changed, it could be one of the above.

 

What he said ^^^^^

never had a cooling issue after this adjustment. I was concerned about winter (Canadian) and that adjustment made zero difference to the heat cycle.

 

I am in the Keys right now and it is HOT. There is a huge difference in settings on this truck vs previous gens. For full cooling I turn AC button on, and put in auto and max cold. Just turning it from "Low" to 60F makes a huge difference in temp of the air.

As others said, calibration is off, but my black on black TRD Pro cools off nicely as long as I have the temp set on as low as it will go and then adjust for a while with HVAC vent config and fan speed until the cabin cools enought to start increaseing temp. Frustrating.

Also learned that in "Eco" mode is just plain sucks. Gotta take it out of "Eco" for max cooling.

 

Speaking of filters .. is there a source for any after market cabin or engine filters yet ?

 

AC compressors on cars are on/off devices. Unless it has hot-gas bypass or a VFD controller, it’s just either full on or off.
That being said, most are the same capacity as a normal house 1 to 1.5 ton or 12-18k BTU’s. The only way you’ll ever feel this maximum capacity is on your MAX cooling setting.
If you decide to have a set point in your truck (say 72F) the climate control system is mixing heat with your always-wide-open A/C to raise the supply temperature to something that creates equilibrium in the cab.
This supply temp is the result of some maths by algorithms and a PID loop.
When you change your “temp dial calibration” you’re simply telling the climate control to introduce an offset of -2 degrees. Instead of taking the truck down to 72F as I said above, the truck will take the temp down to 70F while still displaying 72F. You have introduced an offset of 2 degrees F.
You think the AC is working better because the discharge temp is now colder (blending less warm air) and your truck is 70F.
My humble suggestion is to stop dicking with cal factors and just set the climate control a few degrees lower.

 

or change the cal once and just use it as we have with all the other vehicle we have had and not have to think about it again.

and not every time, I want 68, so let me set it to 66 .

 

Or not change the cal at all

 

or change it and be done , HA

 

Near 90F today and I would like the air out of the vents to be colder. Did the cal adjust, non Eco, Lo or 60, with and without recirc... would like colder air.

 

At least he’s putting his sliding rear window to use.

 

Is it likely the cooling air temp will improve (get colder) as the break in advances? I have 1300 miles and have used the AC only a few times before today.

 

If you have one of those IR temp guns or a multimeter with a thermocouple, you can check the discharge temp from your dashboard vents. I’ve commonly measured below freezing on MAX, recirc.
Most GM vehicles have this capacity. Will let you know when (if ) I get my Tundra.

 

I used my temp gun and measured 48F-54F at LO, 60F, recirc on and off. I know this should be a reasonable cool air setting, but it sure seemed a while to get there and the cabin is slow to cool down. What is a normal outlet temp with AC maxed? is there any benefit to close the rear seat vents?

 

ceramic tint all around

 

Seems a bit weak to me. Do you get the same result if you’re driving as opposed to parked? Only other thing I can think of is a dirty filter impeding the flow of air. mill have my truck next month and can compare numbers then. Good luck!

 

I tinted the sunroof and it made a noticeable difference.

 

I was having the same issue, just changed my cabin filter, it was nearly clogged at only 9,000 miles. Made a huge difference on improving the air conditioner.

 

My filter was toast at 4k, surprised me ... I should have took a pic.

 

The truck is new with only 1300 miles. I did not check the cabin air filter but cannot imagine it would be dirty enough to cause the AC temp to be running warm. The 54F-60F temp output was measured with the truck moving at a normal medium speed. I think it is an item to have the dealer check.

 

Been studying the S-Flow button. I have been keeping it on (flow focused on front seat) but I think i will run it in the off position with more cooling for the cab and see if it makes a difference.

 

I don’t even think I have that button