Got overheated and felt like AC wasn't working

I got overheated climbing in an out of cab yesterday. It felt like AC wasn't working as hard as I wanted. Went to recirculating air. Helped but I wanted more.

Just wondering if I were to paint the top of cab white if that would help on sunny days.

It was hot and muggy yesterday so I let my truck run with AC on while loading tractor on trailer. I had to stop halfway to cool down.

Getting old sucks.

If all goes well tomorrow, I wouldn't be trailering tractor to WTH any more to mow. . I'm selling the property.

Feel the floor and front cowl. If they feel above warm, they need insulation. White roof is a good idea. Jim

when it's humid it's just plain hard to cool down. when you're old and it's humid it's darn near impossible to cool down. ask me how I know. my 17 year old F250 has never had anything done to the AC other than a little go juice every couple of years and it doesn't really cool till you're moving and the rpms are up

Is there a heater? Is the valve turned off, hoses cold?

If the top is not insulated, feels hot, then some insulation would help. Styrofoam, thermal blanket, duct board. The white or silver paint will help some, I see school buses painted white, couldn't hurt.

You are sitting in a glass fishbowl. AT best you can only cool down about 25 degrees from the OAT. crack a couple windows for a little airfloaw.

Put a thermometer in one of the discharge vents-it should read @30* cooler then ambient temperature - 40*ish.
All of the cab tractors I have driven always seem hot to me-it's all that glass making the greenhouse effect. And I hate the a/c air blowing directly on me; I just want it to blow around me. But what keeps you hot also is all the interior - the seat, steering wheel, dash board- all that heat needs to removed for the cab to be comfortable, and then you!
And like you say, the older we get, the less heat we can tolerate. Last fall I ran a combine when it was 50* or 60* ambient. I had to have the a/c running; but when the sun went down, I had to turn it off.
I really doubt anything will help as long as the sun is heating up the cab thru all the glass, unless you stay in the cab for 4 or 5 hours without stopping. Mark.

Tinted windows help a ton. Makes night time work a little harder but makes sitting in the cab on a 100 degree sunny day a pleasure.

Do you have a circulation Fan in your Cab? Really helped me. I do not like tinted windows.

I think the tops of school busses are painted white for that reason, at least down south. I don't have a cab, just a canopy that's black, but the top of it's painted aluminum. Now I need to put some sound deadening material on the underside, it's noisier that before I put the canopy on.

Please be careful. Heat exhaustion/ stroke is no joke.

Vito

In my case the AC wasn't working. I've had the truck in the shop more than two weeks trying to get it fixed. They had a hard time getting a compressor and then the coolant lines had different fittings.

Good question Just wondering if I were to paint the top of cab white if that would help on sunny days.


Answer in theory is YES however just how much ?????? Probably not very much grrrrrrrrr

John T

I do some AC work for the local Bota dealer all I have repaired I was impressed how well they cool with all that glass. It is strange most of the AC work I do is in the spring with folks getting it repaired before it gets real hot.

I doubt your has an issue that's speculation most I see are high hour workers that are run hard and put up wet...

Make sure the drive belt is in good condition and tight. Look into the condenser for restrictions (grass) I ask the dealer to confirm that before he drops one off every time they miss that. I take the battery out so I can get a straight shot at it that's where they fudge up.

Its should have a cabin air filter most I work on they are gone : (
I have ran across two with a leaking evaporator. When I get time I will see if I can post the diagnostic from the manual for reference for others with AC its straight up and simple (at least to me)

The hard part the system is so spaced out and covered up. Its a diesel I don't want to run it in the shop so looking for leaks I have to get it out of the wind. Then the evaporator is either in the roof are in the floor.

I tell the dealer I would be more than happy to advise are train one of their mechanics but none of them want anything to do with AC : (... It does not help the dealer had rather drop it off at my shop than invest in Equitment to work on AC...

Just like your engine cooling system coolant/refrigerant absorbs the heat air takes it away. WINK WINK...

I enjoy the adventures of GEO : ) I also enjoyed the knowledge of BOB I wish he would make a return : ) I always learn sum'N from a real AC expert Bob was the man...

Does it have a cabin air filter? If so, it is probably plugged solid.

How well I know that, got it back in the 70's and still feeling the efects of it.

Check and see if there are any filters in the air system George. A dirty air filter can make heat/cold pretty iffy.

Put some "mirror" vehicle wrap vinyl on top of your cab.

Will protect paint from sun damage to and can be peeled off when you want.


Quite reasonable prices too.

(quoted from post at 14:12:12 05/25/21) Put a thermometer in one of the discharge vents-it should read @30* cooler then ambient temperature - 40*ish.
All of the cab tractors I have driven always seem hot to me-it's all that glass making the greenhouse effect. And I hate the a/c air blowing directly on me;
And like you say, the older we get, the less heat we can tolerate.

Click to expand...

More glass = more heat from the sun. My 2090 Case does not get near as hot in the cab as the Magnum. And the older I get, the less cold I can tolerate.

jm recommended I take the top of the cab and put
insulation with aluminum foil to block radiant
heat. I wish I could find the old craft/aluminum
fiberglass insulation.
It's going to be a round to it job.

(quoted from post at 15:42:30 05/26/21) jm recommended I take the top of the cab and put
insulation with aluminum foil to block radiant
heat. I wish I could find the old craft/aluminum
fiberglass insulation.
It's going to be a round to it job.

Click to expand...

I think your talking about foil faced duct board.
https://www.homedepot.com/p/Master-Flow-48-in-x-120-in-Duct-Board-R-6-DBOARD1/202974245