Lowest A/C vent temps in 90 degree Florida weather? - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 4 Old 06-13-2019, 06:19 PM Thread Starter
Compression Ignition Addict
 
Join Date: Apr 2012
Posts: 498
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 1 Post(s)
Quoted: 19 Post(s)
Feedback Score: 0 reviews
Lowest A/C vent temps in 90 degree Florida weather?

My a/c system was low on freon so I have filled it to pressures 32/175 at about 80 degrees out. It was almost 90 degrees out today and I am able to get the a/c vent to the right of the steering wheel at 45 degrees on recirculate on the second lowest setting. Should the I be able to get the temp in the 30's or should I not mess with anything?

2005 Dark Blue F-250 Harley Davidson 4x4. SCT Livewire TS, 4" Silverline TBE, Sinister intake elbow/intercooler piping, Blue spring, 6.4 banjo bolts, Sinister coolant filter, Fleetguard OAT, IPR EGR delete, ARP studs, 270 amp alternator with 2/0 wires.
Invasivore is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 06-13-2019, 08:00 PM
Premium Member
 
Join Date: Aug 2018
Location: Southern Indiana
Posts: 1,941
Thanks: 3
Thanked 185 Times in 181 Posts
Mentioned: 58 Post(s)
Quoted: 423 Post(s)
Garage
Feedback Score: 0 reviews
Yeah, that temp and pressures are about right -- an orifice tube system is never gonna be as cold an expansion valve system

Another thing to consider with a 'leaky' system that you need to add gas to very many times is the makeup of the refrigerant(134) -- you will usually see the low pressure reading be higher than it should and not get the cooling

134 is a mixture of gasses and the part with the smaller molecules will leak out leaving the larger molecule gas as the only one in the system -- without the proper ratio, the system will not cool as well and have higher low pressure readings

Evacuating the system and starting out with a fresh 134 gas will fix the problem -- fix the leak first

In my defense, I was unsupervised
.
2006 F250 Lariat FX4 cclb
Torque Pro and OBDLink MX bluetooth monitor
General note:
For all those wanting a premium silicone sealer Kubota 70000-73764 is the best your gonna find. This is a hybrid gray silicone that uses solvent rather than acid to start the curing reaction, this makes it safe for aluminum and and any surface that involves coolant.
Hydro is offline  
post #3 of 4 Old 06-14-2019, 04:59 AM
Compression Ignition Addict
 
The Evil Twin's Avatar
 
Join Date: Jan 2018
Location: Northern Virginia
Posts: 838
Thanks: 20
Thanked 29 Times in 28 Posts
Mentioned: 10 Post(s)
Quoted: 165 Post(s)
Feedback Score: 0 reviews
Any lower than 40 supply air and you may get evaporator frosting at lower ambient temps. The coil surface is several degrees lower than your supply air.
Quote:
Originally Posted by Hydro View Post
Another thing to consider with a 'leaky' system that you need to add gas to very many times is the makeup of the refrigerant(134) -- you will usually see the low pressure reading be higher than it should and not get the cooling

134 is a mixture of gasses and the part with the smaller molecules will leak out leaving the larger molecule gas as the only one in the system -- without the proper ratio, the system will not cool as well and have higher low pressure readings
134a is a zeotropic refrigerant. You can charge it as a gas or liquid because it is not subject to fractionation. You might be thinking of 410a which you do have to evac + charge if it leaks because the blend ratio will change o


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

2015 Oil Burner
CCLB Lariat Ultimate, 10k, Plow Package.
Mods have begun: 2wd Valance, Bully Dog GT, smoked lenses

Last edited by The Evil Twin; 06-14-2019 at 05:00 AM. Reason: forgot quote response
The Evil Twin is offline  
Sponsored Links
Advertisement
 
post #4 of 4 Old 06-18-2019, 07:11 AM Thread Starter
Compression Ignition Addict
 
Join Date: Apr 2012
Posts: 498
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 1 Post(s)
Quoted: 19 Post(s)
Feedback Score: 0 reviews
Should I bump it up to 40 psi on the low end?

2005 Dark Blue F-250 Harley Davidson 4x4. SCT Livewire TS, 4" Silverline TBE, Sinister intake elbow/intercooler piping, Blue spring, 6.4 banjo bolts, Sinister coolant filter, Fleetguard OAT, IPR EGR delete, ARP studs, 270 amp alternator with 2/0 wires.
Invasivore is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome