how cold is the a/c supposed to be - Page 2 - Diesel Forum

Dubco1 · 08-04-2005, 06:25 AM

OK, I follow everything you said as it will all affect the end result. One thing you left out was the exact refrigerant charge amount. Do you know what is in your truck (stock is 2 lbs 10 ozs) or did you charge it to a certain value on the gauges? Inquiring minds want to know. I am still hot......

FOMOGO

JustSomeDude · 08-04-2005, 06:26 AM

Thier is an SSM on the 01 trucks about adding 1 more lb of freon to the system than what is stated on the underhood label.

This is to cure the problem of the a/c blowing warm at freeway speeds.

If you supply me with your VIN I can give you the SSM#. [img]/ubbthreads/images/graemlins/smile.gif[/img]

Dubco1 · 08-04-2005, 06:55 AM

And what is an SSM?

FOMOGO

07HEMI4ME · 08-04-2005, 08:04 AM

I have one of Bob Riley's A/C monds and mine is blowing at ~33-34 deg... [img]/ubbthreads/images/graemlins/smokin.gif[/img]

**Captcaper** · 08-04-2005, 09:23 AM

In what mode are you guys measureing? MAX,BI LEVEL,etc? It seems to make a big difference with mine. MAX being the coolest of course.

Raymondb · 08-04-2005, 09:34 AM

[ QUOTE ]
Ok Bob, you gotta spill the beans on how to get that temp. I haven't seen temps like that since R-12. Help us hot people out. I already have your valve installed and get about 48 degrees.

FOMOGO

[/ QUOTE ]

I think Bob needs to hie himself over to the SCPSD get together next weekend and tune up all our A/C units.

Mine blows cold enough for Upstate SC, but I was in Canada last week when it was 100* here. Then again, I ride to work with the windows open in the mornings and the A/C full tilt for the return trip in the evenings.

plainredtruck

444-4D · 08-04-2005, 10:21 AM

[ QUOTE ]
In what mode are you guys measureing? MAX,BI LEVEL,etc? It seems to make a big difference with mine. MAX being the coolest of course.

[/ QUOTE ]

Those are some key bits of info that are almost always missing. Those along with ambient temp, engine speed, and fan speed can easily make 20 degrees difference in vent temps. One thing I'm sure of is that idling, fan on high, blowing outside air, and 99 degree ambient temps, Bob Rileys truck will not blow 34 degree air.

chris bottom · 08-04-2005, 05:05 PM

ok i also have to ask whats a SSM and what exactly is the importance of this to my 01 truck......all info is appreciated since this 110 heat index garbage is starting to piss me off [img]/ubbthreads/images/graemlins/vomit.gif[/img]

Dubco1 · 08-04-2005, 05:11 PM

Chris I am still waiting for that answer too. This is the first time I have ever heard SSM... Especially directed specifically at 2001s.

Did you see my other AC post I just posted?

FOMOGO

chris bottom · 08-04-2005, 07:37 PM

yup sure did looks like im going to have to insulate those lines and see what happens [img]/ubbthreads/images/graemlins/shrug.gif[/img]

Dubco1 · 08-04-2005, 09:24 PM

It all ads up. Little by little.

FOMOGO

EXCAV8TER · 08-04-2005, 11:57 PM

very easy fix for that bro...remove the fan under the hood and take a flashlight and look at your condensor...I am sure it looks like caked mud in your 99...take a water hose with low pressure and spray your condensor off. you may need to simple green it first. the water will drain out the bottom so dont freak...but after its clean it will blow colder and harder than before...in 100 degree heat mine will give me goosebumps in about 5 minutes after leaving a jobsite it has sat at all day...
Tom [img]/ubbthreads/images/graemlins/biggrin.gif[/img]

JustSomeDude · 08-05-2005, 06:07 AM

An SSM is a special service message available to Ford techs and dealership personnel. Kinda like a TSB, but basically they are just engineering summaries for basic common problems that the hotline techs are getting frequent. calls for.

I need a vin to pull them up. [img]/ubbthreads/images/graemlins/smile.gif[/img]

As I recall, their is one for our trucks that states that if the truck has a problem with the a/c blowing warm at freeway speeds that you need to add 1 lb of refrigerant in addition to the amount on the underhood label, it gives a specific charge amount, but as I recall it's about 1 lb in addition to the amount on the underhood and whats listed in the service manual.

Dubco1 · 08-05-2005, 06:59 AM

OK thanks, I will get it run by my dealer today.

FOMOGO

JustSomeDude · 08-06-2005, 12:30 PM

18674 1999-2006 F-SUPER DUTY/2000-2005 EXCURSION - LACK OF A/C COOLING - EVACUATE AND RECHARGE THE A/C SYSTEM
SOME 1999-2006 F-SUPER DUTY AND 2000-2005 EXCURSION VEHICLES MAY EXHIBIT A LACK OF A/C COOLING AT HIGHWAY SPEEDS. THIS MAY BE CAUSED BY RAPID CYCLING OF THE A/C COMPRESSOR CLUTCH DUE TO LOW SUCTION PRESSURES. TO SERVICE VEHICLES BUILT BEFORE 7/18/04, EVACUATE AND RECHARGE A/C SYSTEM WITH: - 45 OZ (1.28 KG) OF R134A ON VEHICLES WITHOUT AUXILIARY AIR. - 68 OZ (1.93 KG) OF R134A ON VEHICLES WITH AUXILIARY AIR (EXCURSION ONLY). THE LABEL ON THESE VEHICLES WILL INDICATE A DIFFERENT RECOMMENDED CHARGE LEVEL. ALL VEHICLES BUILT AFTER 7/18/2004 RECEIVED THIS REVISED CHARGE WHEN PRODUCED, BUT THE LABEL HAS NOT YET BEEN UPDATED IN PRODUCTION. FOR VEHICLES BUILT AFTER 7/18/04, AND ALL OTHER LACK OF A/C COOLING SYMPTOMS, REFER TO SECTION 412-00 OF THE WORKSHOP MANUAL FOR NORMAL DIAGNOSTICS.
EFFECTIVE DATE: 06/10/2005