Green Gem

All Hat No Cattle,

Thanks for this information.

Questions:

- Is it this valve's opening and closing that causes the temperature cycling at the vents? If yes, if that cycling is fairly consistant, would it rule out a problem with this valve?

- Can the valve be adjusted to let things cool longer?

- Would contaminents in the system cause issues with this valve?

- What would be common on both manual and climate controlled systems that could cause this cooling issue? I'm thinking about something that would be affected by outside temperature and/or humidity.

Thanks

Green Gem

digitaltrucker

Read post 12 here: https://www.f150forum.com/f38/ac-tal...265480/index2/

Green Gem

digitaltrucker,

Okay, I see this.

"The A/C pressure transducer monitors the compressor discharge pressure and sends a variable voltage signal representing the pressure to the PCM. The PCM will interrupt A/C compressor operation in the event that the A/C pressure transducer indicates high system discharge pressures. It is also used to sense low charge conditions. If the pressure is below a predetermined value for a given ambient temperature, the PCM will not allow the clutch to engage.

On older systems low pressure cut off was about 25psi and high pressure cut off was around 350-400psi. I do not know what Ford engineers set the values to on these new systems."

What determines the "...value for a given ambient temperature...)? It must be something that is common to both types of systems. Also, if it is controlled by the PMC, there must be some way to adjust it.

Take Care

Green Gem

papa tiger

AT 95degrees 230 psi. high side and 35 psi low side would be ideal. Anything close is great. Obviously 90 psi low and 140 psi high will be a very poor (not cold/comfortable) truck to ride in truck. U need the swing between low and high.

schizbomb

My A/C blows. New Silverado, new Tundra, and '12 RAM freeze me out. Three dealers; no dice. It's a design flaw and they'll never fix it because Ford doesn't have to, they already sold the truck.

FordService

Hi Green Gem,

I reached out to Brittany; she told me she sent you a message this morning. Unfortunately, I do not have access to our Engineering folks; your best bet will be to continue working with Brittany on next steps.

Crystal

djfllmn

iTrader: (1)

I may be able to shed some light on this. the lower level trucks(XL,STX) only have 4 fan speeds. Iirc my XLT has 6 or 8

powerboatr

sort of disagree
to many variables sitting still idling
even though we have electric fans, they cant move as much air across the condenser as moving at 30 mph
is the truck facing the sun? lots of glass to hold back inner temps and defeat the outside heat.
what is the relative humidity
what is outside air temp
what is inside air temp..are you idling after you just opened up the hot truck
generally if it was cold and you stopped and idled the air may warm up slightly..if it goes way over to warm then your low on charge or the orifice is clogged

if we have engine driven fans and you ramp up the rpms then yes you could move tons more air and increase cooling

ours will freeze you in short order,
we also if its sitting in the sun, open all the windows for a minute to vent out the hot stale air, this makes a world of difference
remember the ac sytem is exchanging hot air for cold or removing heat
the by product is cold return air, the hotter the cabin is the less cold the product will be .
also leave it on MAX or recirc...as then its only cooling cabin air vice trying to cool down 100 plus inlet air
in humid areas you may have to let it blow on fresh a few minutes before shutting off to help mitigate moldy smells

All Hat No Cattle

#1- Yes. But at a steady engine rpm and a steady cooling load, the valve will "settle down" and the supply air temp should be steady, until the compressor is shut off by the cold air or low pressure sensor (Thermistor). The only accurate way to check it is with gauges hooked up.

#2- As far as I know, no. It either works right or replace it.

#3- Yes, contaminants can really screw it up, especially moisture in the system.

#4- You've got me. Hard to say from here.

Be aware that I'm giving you info from the 2010 shop manual. I can't vouch that yours is exactly the same, but the basic components work the same.

Signs of a worn orifice tube or thermal expansion valve:

• Poor A/C system performance
• When a technician has determined it has become dirty or clogged

- See more at: http://www.firestonecompleteautocare....iYiqrApE.dpuf


Item Description 1 A/C evaporator core 2 A/C evaporator core outlet temperature thermistor 3 Thermostatic Expansion Valve (TXV) 4 Manifold and tube assembly — TXV 5 A/C charge valve port (low side) 6 Manifold and tube assembly — A/C compressor 7 A/C compressor 8 A/C pressure relief valve 9 A/C pressure transducer 10 Low-pressure vapor 11 High-pressure vapor 12 Low-pressure liquid 13 High-pressure liquid 14 A/C condenser core 15 A/C receiver/drier 16 Manifold and tube assembly — receiver/drier 17 A/C charge valve port (high side)

Green Gem

Thanks Crystal, I heard from her and this is our conversation.

Green Gem,

"Hello Green Gem,

My apologies for the delayed response; I've been a bit bogged down with PMs and am working through them as quickly as possible. As per our previous conversation, I have made sure to document everything you've said thus far to your regional customer service manager, who is my highest point of contact. I am unhappy to hear that you are unhappy, and am able to document feedback, whether it be for a dealership, the product itself, or something more general.

I have looked into your case freqently since its consumation, and have done so this morning as well. I see that you spoke to a supervisor and that the case has reached a final resolution. This is something that, as a representative here on the forum, I am unable to overturn. Your best option at this point is to continue working with local dealers in order to reach the best resolution possible.

Again, I sincerely apologize for the lack in response the last few days; I have exhausted all of my limited resources in trying to best assist you with this concern, including looping in the regional customer service manager. I've seen publicly that you've spoken of legailities, which you are free to do. I, however, will be unable to assist further should you truly decide to seek legal counsel.

If anything arises, I will absolutely continue to do all within my power to help. Have a great day.

Brittany"

Brittany,

Dealing with that pair of morons at the Florida call centre was a complete waste of my time and did nothing to resolve the issue with my truck. All they do is regurgitate crap from their list of canned comments and lead one to believe that they are actually trying to help.

What good does it do to be dealing with someone in Florida when my truck is in Canada? My CSM was even fairly new on the job as well. What was supposed to have been arranged at the last dealership did not happen as agreed. Was she just trying to humour me?

I asked permission to take the truck to a private A/C shop. That request has been ignored. If that was done, and they repaired the truck, I asked if Ford would cover the repair cost. Again, that was ignored.

The so called supervisor was supposed to make contact with me within 48 hours. She was about six hours late. Not only was she late calling, she did not bring herself up to date with what had already taken place.

That moron, and she is a moron, suggested that I take my truck to another dealer to have it looked at. Three dealers isn't enough for her.

What "final resolution" has my case reached? All that has happened is that Ford has wasted my time, run me through dealers that have no intention of trying to fix the problem and make me deal with morons who don't even work for Ford. That is not customer service, its frustrate the customer until he goes away.

I'm sure that you are aware that I started a post on the forum about the A/C issue and after only a few days, it has over 8,000 reads and many responses. Your customers are working far harder to solve this issue than Ford's dealers are. Ford has many pissed off customers and they need to fix this issue for us all.

If you have gone as far as you can with this issue ("I have made sure to document everything you've said thus far to your regional customer service manager, who is my highest point of contact."), please tell me how to go higher in Ford's bureaucracy.

I want to speak with Ford engineering. I want to have a Ford representative come for a ride with me on a hot day. You people would not be willing to sweat your butts of in my truck like I have to.

Ford should be ashamed to put customers in this position.

Earlier today, I was out with my wife and my Siberian Husky. While out, I left my truck idling in a car wash while I washed it. In that shady area, its vent temperatures did not quite make it down to 45F running in max with the fan going full bore. I believe that Ford knows what is wrong with these trucks. It is time to make things right.

Brittany, you say "If anything arises, I will absolutely continue to do all within my power to help.". The A/C issue still persists. Help with that!

Note: I will be adding this information to my forum post.

Brittany, do you work for Ford, or are you with a private call centre too?

You can help me further by sending all the data in my file to the following person:

Ford Motor Company of Canada, Ltd.

The Canadian Road
P.O. Box 2000
Oakville, Ontario
L6J 5E4

Attention: Dianne Craig, President and Chief Executive Officer

Green Gem