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AC Problem after new system install

jed1154 on Tue May 21, 2013 8:58 PM User is offline

Year: 2005
Make: Ford
Model: F-250
Engine Size: 6.0
Refrigerant Type: R134
Ambient Temp: 90

I took my truck to my local dealer because they have always given me good service. Well, they have changed names and I decided to take it in for it not cooling at idle. They determined that the compressor was shot and it needed a new fan clutch. No clue if that was true, but at any rate, an arm and a leg later, that was replaced as was the dryer and orifice tube. Now, at idle the truck cools well. 90 degrees and itll hold 43 degrees pretty well. I notice an immediate drop in temperature by a couple of degrees as soon as I come to a complete stop, then it recovers to where it was before I stopped, then when I accelerate, the temperature drops a degree or two and then recovers. I THINK thats normal, I don't know. The problem is that in the evenings when I accelerate the temperature will climb 20 degrees, get humid...and then eventually recover. I think the compressor is cutting out completely during this time. Its more pronounced when I accelerate over 2000 RPM. However, cruising at 80mph is also over 2000 RPM and the AC has no problem. It does seems to fluctuate a bit. Itll go up 5 degrees, then back. Its been back to the dealer twice now, and this is going to be the third time. They have evacuated twice and refilled and swear up and down its to the proper levels and putting out the proper pressures. I THINK my truck had this exact problem before and it was a pressure switch. Does anyone have any insight?

I kind of feel like if the truck can manage 42-45 (and the occasional 38 at idle) degree air temps when its 90+ outside, then the tech is right about the charge being correct, but something still isnt quite right.
Any advice is greatly appreciated.

Edited: Tue May 21, 2013 at 9:41 PM by jed1154

TRB on Wed May 22, 2013 11:58 AM User is offlineView users profile

45 ounces of R134a.

Could be a few things but a Dealer should be able to narrow things down if they know what they are doing. I would what to know the pressure readings. I would have the check the auto temp sensor.

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jed1154 on Wed May 22, 2013 2:23 PM User is offline

Truck tag says 42oz. I already went round and round with them about that because they charged me for 32 ounces and couldn't tell me how they filled it up all teh way but didnt charge me. Said it was something about there being some in the recovery machine or something. I didn't buy it.

What is the 'auto temp sensor'... Also, when watching it today at 90 degrees out, I did not notice the problem as much or at all when the AC was on recirc. Dont understand it, but still dont think it should jump 20 degrees even with it on 'outside air'. Does this info make any sense to anyone?

Edited: Wed May 22, 2013 at 9:38 PM by jed1154

malibu101 on Tue May 28, 2013 7:44 AM User is offline

I used to have a little Ford Ranger issued by my company. Was a 4 cylinder/5 speed.
It would cut off the compressor when the gas pedal was pushed to the floor. I guess it was designed that way so if you went wide open throttle, all power went to moving the vehicle. I don't know what other years/models Ford may have done this on though.
Are you pushing it close to WOT?

WyrTwister on Tue May 28, 2013 9:58 AM User is offlineView users profile

Quote
Originally posted by: jed1154
Truck tag says 42oz. I already went round and round with them about that because they charged me for 32 ounces and couldn't tell me how they filled it up all teh way but didnt charge me. Said it was something about there being some in the recovery machine or something. I didn't buy it.



What is the 'auto temp sensor'... Also, when watching it today at 90 degrees out, I did not notice the problem as much or at all when the AC was on recirc. Dont understand it, but still dont think it should jump 20 degrees even with it on 'outside air'. Does this info make any sense to anyone?


Could they have pulled 10 oz of freon out of the system , with the recovery machine ? Then put the same 10 oz back in , plus the 32 oz they charged him for ?

God bless
wyr


jed1154 on Tue May 28, 2013 12:38 PM User is offline

Well, the system was properly charged before. The service manager said that the machine only holds so much, so it may have been only possible to pull out 10oz of your refrigerant. He implied that they simply let the rest go to atmosphere. That of course begged the question from me 'if the machine was full, then why didnt you just put 42oz back in ALL from the machine and not charge me for 32 oz?". He told me straight up "i don't know, thats a good question. I have no answer."

The truck does it when accelerating. Not WOT.

WyrTwister on Tue May 28, 2013 1:50 PM User is offlineView users profile

Curiouser and curiouser ? :-(

Were I you , if they ever get it working right , I doubt I would ever go back ?

Best of luck .

Wyr
God bless

PS I have never owned a recycling machine , but I would think they would hold / store enough freon for any size car or pickup truck ?

jed1154 on Tue May 28, 2013 3:04 PM User is offline

Honestly, I went there because I thought they would get the job done right and in one day. Neither happened and I have a sad feeling that I might have to take it elsewhere to get it correctly diagnosed and fixed. Ugh. Ill probably have to take the service manager around because I dont think they believe it has any issue even though I have a photo of the temperature climbing 20 degrees in less than 3 minutes. I dunno. Frustrating. I also took it there because I felt like an AC Tech that went to school specifically for Air conditioning on Ford vehicles would be a benefit.

WyrTwister on Tue May 28, 2013 3:54 PM User is offlineView users profile

If you can not get satisfaction , could you gather up all the evidence and sue them in small claims court ? Maybe , even the hint of that would get things fixed ? Providing they actually have a tech that knows what he / she is foing ?

Or ask the dealership manager for the contact number for the regional or corperate customer relations manager ?

That worked for me once , with a dispute with Montgomery Warde .

God bless
Wyr

jed1154 on Tue May 28, 2013 5:35 PM User is offline

Im not going to sue them over it. Id rather they just give me a portion of my money back, or reimburse me if I have to take it elsewhere. Ill give the service manager a chance to make it right. He requested a ride along. Ill oblige it. HE didn't do the repair and its quite possible that the tech did everything exactly right but without a test drive for 40 minutes, he would not find or see a faulty component. I dunno...ill let them try once more.

WyrTwister on Tue May 28, 2013 11:43 PM User is offlineView users profile

I certainly understand giving them one more chance . Either to fix it right or to refund all your money .

Best of luck to you . :-)

God bless
Wyr

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