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air conditioning

Sent to Car Experts July 24 2005 at 6:11 PM
   

I have a "90" lexus ls400 and I have no pressure on the low pressure side of my a/c system...I have checked the the system for obstructions and found nothing. Could this be a bad evaporator...I have high pressure of 150 lbs up to the evaporator but nothing gets through; therefore no cold air in the car. I know the expantion valve is new. The system just replaced the compressor and was flushed evacuated and 8 ozs of oil with 24 ozs of 134a added. Why doesn't it work?

Customer (name blocked for privacy)
Status:  Closed   Value: $5
Answer
July 25 2005 at 12:12 AM (6 hours and 1 minute and 11 seconds later)
         
REPLIEDCheck Mark
Sounds like it's jjust low on refrigerant. 150lbs on the high side is too low. That needs to be 200-225
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
July 25 2005 at 3:45 AM (3 hours and 33 minutes and 1 second later)
         
Reply to Hammer Time's Post: The vehicle specs call for 24 ozs of refrigerant. I over-filled it once with and blew the seals on the hoses at the pump. that was before i changed a clogged expansion valve.

Customer (name blocked for privacy)
Answer
July 25 2005 at 2:40 PM (10 hours and 55 minutes and 18 seconds later)
         
REPLIEDCheck Mark
You could still have a restriction in the system but 150 lbs is definately too low. Feel the temp of the liguid line which is the one going from the condenser to the expansion valve. If it feels warm to the touch, you have travel. If it is just the same temp as the air, it's restricted. Whatever plugged your expansion valve could be all through the system.
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
July 25 2005 at 3:50 PM (1 hour and 9 minutes and 21 seconds later)
         
Reply to Hammer Time's Post:

This is what I thought also. I feel only hot air comming into the cabin or passenger compartment of the car. And close to the vents it is very hot (the high side line is at room temp). There is no heat exchange going on in the evap. There is a view window and nothing moves past the window. The low side stay's below 10 pounds psi. There is leak through and it will build up if sitting overnight. The presure kind of equalizes. Once started it dropps to 10 pounds max.

I have since disassembled the system and blown air through all the component parts. I don't see any restriction. This is very scary. I have to yet disassemble the low side and blow through that. I guess i will see on Thursday haw that goes.



Mauri
Customer (name blocked for privacy)
Answer
July 25 2005 at 3:56 PM (6 minutes and 13 seconds later)
         
REPLIEDCheck Mark
I hope your evacuating all that air and moisture back out when you recharge it.
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
July 25 2005 at 8:14 PM (4 hours and 17 minutes and 41 seconds later)
         
Reply to Hammer Time's Post:

Well i vacuum for an hour then shot 8 ozs of oil in wwith 24 ozs of 134r.

I don't know I think I'm just going to install a new evap and receiver dryer and try again???



Mauri
Customer (name blocked for privacy)
Answer
July 26 2005 at 1:10 AM (4 hours and 56 minutes and 1 second later)
         
REPLIEDCheck Mark
I was just making sure. 8oz of oil sounds like way too much oil. That could be your problem right there. You may want to flush the condenser while the system is empty.
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
July 26 2005 at 3:40 PM (14 hours and 30 minutes and 24 seconds later)
         
Reply to Hammer Time's Post: I will try the flush idea since I have the system opened. Oh, for the record, I changed the compressor so I needed to refill the system with oil. That's why the 8 ozs of oil. Nothing in the a/c worked when I got the car...the pump was makeing a grinding noise...I thought that's all it was.

Mauri
Customer (name blocked for privacy)
Answer
July 26 2005 at 4:25 PM (44 minutes and 43 seconds later)
         
REPLIEDCheck Mark
No, 8oz is too much. You can never get all of the old oil out and with a compressor change and condenser flush, 4-6oz would have been plenty. The rest is still in the system. I don't have the spec in front of me, but I would expect 8oz to be more than a full charge for that car. At this point I would try to flush whatever oil is in the condenser out without adding any more. Too much oil is just as bad as not enough.
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
July 26 2005 at 4:46 PM (20 minutes and 58 seconds later)
         
Reply to Hammer Time's Post: you could be right about the oil...I did check the spec before I added the oil. I will be cleaning out the system and recharging maybe this weekend.

Mauri
Customer (name blocked for privacy)
Answer
July 26 2005 at 5:07 PM (21 minutes and 44 seconds later)
         
REPLIEDCheck Mark
I live in South Florida and I do an awful lot of A/C repair. That;s too much oil.
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
August 13 2005 at 11:55 AM (17 days and 18 hours later)
         
Reply to Hammer Time's Post: I just want to say...I reopened the system and flushed it. Recarged it and it works beerrrfectly. Thanks for all the help but I solved it myself. There must have been an obstruction in the expansion valve. Audios Amigos

Mauri
Customer (name blocked for privacy)
Answer
August 13 2005 at 1:11 PM (1 hour and 15 minutes and 48 seconds later)
         
REPLIEDCheck Mark
You didn't solve it yourself. I was the one to tell you to flush the system because you put too much oil in. You should be accepting my answer. You never would have found that without the suggestion to flush it.
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
August 13 2005 at 6:26 PM (5 hours and 14 minutes and 41 seconds later)
         
Reply to Hammer Time's Post: HA!!! What some people won't do for $5.00. I had the system apart while you were telling me to add another can of freon. SORRY!!!

Mauri
Customer (name blocked for privacy)
Answer
August 13 2005 at 6:31 PM (5 minutes and 35 seconds later)
         
REPLIEDCheck Mark

Wow, what some people will do to get out of paying $5

Quote:
No, 8oz is too much. You can never get all of the old oil out and with a compressor change and condenser flush, 4-6oz would have been plenty. The rest is still in the system. I don't have the spec in front of me, but I would expect 8oz to be more than a full charge for that car. At this point I would try to flush whatever oil is in the condenser out without adding any more. Too much oil is just as bad as not enough.

Sounds pretty clear to me what the advice was and what the problem turned out to be. Don't worry, there is a record of non payers. We see it every time you post. Good luck on the next question.



Edited by Hammer Time on August 13 2005 at 6:32 PM
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
August 13 2005 at 7:30 PM (58 minutes and 30 seconds later)
         
Reply to Hammer Time's Post: Listen...or is that unheard of. The spec is 8ozs. Look it up. I could go out on a limb and say that's why the can is 8ozs. I had the system wide open and was on my way to inspecting for further obstructions. You were asking what the temp was on a return line that had no pressure???

Mauri
Customer (name blocked for privacy)
Info Request
August 14 2005 at 3:05 AM (7 hours and 34 minutes and 53 seconds later)
         
REPLIED to Info RequestCheck Mark

Your way off here. First, every car uses a different amount of refrigeran oil, second, you didn't get all of the old oil out so putting in 8oz was way overloading it. Don't even waste your time trying to argue this. You'll only look more foolish.

You can try a lot of different excuses to avoid paying and I really don't care if you pay of not now. We will all just avoid you in the future. That's why we track these things

Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
August 14 2005 at 11:41 AM (8 hours and 36 minutes and 33 seconds later)
         
Reply to Hammer Time's Post:

I think your just trying to save your reputation. A four star rating mean alot to an organization like GM. You know you called me an idiot for answering some of the questions without the refference material needed to to justify my claims. you even stole my answer and received the accept because you had the name of the module in the distributor that made you look right. I hope you make your fortune here on this site. Because you ruined my reputation to make yourself or your company look good. I will never come to this site thanks to the you.



Mauri
Customer (name blocked for privacy)
Answer
August 14 2005 at 11:49 AM (8 minutes and 3 seconds later)
         
REPLIEDCheck Mark

The truth comes out. A disgruntled specialist that didn't know what he was talking about. You never should have been able to get specialist status and you won't in the future.

GOOD BYE......................................

Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
August 14 2005 at 12:00 PM (10 minutes and 38 seconds later)
         
Reply to Hammer Time's Post:

I have seen the way you pressure others into accepting your answers as well. It seems a little intimidating. If the solutions worked I'm sure they would have accepted. And for the record...10ozs of oil would still have allowed pressure into the low side. But I willl keep an extra can of freon around in case I loose my flow through the system again. I sure a specialist could figure out the is a need to take it apart, without blowing the system up.

Audios Amigos



Mauri
Customer (name blocked for privacy)
Answer
August 14 2005 at 12:22 PM (21 minutes and 40 seconds later)
         
REPLIEDCheck Mark

Yeah, sure, anything you say.................

Good riddance

PS, you'd better find another trade. You won't make it in this one.

Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
August 19 2005 at 5:19 PM (5 days and 4 hours later)
         
Reply to Hammer Time's Post:

I guess I should say good bye

But remember little burrning embers seem to pop free on the spur of the moment and fill the air with wonder...you never know were I'll pop up next.



Mauri
Customer (name blocked for privacy)
Info Request
August 20 2005 at 1:31 AM (8 hours and 11 minutes and 37 seconds later)
         
Please try. I enjoy crushing your bad advice.
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2718 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
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