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rbbopa71
Novice
Jun 9, 2008, 1:07 PM
Post #1 of 8
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i have a chrysler 1998 voyager and i have just had the gas changed on the air conditining even though it was saying ther was gas in there but it was blowing warm air.You can here the compresser kick in when you turn it on but still blows warm air, they said there are no holes anywhere, so what could the problem be????
(This post was edited by rbbopa71 on Jun 9, 2008, 1:09 PM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 9, 2008, 1:49 PM
Post #2 of 8
(1513 views)
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Re: air conditioning
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?? You don't really just up and change the gas in air conditioner but might evacuate it and recharge it. Who really did what?
Do you have any pressures or other observations. By what method was what saying there was gas/refrigerant in there?
T
Ps on edit - Plymouth Voyager for 1998 takes just 34 or 46 oz of 134a (single and dual system specs respectively)
(This post was edited by Tom Greenleaf on Jun 12, 2008, 11:39 AM)
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rbbopa71
Novice
Jun 9, 2008, 2:15 PM
Post #3 of 8
(1511 views)
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Re: air conditioning
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hi i went to a local dealer and he put a machine on a valve near the engine and it showed that there was the right amount of gas in there, but i was told that it had been two years since being switched on, and the gas may need to be emptied and re-filed but has made no difference
(This post was edited by rbbopa71 on Jun 9, 2008, 2:17 PM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 9, 2008, 9:09 PM
Post #4 of 8
(1496 views)
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Re: air conditioning
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So you know....... refrigerant gasses are stable and don't require changing like you do for engine oil. If not contaminated by someone adding an unknown there is no reason to just change it.
Just hooking up to whatever machine can't tell if the charge by weight is correct. Taking pressure readings do tell of system performance. The suggestion to empty and refill is the only real way to know that the system has the proper charge and THEN if it doesn't perform you can isolate problems by taking pressure and temp readings along with a wide assortment of observations of components operating as they should.
How is it that it hasn't been used in two years? That alone can cause problems as a compressor is oiled by use unless stored in a box on a shelf somewhere........
T
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rbbopa71
Novice
Jun 10, 2008, 7:31 AM
Post #5 of 8
(1492 views)
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Re: air conditioning
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i bought the car 2 years ago and never realy thought about getting it done beacause our summer was so bad, i just dont no what to do but spend lots of money
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 10, 2008, 8:09 AM
Post #6 of 8
(1491 views)
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Re: air conditioning
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I hear you about last Summer - never did get warm for long. Your A/C still would have kicked on if you ever asked for defrost - that happens year round but only when there's at least 45psi in the system - doesn't know whether that's air or what just pressure.
Ok: There are lot of things you can do and test for short bucks. Perhaps even get the Summer out of it.
You need at a bare minimum a gauge that will tap the 12 oz PURE 134a (Freon if you will) with a quick connect hose to low side port. Don't get anything with a can and gauge on it already you want separate stuff and may need to go to a parts store - not just what you'll see at department stores - that stuff can work but can also wipe out all chances of ever fixing some unknown problem if used by clogging it all up. Consider that junk "Fix a Flat" and you don't even know if you have a flat!
$$ Guess investment: Hosetap with gauge $15-20 (this will only fit low side ports)
12oz can of virgin R-134a $7.00 + or -
Just that can get you a lot of info on your own. Don't peirce the new can but you need it as a plug for the can tap so you can just take pressures. You may need it later or it's always worth that much - got it?
T
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rbbopa71
Novice
Jun 12, 2008, 7:15 AM
Post #7 of 8
(1473 views)
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Re: air conditioning
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hi, i have just found out from a air conditioning expert that the pump has gone. What she said was that when she measured the gas once i put the a/c on it went up to 50 and stayed there in stead of going down to 20 as it should do the only way for it to work would be to realy rev it
thanks
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 12, 2008, 11:35 AM
Post #8 of 8
(1471 views)
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Re: air conditioning
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System has been down a while. Just with what you just said I think the expansion valve is stuck and won't give you good readings. Many of those just by luck will snap to and work properly when system is discharged to empty (state of vacuum) and the exact known weight charge is added. See what she thinks about that and how much it would cost,
T
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