Sorry for not replying earlier today. I wrote something up, but it didn't go due to a p.c. glitch. This is a good next step.
If they did not remove the EPR valve from the back of
the compressor (it slides right out), that may be
restricting the R-134 refrigerant flow enough to cause
inadequate cooling.
Removing the EPR valve makes the evaporator temps so
cold it requires a thermostatic cutoff switch on the
clutch to prevent icing up. Trust me, ice cold air is
the result if all else is well with the system.
Note: I assume the high side and low side pressures
are in spec? Unless the low side is 25 lbs or less,
not much cooling will happen. Unless the high side
has enough pressure - 180-230lbs, not much cooling
will happen. On the other hand, too much high side
pressure and there is a blockage. Too little and the
compressor is likely defective.
I assume the shop is working with a 1964 shop manual?
Good luck,
Chris H.
66 LeBaron (ice cold on R-134)
--- Lupe Rodriguez <lupee@xxxxxxx> wrote:
> Yes Paul, it is a '64. We disconnected the heater
> hoses because we suspected that also. It has been
> converted from R12 to R134 and back twice. It is now
> on R134. Could the condenser be half plugged up? I
> have spent a ton of money on this and now the A/C
> guys don't even charge me to work on it.
> Lupe Rodriguez,
> 64 Crown Coupe
> ----- Original Message -----
> From: randalpark@xxxxxxx
> To: mailing-list@xxxxxxxxxxxxxxxx
> Sent: Tuesday, May 30, 2006 6:55 PM
> Subject: Re: IML: AC on any old Imperial
>
>
> I don't think that the evaporator gets plugged up,
> but to find out for sure, you need to take it to a
> different shop. That A/C should get cold enough to
> freeze you out of the car. Are you sure that the
> heater valve is fully closed? Sometimes the cable
> that controls the flow of hot water to the heater
> gets out of adjustment, and the heater valve doesn't
> fully close. It was a '64, right?
>
> Paul W.
>
> -----Original Message-----
> From: Lupe Rodriguez <lupee@xxxxxxx>
> To: mailing-list@xxxxxxxxxxxxxxxx
> Sent: Tue, 30 May 2006 17:37:14 -0700
> Subject: Re: IML: AC on any old Imperial
>
>
> Paul,
> I must have missed your original post. The
> expansion valve and the receiver dryer were
> replaced. I have a feeling that the evaporator at
> the dash is half plugged up. Is that a possibility?
> I am not an A/C man.
> Thanks,
> Lupe,
> 64 Crown coupe
> ----- Original Message -----
> From: randalpark@xxxxxxx
> To: mailing-list@xxxxxxxxxxxxxxxx
> Sent: Monday, May 29, 2006 4:53 PM
> Subject: Fwd: IML: AC on any old Imperial
>
>
> Okay Lupe, this was posted the same day.
>
> Paul W.
>
> -----Original Message-----
> From: RandalPark
> To: mailing-list@xxxxxxxxxxxxxxxx
> Sent: Sat, 20 May 2006 18:01:40 -0400
> Subject: Re: IML: AC on any old Imperial
>
>
> It should do much better than that. Who are all
> the A/C technicians that you wrote about? If they
> are all in the same shop you should take it
> someplace else. A good A/C shop would figure out
> what is wrong and correct the problem. There are
> many other parts that might need to be replaced,
> such as the expansion valve, condensor, or the
> receiver dryer. If the system is fully charged and
> everything else is working as it should, the
> expansion valve can keep it from making cold air in
> the passenger's compartment. If the lines are cold
> up to it, and not after it, that could be your
> problem. There are more sophisticated tests, but
> that would at least give you a clue.
>
> Paul W.
>
> -----Original Message-----
> From: Lupe Rodriguez <lupee@xxxxxxx>
> To: mailing-list@xxxxxxxxxxxxxxxx
> Sent: Sat, 20 May 2006 13:43:30 -0700
> Subject: Re: IML: AC on any old Imperial
>
>
> I have a 64 Imperial and had a new compressor
> installed. (the old one froze up from lack of oil.)
> Why is it that all the A/C technicians can only get
> it to put out 50 degrees at the vents?
> Lupe,
> 54 Crown Coupe
> 60 Thunderbird, no AC
> ----- Original Message -----
> From: alan1416@xxxxxxx
> To: mailing-list@xxxxxxxxxxxxxxxx
> Sent: Sunday, May 14, 2006 8:39 AM
> Subject: Re: IML: AC on any old Imperial
>
>
> LOL I knew this was going to be fun when i
> first saw the post. so here is my back yard wrench
> turner take. I have two 75 LeBarons a 4 door and a
> coupe. the 4door I change to 134 used rings and a
> new dryer and one hose, it puts out 38 deg at the
> vents. the Coupe is still R12 and I had it checked
> and serviced by Chrysler. It put out 36 deg at the
> vent. Now I live in coastal NC, It don't get much
> more humid and HOT that here. I can tell no
> difference in the two cars cooling, both will
> freeezzze you out.
>
> --
> Alan Jordan
> 90 IMP
> 75 LeBaron X 2
>
>
> -------------- Original message from Elijah
> Scott <imperial1971@xxxxxxxxx>: --------------
>
> randalpark@xxxxxxx wrote:
> Converting to R-134A or sticking with R-12
> is a choice that one has to make. Here in Seattle,
> R-12 is about $200.00 per pound and MUST be
> installed by a professional. R-134A runs about
> $12.00 per pound, and can be installed at home, with
> the right tools and by following the directions.
> I agree with Paul. I converted my '71
> Imperial to R-134 in 1999. I still get between 36
> and 40 degrees of cool air out of the dash vents,
> which is as good as you can ask for, especially here
> in the hot, humid South.
>
> There's a sloooooow leak in the system on
> this car, so I usually have to add 1 or 2 cans of
> R-134 per year. I buy it for about $2.50 a can at
> Sam's, so a $5 per year "maintenance fee" to have
> cold A/C is absolutely worth it to me. :o)
>
> The conversion, by the way, consisted of a
> $35 kit I got at K-Mart. I vacuumed the system to
> remove any residual R-12 and moisture. I then
> installed the two v alve adapters, the oil charge
> that came with the kit, and then a full charge of
> R-134.
>
> And I got COLD A/C for not much money.
>
> The car still has the original compressor
> and all of the original hoses. I'm going into year
> 7 of R-134, and my total cost for the conversion is
> less than $100, including any R-134 I've added over
> the years.
>
> So far, so good. LOL!
>
> Elijah
>
>
>
> Imperial Power Window Switch Repair
>
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