Air Conditioning Question
 

I have a Low Pressure guage for what I KNOW to be for R134a.

My question is, are the fittings for 134 and 12 different so that my guage
will not fit any of the pressure ports on a R12 system?

I have a car in the driveway, and my guage fits the Low Pressure side. Since
my guage is for a known R134 system, then the car I'm working on is also
134, right?

Re: Air Conditioning Question
 

Jeff Strickland did pass the time by typing:
> I have a Low Pressure guage for what I KNOW to be for R134a.
>
> My question is, are the fittings for 134 and 12 different so that my guage
> will not fit any of the pressure ports on a R12 system?

Yes, they were designed exactly that way to avoid confusion and mistakes. Since R-12 is not compatible with 134a.

They make adapters for the old hoses, that should give you an idea.
http://www.northerntool.com/webapp/w...ctId=200103774

> I have a car in the driveway, and my guage fits the Low Pressure side. Since
> my guage is for a known R134 system, then the car I'm working on is also
> 134, right?

That would be a good assumption but you should look on the radiator shroud, on the accumulator, or on the compressor for the
refrigerant sticky, just to be certain.

--
DougW

Re: Air Conditioning Question
 

Jeff Strickland did pass the time by typing:
> I have a Low Pressure guage for what I KNOW to be for R134a.
>
> My question is, are the fittings for 134 and 12 different so that my guage
> will not fit any of the pressure ports on a R12 system?

Yes, they were designed exactly that way to avoid confusion and mistakes. Since R-12 is not compatible with 134a.

They make adapters for the old hoses, that should give you an idea.
http://www.northerntool.com/webapp/w...ctId=200103774

> I have a car in the driveway, and my guage fits the Low Pressure side. Since
> my guage is for a known R134 system, then the car I'm working on is also
> 134, right?

That would be a good assumption but you should look on the radiator shroud, on the accumulator, or on the compressor for the
refrigerant sticky, just to be certain.

--
DougW

Re: Air Conditioning Question
 

Jeff Strickland did pass the time by typing:
> I have a Low Pressure guage for what I KNOW to be for R134a.
>
> My question is, are the fittings for 134 and 12 different so that my guage
> will not fit any of the pressure ports on a R12 system?

Yes, they were designed exactly that way to avoid confusion and mistakes. Since R-12 is not compatible with 134a.

They make adapters for the old hoses, that should give you an idea.
http://www.northerntool.com/webapp/w...ctId=200103774

> I have a car in the driveway, and my guage fits the Low Pressure side. Since
> my guage is for a known R134 system, then the car I'm working on is also
> 134, right?

That would be a good assumption but you should look on the radiator shroud, on the accumulator, or on the compressor for the
refrigerant sticky, just to be certain.

--
DougW

Re: Air Conditioning Question
 

"DougW" <post.replies@invalid.address> wrote in message
news:aLFWe.2972$P34.1110@okepread07...
> Jeff Strickland did pass the time by typing:
>> I have a Low Pressure guage for what I KNOW to be for R134a.
>>
>> My question is, are the fittings for 134 and 12 different so that my
>> guage
>> will not fit any of the pressure ports on a R12 system?
>
> Yes, they were designed exactly that way to avoid confusion and mistakes.
> Since R-12 is not compatible with 134a.
>
> They make adapters for the old hoses, that should give you an idea.
> http://www.northerntool.com/webapp/w...ctId=200103774
>
>> I have a car in the driveway, and my guage fits the Low Pressure side.
>> Since
>> my guage is for a known R134 system, then the car I'm working on is also
>> 134, right?
>
> That would be a good assumption but you should look on the radiator
> shroud, on the accumulator, or on the compressor for the refrigerant
> sticky, just to be certain.
>
> --
> DougW
>
Also a 134a gauge is different from an r-12 gauge in pressure readings are
calibrated different and you should never use 134 gauges for 12 and visa
versa due to oil contamination and incompatibility. I have 4 sets r12,
134a, puron 401 and freeze12.

A quick check to see if you are low with out a guage is to measure the
temperature of the liquid line it should be between 50 to 57 degrees.

--
Coasty

Remove the SPOOGE to reply

Re: Air Conditioning Question
 

"DougW" <post.replies@invalid.address> wrote in message
news:aLFWe.2972$P34.1110@okepread07...
> Jeff Strickland did pass the time by typing:
>> I have a Low Pressure guage for what I KNOW to be for R134a.
>>
>> My question is, are the fittings for 134 and 12 different so that my
>> guage
>> will not fit any of the pressure ports on a R12 system?
>
> Yes, they were designed exactly that way to avoid confusion and mistakes.
> Since R-12 is not compatible with 134a.
>
> They make adapters for the old hoses, that should give you an idea.
> http://www.northerntool.com/webapp/w...ctId=200103774
>
>> I have a car in the driveway, and my guage fits the Low Pressure side.
>> Since
>> my guage is for a known R134 system, then the car I'm working on is also
>> 134, right?
>
> That would be a good assumption but you should look on the radiator
> shroud, on the accumulator, or on the compressor for the refrigerant
> sticky, just to be certain.
>
> --
> DougW
>
Also a 134a gauge is different from an r-12 gauge in pressure readings are
calibrated different and you should never use 134 gauges for 12 and visa
versa due to oil contamination and incompatibility. I have 4 sets r12,
134a, puron 401 and freeze12.

A quick check to see if you are low with out a guage is to measure the
temperature of the liquid line it should be between 50 to 57 degrees.

--
Coasty

Remove the SPOOGE to reply

Re: Air Conditioning Question
 

"DougW" <post.replies@invalid.address> wrote in message
news:aLFWe.2972$P34.1110@okepread07...
> Jeff Strickland did pass the time by typing:
>> I have a Low Pressure guage for what I KNOW to be for R134a.
>>
>> My question is, are the fittings for 134 and 12 different so that my
>> guage
>> will not fit any of the pressure ports on a R12 system?
>
> Yes, they were designed exactly that way to avoid confusion and mistakes.
> Since R-12 is not compatible with 134a.
>
> They make adapters for the old hoses, that should give you an idea.
> http://www.northerntool.com/webapp/w...ctId=200103774
>
>> I have a car in the driveway, and my guage fits the Low Pressure side.
>> Since
>> my guage is for a known R134 system, then the car I'm working on is also
>> 134, right?
>
> That would be a good assumption but you should look on the radiator
> shroud, on the accumulator, or on the compressor for the refrigerant
> sticky, just to be certain.
>
> --
> DougW
>
Also a 134a gauge is different from an r-12 gauge in pressure readings are
calibrated different and you should never use 134 gauges for 12 and visa
versa due to oil contamination and incompatibility. I have 4 sets r12,
134a, puron 401 and freeze12.

A quick check to see if you are low with out a guage is to measure the
temperature of the liquid line it should be between 50 to 57 degrees.

--
Coasty

Remove the SPOOGE to reply

Re: Air Conditioning Question
 

Coasty did pass the time by typing:

> Also a 134a gauge is different from an r-12 gauge in pressure readings are
> calibrated different and you should never use 134 gauges for 12 and visa
> versa due to oil contamination and incompatibility. I have 4 sets r12,
> 134a, puron 401 and freeze12.

little topic drift, but the low side R-12 gauge with long hose makes
a dandy fuel pressure gauge for diagnosis. Just ductape the sucker
to the window, screw it onto the rail, and drive.

--
DougW

Re: Air Conditioning Question
 

Coasty did pass the time by typing:

> Also a 134a gauge is different from an r-12 gauge in pressure readings are
> calibrated different and you should never use 134 gauges for 12 and visa
> versa due to oil contamination and incompatibility. I have 4 sets r12,
> 134a, puron 401 and freeze12.

little topic drift, but the low side R-12 gauge with long hose makes
a dandy fuel pressure gauge for diagnosis. Just ductape the sucker
to the window, screw it onto the rail, and drive.

--
DougW

Re: Air Conditioning Question
 

Coasty did pass the time by typing:

> Also a 134a gauge is different from an r-12 gauge in pressure readings are
> calibrated different and you should never use 134 gauges for 12 and visa
> versa due to oil contamination and incompatibility. I have 4 sets r12,
> 134a, puron 401 and freeze12.

little topic drift, but the low side R-12 gauge with long hose makes
a dandy fuel pressure gauge for diagnosis. Just ductape the sucker
to the window, screw it onto the rail, and drive.

--
DougW