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hvac gauges


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7 replies to this topic

#1 vunger1

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Posted 27 June 2012 - 05:11 PM

can i use automotive hvac guages too work on sealed system of a refrigerator. Are the hoses on the automotive hoses compatible with shrader valves, saddle valves, etc.....?

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#2 jumptrout

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Posted 27 June 2012 - 07:33 PM

Depends if the gauges are for the old R12 refrigerant or the R134a refrigerant.
R12 gauges will hook up.
134a will not.

#3 vunger1

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Posted 28 June 2012 - 09:02 AM

i have a new set and they screwed right onto the temp. saddle valve.Is there somethng else i need to look at?

#4 vunger1

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Posted 28 June 2012 - 09:11 AM

Here is a link to a set like mine.http://atdtools.com/3688

#5 certified tech group 51

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Posted 28 June 2012 - 09:44 AM

You have a temporary tap on a sealed system......Are you removing the refrigerant??? Or, repairing the system???

#6 vunger1

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Posted 28 June 2012 - 08:59 PM

No i just had a temporary valve and i tried that on these gauges and it fit , wouldnt the permenant fittings be the same threads as the saddle valve type fitting?.

Edited by vunger1, 28 June 2012 - 09:00 PM.


#7 certified tech group 51

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Posted 29 June 2012 - 09:33 AM

Threads are the same except for the old R-12......I hate it when you go out on a service call for not cooling ....You check the evaporator coils and see no frost pattern.......Upon spinning the refer around, you see a 'Bullet tap' on the system........The customer sez ( in a bid to save money ) " I had Bob's Used Auto Sales and Used Appliance" guy fix it " Now , ya gotta tell the customer how much it will cost to fix it correctly............. P.S................I use a ' four way ' set of gauges, ( promo pitch, Yellow Jacket.....10 years of service and a high side gauge just broke) ................. 1) high side................. 2) low side.........3) vacuum pump and 4) hook-up a refrigerant tank for a sweep charge or a vacuum gauge.......or........................ P.P.S.....use low loss fittings, less chance of non- condensables from entering the system.... .

Edited by certified tech group 51, 29 June 2012 - 09:36 AM.


#8 jb8103

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Posted 30 June 2012 - 06:10 AM

Wait a sec.

Automotive service valves for 134a are going to be either quick-connect or Acme thread. The ad said something about "manual couplers"? What, adapters or something that you aren't using for this job?
First, do no harm.




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