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910 Freeport Parkway, Suite 100 Coppell, TX 75019
+ (877) 342-5526

Model Specific Air Conditioning
1930's to 1980's Cars & Trucks
Since 1977

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R134a Refrigerant Tag

Charging Your Retrofit Air Conditioning System: 3 Important Safety Tips

Note: Charging procedures for the Perfect Fit retrofit air-conditioning systems by Classic Auto Air are different than most modern air-conditioning systems. Please read and follow all procedures and safety precautions carefully.

So you’ve bought and installed your new Classic Auto Air Perfect Fit air-conditioning system and now need to get the system charged. Our first tip is to find a qualified technician that will charge your new retrofit A/C system. We have created a checklist that can be used at a charging station, or for hand charging. But it’s important to note that the charging procedures for this system are different than most modern AC systems.  A qualified technician will avoid damaging your new AC system.

Determining the Correct Type and Size of Condenser

This inquiry from a Mustang owner reflects the challenge of constructing an A/C unit with parts from a variety of sources, and of finding parts that need to work with both original and non-original components.

I’m trying to sort out the components for an add-on A/C unit in a 64 F-100. I have a few early Mustang units so that’s what I’m using inside. I will mount a Unicla UP170 compressor low on the passenger side of the engine. I need to determine the proper size condenser for this given that I’ll be using 134a instead of the original R12. I have a 27″ x 16″ opening in the core support, and a non-original crossflow radiator that doesn’t mount like the OEM 64 F-100 unit did. I’d appreciate any input.

1965 Mustang AC: Converting From R12 to R134a Refrigerant

Recently the owner of a ’65 Mustang asked us how to convert his car’s original compressor to use R134a refrigerant (also known as 134a). Production of R12 Freon was discontinued in 1995 due to concerns about R12’s damaging effects on the ozone layer. The more environmentally friendly R134a has been used in most models since then. Assuming the compressor is in good shape, the owner of this 1965 Mustang can convert from R12 to R134a. Here are the steps to take to make sure the converted AC system gets nice and cold.

R-12 or 134a: Know the Refrigerant Contents of Your Classic Car’s AC System

We sometimes receive questions from owners wondering what type of refrigerant is in their air conditioning system.  Cars manufactured prior to 1995 originally came with R-12 Freon, a refrigerant that was discontinued due potential ozone damage.  Cars manufactured after 95, and older systems requiring re-charging contain a more ozone friendly refrigerant known as 134a.  Questions about system refrigerants arise when it isn’t clear if the ac system has ever been recharged.  The following customer e-mail is case in point:

Recharging AC Compressors with R134a Refrigerant

We recently received an e-mail from the proud owner of a 1963 Cadillac, with installed, under dash air conditioning manufactured by Classic Auto Air.  The compressor is disconnected, and the owner is curious about how much R134a is needed to re-charge the system.  Instruction manuals are included with each Classic Auto Air system shipped, but we get this question frequently enough so we are answering it here in our Tech Talk section.