Charging A/C 94 D90 - Defender Source
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Old June 6th, 2016, 02:57 PM
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Charging A/C 94 D90

Had a few questions on charging my A/C in the D90. Never used the A/C, but all the components are there, blows warm air when turned on. Compressor seems to initiate, so hopefully no issues with that. Factory fitted A/C...figured it was worth a shot to recharge if that's all I need.

Is the refrigerant r134 or r12 fitting?
Any recommendations on brand to buy? I assume can with gauge from auto parts store...

Any other advice? Seems pretty straight forward just locating the L port and following instructions on can.

Thanks in advance
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  #2  
Old June 6th, 2016, 03:08 PM
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David Frank
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It's 134. 1993 was the break year in the us. Piece of cake. They are all pretty good. I use subzero (it's synthetic) with the sealer. I get the big can at the truck stops with the gauge. The gauge is reusable, but I lose them. I've done all my vehicles with it.

You can hear the ac compressor engage? That's a good sign. I've had mine so low that it took a bit of coolant just to get it to kick over. Just remember to measure when the compressor is engaged, as they don't run constantly and periodically just kick in and out.
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Old June 6th, 2016, 07:48 PM
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Quote:
Originally Posted by D90Overkill View Post
It's 134. 1993 was the break year in the us. Piece of cake. They are all pretty good. I use subzero (it's synthetic) with the sealer. I get the big can at the truck stops with the gauge. The gauge is reusable, but I lose them. I've done all my vehicles with it. You can hear the ac compressor engage? That's a good sign. I've had mine so low that it took a bit of coolant just to get it to kick over. Just remember to measure when the compressor is engaged, as they don't run constantly and periodically just kick in and out.
Thanks for the info. Which is the Low port connector? The upper or lower connection?
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Old June 6th, 2016, 08:05 PM
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David Frank
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They should be different sizes so it's pretty foolproof. Only the low port will fit the recharge can's hose fitting.
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Old June 6th, 2016, 09:06 PM
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Search for one of my posts, it is explained there. I applied 12v to the compressor so it would pump while filling.
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Old June 6th, 2016, 11:27 PM
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David Frank
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Here's some good reference material.

http://www.defendersource.com/forum/...ice-55536.html
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  #7  
Old June 22nd, 2016, 09:49 AM
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Drew Rogers
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Is it r134 in a 93nas110?
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Old June 22nd, 2016, 10:17 AM
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Honestly those cans with the gauge are pretty much useless. You really need the full gauge set with connectors to the high side and low side. Low side pressure is linked to ambient air temp.
If you go to Joe's Garage they will do it properly and it's not expensive. If the compressor is coming on that's a good sign cz it means there's enough refrigerant in the system to operate the low pressure safety switch.
Also need to open the low side valve halfway when pumping up the system.
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  #9  
Old June 26th, 2016, 01:36 PM
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Finally got around to charging this and it was a breeze. Bought a can of AC Pro with gauge, system took the whole can, but is now in green zone and ice cold. Compressor running as it should. So glad I have AC option. If it leaks out, I'll buy another can next summer.
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