A/C gauge readings
 

I thumbed through the Service Manual but didnt see what i was looking for.

What should the high & low side gauges read when the system is fully charged?

this is for a 1992 with a R12 system that is all original.

many thanks!

Re: A/C gauge readings
 

What is the Ambient Temperature outside? Humidity?

This should help
http://i6.photobucket.com/albums/y22...ka454/ac-1.jpg

Re: A/C gauge readings
 

Keep in mind that your pressure is actually going to be a little higher than what the PT chart says unless you have a big box fan moving air across your condenser.

Re: A/C gauge readings
 

Thank you everyone and don't know how i missed that chart.

Temps tend to be high 70's/low 80's, humidity around 45-50%. will make note of higher temps without a fan blowing across the condenser.

as always this group is top notch and extremely helpful.

big thanks to all.

Re: A/C gauge readings
 

Also looking at the PT chart you can see why R134a will put a bigger drag on the motor than R12

Re: A/C gauge readings
 

Excellent Information Jeff....thanks :thumbsup: