Sean J Blackburn
Senior Member
Quick question regarding ac gages. I've used my set quite a few times over the years (have to recharge about once a year) with no issues. Today I went to recharge my ac and had a weird issue with my low side gage. Ambient temp was 100, low side read 40 and as I added r134a, the high side went up as expected but the low side wouldn't move.
My temperature pressure chart shows low should be 50-55 and high should be 315-325 at 100 degrees. Well, high side reached 325 no problem but the low side never moved off the initial 40psi.
If I kept filling to about 350 on the high side the low side would suddenly spike up to about 65 psi.
I'm thinking my gages have taken a dump on me, anyone have any thoughts about what is going on here before I buy new gages?
My temperature pressure chart shows low should be 50-55 and high should be 315-325 at 100 degrees. Well, high side reached 325 no problem but the low side never moved off the initial 40psi.
If I kept filling to about 350 on the high side the low side would suddenly spike up to about 65 psi.
I'm thinking my gages have taken a dump on me, anyone have any thoughts about what is going on here before I buy new gages?