AC quit - ZR-1 Net Registry Forums

Subfixer · 05-22-2021

AC worked great all last year.
This year, nothing.
I have no error codes on the HVAC head unit. All fuses OK.
Watched the Tech 1 display and I have no AC request unless I ground ckt 762, then the compressor runs.
With the system not running, I have about 15 psi at the low side fitting.
When the compressor runs, I have 0 psi at the low side.

Pretty sure most of the freon is gone. Looks like there is a leak inside the pressure sensor where the harness plugs in (looks like some green dye in there). On the hunt for one of those (system is a complete '95 134a system in my '92).

I don't want to have the system refilled only to find out another sensor is bad. More troubleshooting tomorrow.

05-22-2021	#1
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 384	AC quit AC worked great all last year. This year, nothing. I have no error codes on the HVAC head unit. All fuses OK. Watched the Tech 1 display and I have no AC request unless I ground ckt 762, then the compressor runs. With the system not running, I have about 15 psi at the low side fitting. When the compressor runs, I have 0 psi at the low side. Pretty sure most of the freon is gone. Looks like there is a leak inside the pressure sensor where the harness plugs in (looks like some green dye in there). On the hunt for one of those (system is a complete '95 134a system in my '92). I don't want to have the system refilled only to find out another sensor is bad. More troubleshooting tomorrow. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige