A/C problem

2003 PONTIAC MONTANA
76,000 MILES • 3.4L • 6 CYL • 2WD • AUTOMATIC
Avatar
XJSHEN
  • MEMBER
  • 251 POSTS
My van, A/C cooling works great under weather temperature below 77 F showing near 40 F on the A/C meter;
But when weather temperature is over 80 F A/C the A/C cooling only around 60 F;
and if weather temperature is above 90 F, then A/C cooling only above 70 F.

What is possible problem on the A/C system? And how to fix it?
Thanks for your help!
Jun 18, 2018 at 3:11 AM
Advertisement
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good afternoon.

Do you have a set of gauges to monitor the pressures? It is possible that it is low in Freon or there may be moisture in the system as well. Gauge readings would help us determine the root cause of failure. If you do not have a set you can rent a set at a parts store or buy a set at Harbor Freight.

Roy
Jun 18, 2018 at 9:50 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle