# 1998 Ford Ranger -diagnosing AC problem **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** ford, ranger\ **Created:** [August 12, 2018, 2:12am UTC](https://community.cartalk.com/t/1998-ford-ranger-diagnosing-ac-problem/122755 "2018-08-12T02:12:57Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![samuel.snow](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/samuel.snow/32/12976_2.png) [@samuel.snow](https://community.cartalk.com/u/samuel.snow)\ **Post date:** [August 12, 2018, 2:12am UTC](https://community.cartalk.com/t/1998-ford-ranger-diagnosing-ac-problem/122755/1 "2018-08-12T02:12:57Z")
The refrigerant was recently replaced on the truck because I got tired of enduring summer days in Texas with the a/c not working. However, since it was replaced, the a/c hasn’t been working consistently. Usually, when it’s really hot or I’ve been driving for more than 30 minutes, it goes from working to pumping out hot air. I took it to the same shop that replaced the refrigerant on a cooler day, and the a/c happened to be working. The main mechanic said they couldn’t fix the a/c unless it stopped working. So, my questions are these: 1 What’s wrong with the a/c? and 2. How do I fix it? ---
**Author:** ![Rainflurry](https://avatars.discourse-cdn.com/v4/letter/r/cab0a1/32.png) [@Rainflurry](https://community.cartalk.com/u/Rainflurry)\ **Post date:** [August 12, 2018, 4:36am UTC](https://community.cartalk.com/t/1998-ford-ranger-diagnosing-ac-problem/122755/2 "2018-08-12T04:36:49Z")
From what you described, it’s possible that the A/C system was overfilled and has too much pressure in it. When the high side pressure gets too high (which can be caused by high ambient temps), it shuts down the A/C compressor and you lose cold air. You need to have the system checked on a hot day I’m afraid. If it’s overfilled, it’s an easy fix. Hope that’s it.