# Where should my fan setting be for a/c recharge **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [August 22, 2008, 2:55pm UTC](https://community.cartalk.com/t/where-should-my-fan-setting-be-for-a-c-recharge/18516 "2008-08-22T14:55:29Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Jeffmw05](https://avatars.discourse-cdn.com/v4/letter/j/74df32/32.png) [@Jeffmw05](https://community.cartalk.com/u/Jeffmw05)\ **Post date:** [August 22, 2008, 2:55pm UTC](https://community.cartalk.com/t/where-should-my-fan-setting-be-for-a-c-recharge/18516/1 "2008-08-22T14:55:29Z")
Does it matter if my fan setting is on “high” or “low” when I fill up my car’s A/C ? The literature typically says “Max A/C” but never specifies fan settings. ---
**Author:** ![SteveF](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/stevef/32/2_2.png) [@SteveF](https://community.cartalk.com/u/SteveF)\ **Post date:** [August 22, 2008, 3:01pm UTC](https://community.cartalk.com/t/where-should-my-fan-setting-be-for-a-c-recharge/18516/2 "2008-08-22T15:01:37Z")
Off. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [August 22, 2008, 3:07pm UTC](https://community.cartalk.com/t/where-should-my-fan-setting-be-for-a-c-recharge/18516/3 "2008-08-22T15:07:49Z")
You want the fan speed on high when recharging the A/C system. This allows you to measure the vent temperatures as the A/C is being recharged. Tester ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [August 22, 2008, 3:11pm UTC](https://community.cartalk.com/t/where-should-my-fan-setting-be-for-a-c-recharge/18516/4 "2008-08-22T15:11:18Z")
“Max A/C” always means with the fan set to high. Most cars default to high fan if they have a “Max A/C” button or setting. ---
**Author:** ![Jeffmw05](https://avatars.discourse-cdn.com/v4/letter/j/74df32/32.png) [@Jeffmw05](https://community.cartalk.com/u/Jeffmw05)\ **Post date:** [August 22, 2008, 4:43pm UTC](https://community.cartalk.com/t/where-should-my-fan-setting-be-for-a-c-recharge/18516/5 "2008-08-22T16:43:39Z")
Off ? You must be drunk. ---
**Author:** ![Jeffmw05](https://avatars.discourse-cdn.com/v4/letter/j/74df32/32.png) [@Jeffmw05](https://community.cartalk.com/u/Jeffmw05)\ **Post date:** [August 22, 2008, 4:44pm UTC](https://community.cartalk.com/t/where-should-my-fan-setting-be-for-a-c-recharge/18516/6 "2008-08-22T16:44:12Z")
Thanks! Very helpful. ---
**Author:** ![transman618](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/transman618/32/24_2.png) [@transman618](https://community.cartalk.com/u/transman618)\ **Post date:** [August 23, 2008, 12:04am UTC](https://community.cartalk.com/t/where-should-my-fan-setting-be-for-a-c-recharge/18516/7 "2008-08-23T00:04:35Z")
Not only do you want your evaporator fan settings on high, you also want to make sure the condenser (Radiator) fans are operating. Refrigerant constantly changes properties from a gas to a liquid as it circulates through the system which affect the high and low side pressures. When charging any refrigeration system, whether it be automotive, home A/C, or commercial refrigeration units, the compressor is on, and the condenser and evaporator fans are on. transman ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [August 23, 2008, 2:30am UTC](https://community.cartalk.com/t/where-should-my-fan-setting-be-for-a-c-recharge/18516/8 "2008-08-23T02:30:44Z")
As long as the compressor is running and so are the condensor fans are also running it makes no difference.Charge by weight,observe pressure reading,steady,not to high,not to low.If you do want to measure outlet temp GM does recommend center outlet car in shade 2000rpm blower on high.For me the key to no come-backs was charging the correct amount of refridgerant.In any technical schooling I have had GM Dealer Training,Community College courses,ASE Certs. it was never asked and my practical experience showed it did not matter.