# If I don't use AC, will there be no AC maintenance? **URL:** \ **Category:** General Discussion\ **Created:** [April 11, 2015, 6:48pm UTC](https://community.cartalk.com/t/if-i-dont-use-ac-will-there-be-no-ac-maintenance/89628 "2015-04-11T18:48:12Z")\ **Posts on this page:** 1\ **Showing post:** 47
**Author:** ![davesmopar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/davesmopar/32/41750_2.png) [@davesmopar](https://community.cartalk.com/u/davesmopar)\ **Post date:** [October 31, 2025, 2:24pm UTC](https://community.cartalk.com/t/if-i-dont-use-ac-will-there-be-no-ac-maintenance/89628/47 "2025-10-31T14:24:28Z")
Nice little read, but you have to read past just the one post… lol > [@Defroster runs AC](https://community.cartalk.com/t/defroster-runs-ac/98909/3): > > All cars run the AC compressor when the defroster is on. It’s not counterproductive. The AC removes moisture from the incoming air in order to keep the windows clear from fogging up. There are temps where the AC won’t run, the pressure switches and sensors will take care of that and turn off the compressor if the system is in danger of icing up. Yes as a rule of thumb, or **most** (key word most) of the automotive vehicles run the A/C while in def mode partly to keep everything lubricated during the off A/C seasons, while the other reason is to dehumidify the air, as blowing dry, warm air onto the cold windshield clears condensation/fog much faster and more effectively than just warm humid air… and yes for safety reasons, some/most/all use pressure switches to keep from damaging the A/C below x temps… This is NOT a blanket statement as there are exceptions to every rule… And since we are mostly in the US market, I am not talking about the rest of the world, not their, don’t care what they do in their market… and I really don’t care if I used their/there correctly, this is car talk, not an English course forum… lol --- _[View the full topic](https://community.cartalk.com/t/if-i-dont-use-ac-will-there-be-no-ac-maintenance/89628)._