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Message: <blockquote data-quote="GearOSv2" data-source="post: 445950" data-attributes="member: 17284">My E36 heater core was removed and the mechanic just put spark plug to block the hose and clamps to secure it (done before I own the E36). For the longest time, I was thinking wht on earth is that... haha...That said, 2 skool of tot:1) change the heater core so that you enjoy dual climate and air con temperature control.2) delete the core and u fix your temp to a setting (a norm practice I believe if you delete the core since the a/c takes reading from the heater core) -- not sure who can confirm this, this is wht I was toldOr... you can do alot of hack job to make a/c works like a a/c without the core. (still trying to learn this from friend, according to him with the a/c working properly, it will improve FC since a/c is not activated all the time, only when it's not cold)</blockquote>