If you have an issue with your antifreeze, you don't need to touch anything with the air conditioner.

Being low on coolant will cause bubbling noises until you fill and bleed the system. If your antifreeze is disappearing, then you have a gasket problem.

 

the gurgling noise your probably hearing is usually from the coolant system. when my intake gaskets were bad, my car would "gurgle" because its getting too much air in the system, and then after too much air got in there it would overheat. bleed your coolant system and top off the rad. if you drive it for a bit and your problem persists, then have your intake gaskets checked into.

 

Then look for the 90 degree elbow out of the firewall the hose is attached to that.

Are you losing coolant on a regular basis? If so.... Pop the oil fill cap off and look to see if it has some residual milk shake looking gunk....
If so...
Then you have a bad upper/lower intake gaskets...
They will be need to be replaced... Or you will definitely blow up the motor... Do you smell antifreeze in and or around the vehicle? That's a sure sign of a leak... It could also be those pesky elbows attached to the pully tensioner...there usually the first to go...

I would recommend..
Pressure testing the cooling system... from there that should point to the leak... and confirm its something more serious like the elbows or the upper/lower intake gaskets.

 

or check the rad cap....this was where my milky gunk was. my oil was fine. it all depends where the gaskets blow to as what fluid is effected