My car seems to be "gurgling" on start-up coming from dashboard/heat/air area.

What is your question?

It happens most days, and doesn't "gurgle" for my entire ride. Ie, it will stop after a period of time and 'not always'. I haven't noticed it more/less based on temperature (ie happens more on HOT days or COLD days), and also-I can fiddle with turning on the heat/air/defrost and it will go away but it's not "ONE" thing that makes it stop. Is it a bubble in the compressor, is it going to get worse over a cold Chicago winter, will it make my heat stop working? Is it something mechanical, something dangerous or a quick/easy/cheap fix?