How to fix baseboard heat (gas heat furnace) making GURGLING NOISE?

[Chicity]

You can hear the noise in this video

youtube DOT com/watch?v=NiFe92DUY7Q

I've just bought the house so this is the first time i turn on the heat. Before that, I changed the thermostat to a HoneyWell Digital one. There was only 1 Red wire but there was no metal jumper connecting R and RC slot (does it have anything to do with this noise?). The heat comes out, everything works but the annoying noise is there. How do I fix this?

Thank you
p/s: i can't post link, please replace DOT with a .

[Chicity]

and the noise never stops as long as the heat is on.

[brownie]

Sounds like you need to bleed the air out of your system.

[Brian_Martin_Parma_Air]

If it's a High Efficiency Furnace - This could be the cause

it's the water in the inducer motor due to improper ventillation. pull the motor, drain it. howver, this will happen again until you ventilaate properl;y.