sounds like an aquarium under the dash?
 

Sounds like water bubbling under the dash. Floorboardsare dry any ideas?

RE: sounds like an aquarium under the dash?
 

either your heater core is clogged or you have air trapped in the system. pull of both heater core hoses and flush with water. then make sure that your coolant level is full

RE: sounds like an aquarium under the dash?
 

I'll take door #2 and guess it's air in the system.