Posted on 4/25/2025
Hearing a gurgling sound behind your dashboard isn’t just unsettling—it’s a sign that something may not be flowing quite right inside your vehicle. This odd noise often gets mistaken for a one-time fluke, but if it keeps happening, it usually points to a coolant or air flow issue within your car’s heating or cooling system. So what’s really causing that bubbling or sloshing noise from behind the dash? Let’s walk through the most common reasons and what they mean for your car. Air Trapped in the Cooling System One of the leading causes of a gurgling sound behind the dash is air bubbles moving through the heater core, which is a small radiator-like part that delivers heat into your cabin. Air pockets in the cooling system can get trapped here, especially after a coolant flush, a recent repair, or a slow leak. When coolant flows through the heater core, trapped air creates a bubbling or gurgling effect. While the noise may not alway ... read more