Where is the heater core on a Volvo 940?

The heater core in a Volvo 940 is located behind the dashboard on the passenger side of the vehicle. To access it, you will need to remove the center console and passenger's seat. Once you remove these parts, you will see the heater core housing, which is held in place by four screws. Remove the screws and then you will be able to access the heater core.