Your 1991 Volvo 940 wagon is leaking antifreeze into the drivers side floor how do you tell if it is just a hose or the heater core you still get hot air?

To determine if the leak is from a hose or the heater core, start by inspecting the hoses connected to the heater core for any visible signs of damage or leaks. Check for wetness around the hoses and connections. If the hoses appear fine and you still get hot air, it may indicate that the heater core is leaking, as it could still function while allowing coolant to escape into the cabin. Additionally, look for any signs of coolant pooling on the driver's side floor or a sweet smell in the cabin, which would further suggest a heater core issue.