Engine overcools blows cold air with heater on and leaks?

If your engine is overcooling and blowing cold air through the heater while also leaking fluid, it may indicate a problem with the thermostat, which could be stuck open, preventing the engine from reaching its optimal operating temperature. Additionally, the leak could be from a coolant hose or a gasket, leading to a loss of coolant and further contributing to the cooling issue. It's advisable to check for coolant levels and inspect for leaks, as continuing to drive the vehicle in this condition can cause further engine damage. Seeking a mechanic's assistance for a thorough diagnosis and repair is recommended.