A leaking heater core produces a sweet odor and a slimy film on the windows ... but not as strong. Leave it to your mechanic to repair if no suction is present. You can replace a heater control valve ...

because the core is located inside the vehicle’s dashboard. Relatively inexpensive, heater hoses should be kept in good condition to prevent leaks or ruptures that would jeopardize engine cooling.

because the core is located inside the vehicle’s dashboard. Relatively inexpensive, heater hoses should be kept in good condition to prevent leaks or ruptures that would jeopardize engine cooling.