Wiktionary(0.00 / 0 votes)Rate this definition: 1  smudge(Noun) A blemish; a smear. 2  smudge(Noun) Dense smoke, such as that used for fumigation. 3  smudge(Verb) To obscure by blurring; to smear. 4  smudge(Verb) To soil or smear with dirt. 5  smudge.
This smell might mean that your coolant is leaking from somewhere like a radiator or heater hose. This kind of a problem means it's a good idea to take your car into a professional. If you smell maple syrup outside the car, this might mean that you have a leaking radiator cap or that the radiator itself has a leak.
The heater functions with the help of a healthy cooling system and the heater controls inside the passenger compartment. Depending on the symptoms, there are various reasons why your heater might not be working. Engine temperature gauge is normal, but I have no heat! First, check your engineâs coolant level. If the coolant level is low, air may become trapped in the heater core. Smooth coolant flow through the heater core is critical for heat output. While the vehicle is running, heat produced by the engine is absorbed by the engineâs coolant and flows through the heater core. The heater core is a little radiator usually located behind the dashboard in the passenger compartmentâit is the heat source for your vehicleâs climate control system.