Possible heater coil.
Thermal energy is removed from the inside of a fridge by the coolant circulating through the system. The coolant absorbs heat as it evaporates in the evaporator coils inside the fridge, cooling the air inside. The heat absorbed by the coolant is then released outside the fridge through the condenser coils, completing the refrigeration cycle.
heat It transfers engine heat from the coolant to the air inside the car.
You are probably low on coolant. You need coolant to heat the cabin and cool the engine. Add more coolant and take your vehicle to a shop to find/fix the leak.
The heater core is leaking coolant.
Drive it high speed two miles to get it up to operating heat. Stop and raise the hood and look for the leak. Have a flashlight too. When the vehicle stops the engine will super heat the water and the leak will show itself. Be carefull - it can be violent. If the interior smells sweet you may have a leak in the heater core. LoL
Transferrs heat from the engine to the radiator the to the air it also transferrs heat to the heater core for warm air inside the vehicle
Conduction. The heat from the engine block transfers to the coolant inside the galleries by means of conduction. The coolant then has to be moved, to stop it boiling. In early simple engines, this movement was by Convection. In modern engines it is pumped.
If it smells sweet ,it is coolant, and the heater core has failed. If it smells electrical you have a wiring problem and need to remove whatever is necessary to find cause.
The water pump moves the coolant around the system so the heat can be transferred inside.
The engine's thermostat controls the engine coolant temperature. The temperature control inside for the heater controls the cabin heat.
As the coolant flows through the refrigerator, its thermal energy decreases as it absorbs heat from the interior of the fridge. This heat absorption occurs in the evaporator coil, where the coolant evaporates and transitions from a liquid to a gas. Subsequently, the gaseous coolant flows to the compressor, where it is compressed and its temperature and pressure increase before releasing heat to the surroundings in the condenser coil. Overall, the coolant's thermal energy is transformed as it circulates, facilitating the cooling process inside the refrigerator.
If your car blows A LOT of white smoke out the tailpipe and it smells sweet, your coolant is probably seeping into the motor through a leak in the head gasket. Check the inside of your oil cap for whitish sludge - this indicates coolant in the oil and usually verifies a head gasket leak.