Sounds like you have a coolant leak. When cold, put a pressure tester (hand pump with fitting to the radiator neck) and see if you can see any coolant leaking. Once found, fix the leak.
Check your coolant level and clean out your radiator, inside and outside.
there might not be enough coolant inside the radiator, i would check that first. also the heat switch might not open so that the coolant cant make its circle.there is a small possibility that the coolant pump has air around it and it cant regulate the coolant around the engine.beware, never open the radiator tap when the engine is hot.if you overheated the engine ( redline that is) you could have done permanent damage to the engine.
It means the engine is overheating. Possible causes are, thermostat stuck in closed position, low of coolant, cooling fan not functioning, blown head gasket, clogged radiator inside or outside, or water pump not functioning properly.
Could be,low on coolant, stuck or sticky thermostat, faulty fan clutch, restricted coolant flow inside radiator, restricted air flow outside radiator, broken or missing fan shroud,
In the radiator, coolant recover tank, heater core, and inside the engine water jacket.
Coolant reservoir, or directly in the radiator. If you are having to add much coolant, you need to find out why. Serious engine damage can occur if it is leaking inside the engine.
Could be, Restricted air flow through outside of radiator, Restricted coolant flow through inside of radiator, Faulty fan clutch, Missing or broken radiator fan shroud, Faulty thermostat, Low on coolant,
The radiator consists of cooling fins around tubing which the coolant flows through. A water pump circulates coolant from the radiator through the engine. A smaller radiator around the dashboard makes up the car's heater. An automotive cooling system has 6 basic components; the radiator, coolant/water, pressure cap, expansion tank, thermostat, and the water pump. When an engine is running, the water pump circulates the engine coolant inside the engine. As the engine heats up, the thermostat opens (usually at above 160 degrees), which allows the engine coolant to be pumped into the radiator, through the top radiator hose. The coolant flows through tubes inside the radiator, and is cooled by air passing over the car's grill. The cooled coolant exits the radiator and reenters the engine through the bottom radiator hose. The pressure cap holds the entire cooling system under pressure, which allows the coolant to reach higher temperatures without boiling. The expansion tank holds extra coolant for the system and allows for extra capacity when the coolant expands with the heat.
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.
Follow the top radiator hose from the radiator . The hose connects to the engine coolant thermostat / water outlet assembly bolted to the engine . The engine thermostat is inside the housing
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
Could be, a stuck closed thermostat, low on coolant, bad head gasket, cracked head, restricted coolant flow inside radiator, restricted air flow outside radiator, missing or broken fan shroud, fan clutch inoperable,