Have you checked your thermostat?
Because you don't have enough coolant in your radiator.
if engine overheated when heater core blew, u may have damaged bearings in engine, or dropped a rod, or maybe water pump went out as well
The heater core is leaking. GEt a manual from DISCOUNTAUTOREPAIRMANUALS.COM and replace it.
Check the radiator for full coolant. Check the engines water pump and thermostat, as the engine coolant carries heat from the engine into the heater core.
It could be the heater valve which is located under the hood to the passenger side down below the radiator and fan units.
no belt, low coolant, failed water pump,
well you could just turn the heater off heater blower ---- If it is a car heater then check your coolant level. the heater is driven off a heat converter that is fed by the radiator system. When the coolant fails to pump round the radiator system the car internal heater doesn't work. Driving without coolant in the system will result in the engine overheating and seizing.
What do you mean by "has no heat"? No air blowing out, blowing out cold air when heater is on, blowing nothing at all? Heater not turning on? What specifically is happening?
No one knows if:The heater is NOT blowing - or blowing on high speed only, or... The heater IS blowing, but the air is NOT hotEither way, the "Related Questions" below will get you started
this could also be the heater core, it could be leaking and you would see that your radiator is low as well,, if still blowing but never gets hot or changes temps... jsut dealt with this issue as well. If the heater blower works sometimes and other times it doesnt,, this would show that the core needs to be refilled with antifreeze from radiator and check levels if low very well could be it.
Your heater core is leaking in it's housing box and blowing moist air through the heater/defroster. Try bardall radiator stop leak. If no help, install new heater core. Chuck.
You can turn on the heater as that will cool the coolant more. If the car is sitting still and off, opening the hood will help. If you have a hose available..spraying the radiator with help drop the coolant temperature by increasing the radiator's efficiency.