probably a leak at the heater radiator can you smell antifreeze in the car ? if so have it checked
The temperature of the coolant entering the heater core is controlled by the engine thermostat. The engine coolant thermostat is generally located at the engine end of the upper radiator hose.
Low coolant, bad coolant, blockage in the coolant line, bad heater core or element, bad thermostat
Yes, A bad thermostat can keep the hot coolant from reaching the heater core... also, low coolant levels or a clogged heater core can make your heat stop working.
The presence of the valves usually restrict the coolant flow into the heater core.
Low coolant? Thermostat not opening? Control cable not working? Plugged heater core? Heater core "airbound"? Low coolant? Thermostat not opening? Control cable not working? Plugged heater core? Heater core "airbound"?
No coolant, bad thermostat, bad heater fan
Low coolant? Heater core airbound, restricted, or plugged? Bad thermostat? Water pump not circulating coolant?
Insufficient amount of coolant or thermostat not opening
It could be the coolant level is low or a faulty thermostat.
probably the heater core is clogged
no heat can be caused by,blocked heater core insufficient coolant in engine blocked heater hoses from engine to heater core bad heater thermostat bad thermostat in engine bad heater control switch
Low coolant, failed thermostat, failed belt, failed water pump, clogged heater core, etcLow coolant, failed thermostat, failed belt, failed water pump, clogged heater core, etc