Did you bleed the system making sure that there is no air in the system. Check the rad cap to ensure that it holds the pressure
Have you flushed the heater core?
cost to replace heater core 1994 corsica
it could be the thermostat needs to be changed or the heater core needs to be flushed out.these would be the cheaper things to try first.
it might be your a/c heater blend door actuator is bad and not closing when the heat is or you need to bleed your system
Have the heater core flushed. It might be plugged up with corrosion and dirt.
hello Can you tell me why the heater on my 2002 toyota yaris isnt working? Ive changed the thermostat,flushed out the radiator and also the heater matrix behind the dashboard is getting red hot as well
water pump
possible leaking heater core
The heater core can be flushed out and hopefully be unclogged. A water hose can be hooked to the heater core hoses, and water flushed through to clean the core out.
I have changed heater core,water pump,thermostat, the fon works well but only blows cold air plus i have flushed the system.
sounds like you need a new heater matrix.
How did you change the thermostat?