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Check the coolant level in the radiator. If the coolant gets low enough the heater is the first thing to stop working. If there is plenty of coolant and the temp gauge is get in up to the half way mark than it's possible the heater core is just about plugged up. Your local repair shop should be familiar with flushing the heater core. I have had many successful heater core flushes over the years and it can save you thousands. If the heater core is successfully flushed it may not be a bad idea to have the coolant flushed at the same time.
this may be a goofy question BUT do you mean flushed the radiator not the heater core. Heater core is on the firewall.
Check the hoses going into the heater core to be sure they are both hot after the car has reached running temp. This will let you know if you have a blocked heater core not radiator.
Just wondering?
is there a chance that one of your heater hoses are clogged? or where they connect to the engine are clogged still? sounds like a clogged system. Cracked heater housing? Outside air bypassing the heater coil while driving?
If you flushed the coolant with the thermostat in, chances are you didn't flush the coolant. Regardless, it's easiest to check the controls inside first. Does the blower fan work? Does the air flow change from floor to vent, to dash as it's supposed to? Does the A/C change temps when knob is turned from cold to hot? Post results.
Get your radiator and heater core flushed out, if this doesn't fix the issue then your contol damper is probably not functioning like it should. The heater core and radaitor should be able to get flushed at the same time and this is a good thing to do on occasion anyway. Have you check your engine thermostat? this could be the culprit if it is not closing and allowing the engine to heat up.
this is probibly a blockage in the radiator or water pump issue start by flushing the radiator,then check that water is flowing thru the radiator and water system.
SOUND LIKE PROBLEMS IN THE AIR TEMPERATURE CONTROL DOOR NOT OPENING.CLIMATE CONTROL VECHICLE HAS TO BE HOOKED TO DIAGNOSTIC EQUIPMENT TO CHECK.IF YOU REPLACED THERMOSTAT.FLUSHED HEATER CORE AND RADIATOR.YOU HAVE THE RIGHT AMOUNT COOLANT IN THE COOLANT SYSTEM.LET DEALERSHIP CHECK IT OUT.
if engine temp is normal after running awhile. i would try to flush the heater core.(disconnecting the heater hoses from engine and flushing separately) ford cars and trucks have a "brown coolant" problem and the coolant will eventually clog heater core.
you did check your coolant level right? Has anything been worked on as far as cooling system lately? Radiator, thermostat, rad cap, antifreeze changed/flushed?
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