Question about Cars & Trucks
After the car has warmed up I get just a little bit of heat. Then the warm air goes away. and all I get is cold air.
You may have air in coolant system you should have a bleeding point somewhere and good idea to change pressure cab too.
Just becarefull engine coolant and heating system is a pressurized system that works on high temp. can cause a serious injuries!!Safety.
you need to run the car on idle with heat on at high speed and open and close the bleeding valve with proper size and long reach tool
till no air bubbles comeout make sure you run the car enough that thermostat opened and engine run on normal operation temp. for a while.good luck.
Posted on Dec 07, 2012
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Posted on Jan 02, 2017
SOURCE: heater only blows warm air.
The hoses from your heater core should be very hot to the touch. Check the hoses going to the core from the water pump. It should be very hot. The return hose should also be very hot. Now check the hoses going to the core. If they are not the same temp, then your heater control valve is not working correctly or the vacuum is not working. At any rate, locate the vacuum line going to the heater valve. Remove the silver bar on the valve from the plastic plunger arm. You will have heat all the time now if it was only a vacuum problem. You can fix it later when it's warmer out. BTW a 200* thermostat will make your heater even hotter.
Posted on Nov 21, 2008
SOURCE: 1999 Ford Taurus, no heat.
Try checking the two pipes that go into and come out of the heater matrix, is one of them hot? if it is there is an air lock within the matrix, Also is the thermostat opening fully? Sorry i know you said you have changed it twice already but take it out check settings when it should open and close, then boil some water and test the thermostat
Posted on Dec 30, 2009
both hoses is hot signifies thatcoolant circulation is just fine check the blend door actuator it might be stuck.pan the heater temp controller from hot to cold do you feel any change in temp of the air from the blower?if you dont feel any change check the blend door actuator
Posted on Jan 17, 2010
SOURCE: No heat/defrost 01 corolla
Sounds like you have air trapped in the heater core when you flushed the heater core. loosen the upper most heater core hose and run the engine untill coolant seeps out. Wait until the coolant has reached running temperature.
Posted on Jan 18, 2010
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