I get warm air when the car is warmed up, but not very much. the higher I adjust the fan the cooler the air becomes. Note: I took my car to get the oil changed awhile back and they took my cabin filter out and showed me that it was dirty, but I had them put it back in because I figured I could replace it myself for cheaper. I dont know where the thing is located at. Thanks for any information you can give.
Also, is it possible that the cabin filter may be obstructing the mechanism that controls the heater core flow?
At operating temperature is you car at the middle mark in between 160F and 210F? If not your thremostat is stuck open not allowing your engine to warm up before the coolant from the radiator enters the engine. Any "CHECK ENGINE SOON". lights? Just had a similar prob. Changed the thermostat and light went ount at next drive!
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If the fan is moving air at the proper velocity, it is most likely a clog in the heater core or the hose leading into it. Generally, there are 2 hoses about 1 inch in diameter going through the firewall. Those hoses go into a small radiator inside the cars passenger compartment. Go to YouTube and look for 2002 Silhouette heater core removal for specifics. If warm radiator water won't flow freely through the core, that's the problem.
Could be the thermostat in the engine is stuck open , but your engine temp guage would show that the engine is running cooler than usual. Could be a partially blocked heater core , low flow of hot coolant makes for cool air.
When the coolant in the heater core is hot from the engine and your fan is on hot air will blow through the hot fan coil, i figured it out, when i stepped on the gas i could here the coolant squeezing by the control or limiter valve, because the higher rpms make the belt spin faster which makes the water pump pump harder causing more pressure, so when u idle that hot coolant will cool down from the fan blowing on it, u need to find the control valve and open it up to full blast, then hot coolant will always be flowing through your heater coil. ;)
1st off check your (cold) radiator (not the overflow tank) make sure it's
full, next locate heater hoses at firewall with eng. warmed up hold both
hoses 1hose should be hot going into the the other just a little cooler
coming out when it's working right but if 1 hose is hot and the return
is just warm you may have a restriction possibly plugged heater core
now if both hoses are warm not hot it could be thermostat is not closing
properly there is also the heater ctrl. valve but i don't know if you have
a mechanical- electric or vacum operated valve.
ps do these tests with eng at operating temp. fan on med. temp set on
hot. any other ? gimme a shout good luck
It sounds like the heater valve is not operating. Find the valve on the engine firewall passenger side and manually open the valve. Find it by following the 3/4 inch heater hose to the firewall where it is connected to the valve. Most likely the cable ( or vaccum hose)from the temperature dial to the valve needs replacing.
It may be the valve that controls the amount of water entering heating core but I'm wondering if your engine thermostat isn't stuck open. This is what controls the coolant temperature in your engine. It closes off while engine is off. It will remain closed after you start your car until the water warms to a certain temperature then it starts to open enough to keep your car at the proper operating temperature. If it stick open then it will take a lot longer for the engine to heat up and on smaller cars might never heat up enough for your heater. If you live in very cold climates such as where I live in Wyoming, we have to change to a higher degree thermostat so we have a good heater when it's 30 below zero.
Be very cautious here but one way you can check this is to put a piece of cardboard in front of your radiator and stop the airflow that cools your engine coolant. THIS WILL CAUSE YOUR CAR TO HEAT UP AND CAN CAUSE ENGINE DAMAGE IF IT OVERHEATS. Don't completely cover the radiator but if your heater warms up when you put the cardboard in front of radiator it's a good sign that your thermostat is stuck open and needs to be replaced.