Originally Posted by putty34
I have a 2001 SE that is having some heating problems. The tempature seems to be running a lot colder lately. I am getting some heat its just not very hot. Does this sound like a thermostat problem?
First check to be sure coolant level inside the radiator itself is full. Check after the car has cooled a while so you don't get boiling coolant out when you crack the cap.
If coolant is not full in radiator, fill. Run engine up to temperature and run at 2500 rpm for 10 seconds to help push air out of heater core; Repeat 4 more times.
Then check level in radiator and fill. Bleed at thermostat with screw to let out all air.
Like the OP said, it'* likely a thermostat. Is the upper radiator hose so hot you can only hold your hand on it for 10 seconds after the car has been running for 10-15 minutes. That would tell me the thermostat is opening at 190 and above letting out water to the radiator that is at that temp. If not, time for a replacement thermostat, especially if you've never replaced it: it'* 11 years old approximately.
Then with the blower motor on high for a few minutes and the engine running, are both of the heater hoses fairly hot compared to the upper radiator hose--with one being cooler by a step since coolant in it lost heat to the air in the heater core? It may help to have someone run the motor at 2000 or so to push water through better.
If one hose is substantially cooler, your heater core may be clogged. Time for a good flush