Not much heat..!!...

[69mock1]

So here we go it's a 2005 five-speed 107 thousand miles..

She runs great, motor heats up in a decent amount of time and maintains normal operating temperature throughout.. However for some reason I don't get a lot of warm air coming out of the defrost, the floor, or the dashboard vents.. it's lukewarm at best..

Any ideas? .

Also it's a factory non-AC car ..

[avguy]

Have you checked to make sure the coolant level is ok in the overflow tank, and also that both heater hoses are hot? Assuming all of that is ok, then the problem is probably the blend door not working correctly.

[Thymeclock]

So here we go it's a 2005 five-speed 107 thousand miles..

She runs great, motor heats up in a decent amount of time and maintains normal operating temperature throughout.. However for some reason I don't get a lot of warm air coming out of the defrost, the floor, or the dashboard vents.. it's lukewarm at best..

Any ideas? .

Also it's a factory non-AC car ..

Lack of heat from the heater is a classic symptom on any car. Change the thermostat.

[69mock1]

I could see that if the engine was running hot however that's not the case at all.. In addition if it were stuck open then when the car reached operational temp it wouldn't matter as this would be a moot point and "heat" would be present..

[xintersecty]

I could see that if the engine was running hot however that's not the case at all.. In addition if it were stuck open then when the car reached operational temp it wouldn't matter as this would be a moot point and "heat" would be present..

Yes, that is true but not the way your thinking.

There are two loops: One uses big hoses, the second uses smaller hoses. The big hoses are for the engine cooling to the radiator. Once the T-stat opens that loop takes away all the heat away from the engine starving the loop going to the car heater. Big pipes matter!

So AVGUY asked are the hoses to your heater hot? If so, then there is a problem with the blend door. You need to use SCIENCE (measurement) to properly diagnose car problems. If there are not hot then look at replacing the T-Stat.

[69mock1]

Thanks for the quick response.

my previous post was referring to the member who was posting about the thermostat being defective which cannot be the case in my situation.

with regards to the heater hoses, htey are both hot/warm when the engine is at operational temp.i don't see how it could be the blend door as all linkage to it on my aveo are mechanical and seem to be operating correctly upon inspecting..

"plugged heater core possibly requiring back flushing maybe an answer??"""

[xintersecty]

Thanks for the quick response.
with regards to the heater hoses, htey are both hot/warm when the engine is at operational temp.i don't see how it could be the blend door as all linkage to it on my aveo are mechanical and seem to be operating correctly upon inspecting..

Well something is blocking something. Since the "hands sample method" has not given us hard core numbers, I suggest switching to a IR temperature sensor and aim at these points
1) radiator inlet
2) radiator outlet
3) heater core inlet
4) heater core outlet

If there is a temp drop that means there is a form of heat exchange. You need to measure the air temp into the heater box and the outlet. Put your fan on medium and recirculate mode.

If the air temp does not increase by a lot say 5 degrees, then you might have blockage in the air flow and check the air filter assuming you get a big drop on water temp to the heater core. It might seem silly to measure the water temp to the radiator, you need those numbers to make sure water is flowing in the system or see if the TSTAT is stuck open/closed.

[Thymeclock]

It might seem silly to measure the water temp to the radiator, you need those numbers to make sure water is flowing in the system or see if the TSTAT is stuck open/closed.

When was the last time the thermostat was changed?