Heater not working

It was leaking water frm radiator 3100v6 ls

Engine Cooling problem
1996 Chevy Lumina 6 cyl Front Wheel Drive Automatic

the temp gage in the car says it hot and the top hose on the radiator was steeming and where is the themostat

You either have a leak or a bad thermostate if you work on ur own car then u might start by dumping in antifreeze and running the car to see where it's leaking and if it's not leaking then replace the thermostate.

Start with what makaveli says, if you cant find the leak, then trace that top hose it will attach to a metal housing with 2 or 3 bolts holding it on, the thermostat is in there. If you coolant dont get low that quick or smells burnt then its your thermostat stickin shut. After you change the thermostat and refill the coolant you might have to bleed out the air. There should be a small screw on the thermostat housing, on one of the lines comming from the heater core, by the water pump, or all 3. With the car running open all the screws you find untill you have a solid stream of coolant come out. If that dont work check your water pump, with the car running squeeze the big hose coming off the pump(that runs into the bottom of the radiator) you should feel a surge of water if you dont your pumps bad, if you do do the same to the top hose, if you dont feel it there you might have a cloged radiator, reverse flush it. Hope it helps

My temperature gage gets up maybe 1/8 or sometimes 1/4 past the half way mark. And I have noticed my fan does turn on(although my 2nd fan never turns on) but when I am in idle or when I am sitting in traffic my car starts to get hot but doesn't overheat. I am completely puzzled as the low coolant light has been on all winter as well but the coolant has never actually been low. So with that I have people telling me the sensor could be bad. And then just today the Service Engine soon light came on so Now I am completely worried and ready to figure out what could be wrong with my car. I can give more details if needed.

I replaced all all relays & fues located down by heater. Heater still will not blow. Checked blower and blower is good. But controls will not make heater blow

Heater problem
1992 Chevy Lumina Automatic 167024 miles

we've replaced the heater core, the termostat, the switch, and checked and rechecked the vacuum lines. The antifreeze/coolant level hasn't gone down, you can hear the water circulating, and you can't smell antifreeze. The car doesn't overheat, but it just blows out absolutely COLD air. Can't figure it out. If there were a blown head gasket could that do this?

I have a 1990 chevy lumina car. Now a year ago my heatercore went out I didnt have the money to replace it so we had it rerouted so we could still drive our car. Well we got the heater core and had it put in but no heat! We tried changing the thermostat still no heat so we replaced the water pump. Radiator and Heater hose yet still no heat it comes out luke warm on days the sun is out but other than that nothing! And It isnt really pushing out the air at times either so I am thinking it may be my blower but wouldnt I still feel some kind of heat seeing how it is pushing out the cold air. So I Am stumped as to what to do next any help will be apreciated.

I have a 1990 chevy lumina apv van, I added bars leak into the radiator and now I have no heat, I replaced the heater core and the thermostat and I still have no heat, whats next?

Heater problem
1990 Chevy Lumina V6 Front Wheel Drive Automatic 190000 miles

I have a 1990 Chevy Lumina 3.1 I have no heat the blower blows but does not blow hot air my coolant is fine and the engine temp is at normal operating temp. Is it the heater control valve and where is it?
Not sure if it is related but the day it started blowing cold I parked on a slope meaning the passenger side of the car was higher than the left when I ran into the store and came back out it was blowing warm and was fine the rest of the day the next morning it went back to blowing cold.