Heater blows cool air - heater is not working?

They both seem to be warm one might be a little hotter than the other.

I flushed the heater core as suggested and it solved my problem. Thank you very much for your support and ideas.

No more blankets required. :D

Turn on heat and blower works just no hot air. If it is idleling for a couple of minutes and you turn it on it without driving it you get a very faint sense of heat from the air blowing out but when driving you get nothing but cold air. Should I automatically think heater coil or are there other things to look at first.

Temp gauge reads about 160. What I thought was a little bit of hot air apparently is none. The hoses going to the heater coil are warm but not hot

Are you getting vacuum to the heater head (control panel) in the dash, it may not be switching over to heat. If not you will have to track down your vacuum line, it normally is on the passangerside behind the glovebox and is a orange color.

Does it matter that when I switch it from cold to hot air you can hear the tone of the blower change but no difference in temp

Hi, I had a heater hose start leaking today, its the one that come from the driver side, lower Rad hose. I replaced it and poured a little antifreeze in there, and thought I was done. Now the Heater will not blow warm air, and the truck will not heat up over 150. It usally ran alittle under 210. I had heat till today. The heater core isn't leaking. I took the cap off and let it run for an hour, I added more fluid, and it still never heated up. I put the cap back on and drove it around the block and it never got over 150 and the heater never blew hot air. I parked it and I took the rad. Cap off and it didn't spew coolant, it just sat there, Ive never saw this b-4. WHAT DO I NEED TO DO? Help! Thanks

I have a 98 chevy s10. Its a 2.2 manual transmission. My problem is that it does not run as hot as it should. It seems to run anywhere between 100-160 degrees. I have changed the thermostat, coolant level and for air in the system. I am not loosing coolant also. The truck doesnt over heat and because the T-stat doesnt open I have no heat. Its cold where I live been the weather has never been a problem. Could this be a fan clutch problem, water pump or head gasket? Thanks for your time

Thought maybe thermostat, replaced that, no change. Just put a new water pump on, checked that and radiator flows fine. Pulled the heater supply line off the water pump and applied the garden hose to it and get no return whatsoever. It happened so abruptly that I have my doughts that the core just pluged up. Is There a electriical component or fuse to the temp control knob on the dash that i'm not finding? Thanks for any help you might give me.

There is no heat comming through the floor vent. All the other vents work but no heat at the floor.