I have a 2003 tahoe, and when i got in it this morning no heat (air would but not hot air) would come out of the vents unless i turned it up to 90 (which is full hot) otherwise it was cold just like it was at 60 (full cold). MY rear heat also does not work, but has not been working for a while. Pleas help!
heater problem
- Thread starter Tahoe7689
- Start date
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oneradride
Full Access Member
What is your temp gauge reading? Thermostat stuck open?
dave/angie
New Member
Sometimes low coolant will do that.
My engine temp guage reads the what it always has just under 210 which is where it is when the engine is warm and i have been driving a while. I do have a coolant leak somewhere that I am trying to fix, but I just topped off the coolant a little before this problem surfaced. (the coolant leak is very small)
oneradride
Full Access Member
I’m not sure where the heater core is on these. I’m sure someone else will chime in and help. What I’m getting at is….. when you have a leak the highest components are effected, I.E. the heater core. If you have an air bubble in there, you won’t have heat yet your gauge will read normal.
Full it up, warm it up, then go off roading, maybe even roll it. This will cause the air pocket to escape. I’m kidding of course……. :smilielol:
Full it up, warm it up, then go off roading, maybe even roll it. This will cause the air pocket to escape. I’m kidding of course……. :smilielol:
DarkTahoe00
Full Access Member
Check around your radiator hoses grab them and wiggle them around to see if they leak around the neck of them and check thremostat housing and check the bottom of your water pump, water pumps have a wipe hole at the bottom of them so when they strat to go bad they'll leak out the hole a sign they're going bad. Also on some cars have a coolant bleed valve to help get out the air bubbles out and some tell you just to leave the radiator cap off! Hope this helps you.
I have checked hoses and looked all around the water pump, and have not found any leaks (the water pump was replaced a year ago because it started leaking so that is a new part). So you are saying that this bubble could cause my computer climate control to work funny? I have heard of a pressure test for the coolant system to check for leaks, how would I do this?
DarkTahoe00
Full Access Member
Not sure bout a pressure test, a pressure test isn't hard and it'll help you find a leak, but if you leave the radiator cap off before you start it and let it sit for a while its call the burbing process it'll cycle all the air bubbles through your cooling system and allowing the air bubbles to escape.I had to do this to a friends Taurus and on my Maxima it had a coolant bleeder valve on it,I had the same thing very little heat and till i did this and have great heat now. You also might want to check around the alternator area there is a coolant line that goes in to a 3 way and branches out you can start at the throttle body there are two hoses that go in and out of it try to follow them and see if thats where your leak is coming from. Also it might be that your Climate control actuator is only working half ass. Try to listen to see if its opening and closing all the way by slowly turn from cold to hot,try to listen on the passenger side under the dash around the console.
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Rivieraracing
Full Access Member
The best way that I have been able to fully get all the air bubbles out of some picky cars was to park my truck on an incline, front end facing up the incline, with the car idling and no radiator cap on. By doing this makes the top of your radiator the high spot and allows the bubbles to get there easier!!
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