Trying to understand from what you wrote..It sounds like something is not recirculating correctly.I would change out the thermostat first because it's the cheapest thing you can do..It might be getting stuck...not opening normal..When you said you turned on the heater and no hot air.. there's a hose right there at the thermostat that runs to your heater core usually under your glove box..If your not getting hot air then the water is not recirculating through your heater core..it could be a valve that is stuck when selecting heat that's not working also.. Flush your radiator..Open the radiator cap only after car motor has cooled down..Drain the radiator...There's a small turn valve nut at the bottom of it..Watch what comes out..is the water rusty color especially as it slows down from draining...They make radiator flush.. Also you can buy a thermostat that opens sooner...Like if yours is 180...you can buy one that opens at 160..A lot of cars are missing the black spoilers under the car that help push air up to keep motor cool..Make sure your water pump is good..Cat converter is not clogged in front of muffler...It will make you car run hot if it's getting clogged...Also Find out where your losing coolant...I've seen on holes in the heater core that leek from where your AC condensed water drips out..It will fool you and loose about a cup of water.. Smell the water your loosing also....if it's dripping from where the AC water is and you smell coolant...You have a bad heating core
SOURCE: car is overheating and not blowing hot air.
if your not losing coolant its either a blockage or bad waterpump and more than likely its the water pump
SOURCE: Chevy Venture Overheating
Almost sounds like the same symptons as my van. Turns out the guage was not the problem. The van was in fact running hot because the electric radiator fans were not kicking in when the engine was hot. I replaced the relay switches for the fans. There are two of these in the fuse panel under the hood. There has been no problem with overheating since
SOURCE: 2006 Pontiac Torrent heater blowing cold air
hi
check the heater hoses and if both are hot then the mode door is broken
i have replaced 2 in the torrents(not a nice job)
SOURCE: 2001 s-10 heater blows cold air, then hot air,
May want to start with seeing how much coolant you have in the system. Sounds to me like you are low. Make sure to check it while its cold. Removing the rad cap while hot is a bad Idea, may get burn!
SOURCE: 2004 Chevy silverado heater blows hot than cold hot then cold?
Sounds like your thermostat is stuck open
For car running hot and overheating issues, I suggest to you go
through this help links. Click this link below and go through the
troubleshooting procedure to take care of the problems: ----Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and
troubleshooting?
http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?
http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html
---------------------------
Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------This details will help.Thanks.
For car running hot and overheating issues, I suggest to you go
through this help links. Click this link below and go through the
troubleshooting procedure to take care of the problems: ----Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and
troubleshooting?
http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?
http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html
---------------------------
Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------This details will help.Thanks.
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