Question about Cars & Trucks
Air is getting into the system somewhere, check head and intake manifold for leaks.
Posted on Feb 20, 2012
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Posted on Jan 02, 2017
sounds like you have a bad temperature sensor in dash or the cable has eitehr broken or come off the heater switch under the dash!!
Posted on Dec 07, 2008
SOURCE: Heater blows cold air
If the "Heater In Hose" gets hot, and the "Heater Out Hose" does not get hot, than either the Control Valve is sticking closed, or your heater core is plugged up with ****!
Have you used "Barrs Leak" or a simular product for a radiator leak? That will sometimes clog the heater core.
I have a 1993 Grand Cherokee, which "Normally" throws very hot air out of the heater, but lately sometimes it only throws warm air, till I make my first stop, than it gets hot.....all because the heat control valve is hanging up.
Low water in the radiator will also cause a heater to not work.....if the water level is too low to circulate to the heater.
Posted on Feb 18, 2009
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)
Posted on Jun 21, 2009
Sounds like the thermostat needs to be replaced. If you do the work yourself be sure the temp threshold is correct and the flow direction is correct when installed. Good luck to you
Posted on Oct 16, 2009
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