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No heat and lower rad hose cold - 2000 Chevrolet Tracker

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That would indicate a plugged heater core or the blender valve is not opening up the heater core

Posted on Dec 31, 2010

  • dhk583 Jan 02, 2011

    I had the same problem with my 2000 silverado. I simply took both heater hoses off and flushed it GENTLY with garden hose. Did I mention I did this GENTLY. I flushed from both directions 3x's for a few seconds each. Barely a trace of brownish water came through, but it solved the problem. I have tons of heat.



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How can iget the hot water to the front heater coil both hoses stay cold

does the engine's cooling system thermostat open and close?
(does upper and lower RAD hose feel warm then warmer)
are the hoses to the heater coil (both hoses) free of obstructions?
(pull them off and blown them out)
is the heater coil able to pass coolant in one side and out the
other? Hook up garden hose to inlet house (disconnect from pump hose nipple) disconnect heater outlet hose from pump and drop into a pail to catch outflow)
Does the water pump work as it should? ( should see fluid flow when looking through rad cap opening while engine is running)

Jan 27, 2015 | 2005 Kia Sedona

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I have a problem with cold air from heat vents.

Replace the thermostat. When the engine is hot. There isn't a hose on it that you can hold for more than a couple seconds. 200+ degrees.

Dec 16, 2014 | 2004 Hyundai Elantra

1 Answer

There's a clunking noise coming out of the lower rad and it's making the hose pulsate. There is no pressure on no hose No heat

is cooling system full of anifreeze..if not it has an air lock in it that clunks like a steam radiator in an old building...need to check level and maybe replace thermostat..

Feb 10, 2013 | Cars & Trucks

1 Answer

Car overheated, no heat inside car, top rad hose hot, lower hose cold.

Is there any pressure on the top radiator hose when the car has been running for awhile? If not the first thing I would do is replace the radiator cap. Make sure the radiator is full. Let the car run again to make sure you have pressure on the top hose. If you have pressure let the car run until you have equal amount of heat on both hoses. Make sure the fan works. If no pressure than you need to replace the thermostat.

Dec 11, 2010 | 1999 Chevrolet Cavalier

1 Answer

It won't heat what would cause that?

ther are a couple of things that would cause this. im assuming that the blower is still working (blowing cold air) .if the blower is still working i would check the coolant level in the rad first. if the coolant level in the rad is good then i would check the thermostat. you can do this by getting the vehicle up to operating temp and checking the upper and lower rad hoses. if one hose is really hot and the other is cold or luke warm i would replace the thermostat. ( watch out for the belts when checking the hoses!)
if both hoses are the same temp the thermostat is probably good. from ther i would check the two coolant hoses that are going into the car (you should be able to see them on the passenger side of the engine compartment going through the firewall into the cab). same idea as the two rad hoses , feel the tempeture of the two hoses and if one is really hot and the other is cold or luke warm, then your heater core needs to be flushed out . any more questions just leave a message !

Dec 03, 2010 | 1998 GMC Sonoma

1 Answer

No heat in 1995 crown victoria, thermostate has been changed. the rad was flushed, Hoses top is warm to hot, lower is warm to cold , car is not overheating

feel the hoses that go into the heater core at the firewall,if both are hot,either a door under the dash is stuck shut or you need to flush your heater core by removing both hoses and flush with water hose

Jan 31, 2010 | 1995 Ford Thunderbird

1 Answer

08 Sentra. Car won't get past 3 bars heater output is lukewarm. Even after 1hr plus running the upper rad hose is hot lower rad hose very cold. Any suggestions? P.S. It is -47 with wind chill and heater is...

it is likely air flow if air is cold enought it can super cool a rad if you cover part of the rad partialy and the heat starts to come then slowely cover it more and more untill it hits the proper heat range

Jan 08, 2010 | 2005 Nissan Sentra

2 Answers

1994 Honda Civic LX\overheating within 2 mile drive

Remove and raise upper hose at thermostat end and remove lower rad hose.
Fill rad with a hose and watch for flow from bottom rad hose and/ or bottom rad hose connecton.......water should fall though rad easily.
Honda rads are cheap.....any restriction....replace rad.

Remove thermostat....fill thermostat housing with hose and watch for water flow at bottom rad hose.
Flush good.

Remove heater hoses.......flush back and forth until a good flow is present "With heater control set to hot" if no or poor flow....replace heater core.

Stop leak can plug everything.

Also.......not likely causing over heating....but your mileage,if you do not know if the timing belt has been changed.....CHANGE IT NOW!
Water pump is optional at this mileage.

Aug 23, 2009 | 1998 Honda Civic

1 Answer

92 towncar

It is possible that you may have an air lock in the system. You need to drain the rad and remove the upper most heater hose from the heater core and raise the hose up high . Fill the rad until coolant comes out of the heater core pipe. Carefully reattach the heater hose. Fill the rad slowly allowing trapped air to escape.This may take a while. Once the rad is full put a catch basin on the floor under the rad filler neck.Start the car and let it run to operating temperature.Allow the expanding coolant fall into the basin.Once you see circulation in the rad you can slowly top the rad off.once you do this replace the rad cap and fill the reservoir bottle 3/4 ways to the top. Shut the car off and let it cool off filling the bottle as necessary.Hopefully this will cure your problem. Good luck :-)

Dec 09, 2008 | 2000 Lincoln Town Car

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