Question about 2003 Chevrolet Astro

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High water temp low heat

High water temp but low heat

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Check heater blend door is closed

Posted on Feb 13, 2014

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Heater problems on 1999 Chev Tahoe V8

check coolant level

Posted on Jan 17, 2010

  • 9 Answers

SOURCE: 2003 impala temp. gage goes high & low and no

could also be bad water pump and coolant is not circulating

Posted on Feb 25, 2010

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I have a 2003 mercury sable fan blows low setting high setting just fine no heat what could cause this?


Could just be low on coolant/water...next would be a stuck thermostat...both small repairs...hope this helps.

Nov 16, 2015 | Mercury Cars & Trucks

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Have a 2009 Nissan Quest I can't turn the heat off. Just stays on a high level of blowing out heat .


If you have a fan that has different speed settings (1234, or low med high etc) and the only one that works is high - then the blower resistor pack has failed. If you have a climate control unit (where you just pick a temp you want) then the fan is controlled by the heating system and it sets fan speed. If you have climate control style try lowering the temp to a lower setting (current temp in vehicle) and see if fan slows down. If not then climate control unit or fan resistor bad. If dial type and you get nothing on lower settings (only high works like mentioned above) you need to change blower resistor. It is located under dash near the fan itself. Look for small unit bolted in duct near fan with wire plug going to it.

Feb 23, 2015 | Nissan Cars & Trucks

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2002 Chev. Traiblazer- heat guage jumps from low value to high values almost instantaneously . The dealer has replaced the water pump and the clutch fan but the problem persists. Sometimes there is no...


Is the engine actually over heating or just the gauge giving incorrect readings?? The stepper motor in the console's temp gauge could be defective. Have someone with a laser heat gun check the temp of the engine around the thermostat to find the correct temp.

Jul 07, 2011 | 2002 Chevrolet TrailBlazer

2 Answers

2003 impala temp. gage goes high & low and no heat comes out of heater. it continues to cycle like this as I drive. When temp. gage goes up the heater quites.


Have u checked the coolant level? this type of problem useualy indicates the coolant is low, if it is low you need to have the engine cooling system tested for a leak, the coolant goes out somewhere.

Jan 29, 2010 | 2003 Chevrolet Impala

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Low or hardly any heat engine doesn't blow high heat blower blows high but not temp


it may be time to put a new thermostat in to get the temp up where it should be,when you get one make sure it is the 190 degree thermostat

Dec 20, 2009 | 1997 Buick Skylark

2 Answers

Low heat when idle


Sounds like a bad water pump. Is the temp gauge reading high when you are idle? Make sure your fluid levels are all good.

Oct 27, 2009 | 2000 Chrysler Cirrus

2 Answers

Heat will stay on high until turn engine off and back on


check dial switch, check valve that lets water run through heater core

Aug 23, 2009 | 2000 GMC New Sierra 1500

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