Question about 2001 Chevrolet Silverado 1500

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Heater blowing luke warm air. Is it worth trying to fix it myself or better off having mechanic do it?

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Look around under the hood for a broken, cracked or dislodged vacuum hose.

Posted on Feb 08, 2010

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Heater temp on high only bows luke warm air after driving. A/C works just fine.Plenty of cold air from it


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Jan 27, 2016 | 2000 Chrysler 300M

1 Answer

Only luke warm air comes out of front. I get hot air to blow in the back vents. Will flushing the heater core fix the problem? 1999 ford expedition


its possible. The only way to know is to flush it. You will know if it was plugged when you try to flush it and it has little flow at first and then gets better. flush it in both directions until there is no resistance to the flow.

Dec 22, 2010 | Ford Expedition Cars & Trucks

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My 2003 325i blows cold air, heater never heats up, what's the potential causes/cures?


Potential causes: Low coolant- fix by adding coolant Thermostat stuck closed- would also cause engine to overheat Thermostat stuck open- would eventually blow at least luke warm air Heater core plugged- Get it backflushed or replace it These are the most common causes

Dec 14, 2010 | 2003 BMW 325

1 Answer

Cool air coming from my 1990 deville changed raditor and therm. still luke warm.


try backflushing the heater core,remove heater coolant hoses and flush both ways with a garden hose,do you have a air compressor ,blow water back through heater core both ways,this asuming that all valves are working allowing coolant to flow and all air doors in car are opening,if so this fix has worked many times for me in older cars note works better to hook water hose to hoses or a short peice of hose on heater core,good luck

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2 Answers

Heater is blowing luke warm air. does not get any hotter


Quite a few idea's come to mind.
1) Thermostat is stuck open, causing the engine to run cool.
2) The vacuum valve that opens and closes the air "flap" is stuck open, allowing cool air in all the time.
3) The vacuum valve that opens and closes the line that feeds the heater core isn't opening all the way.

Jan 30, 2010 | 2004 Chevrolet Impala

1 Answer

Heater only blows out luke warm air


Your heater cour in the dash needs to be cleaned out or replaced. It is where the 2 hoses go threw the firewall. I have taken the hoses off and blowen compressed air threw it and it helped. if you got to change it you will have to take it out from under the dash.

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1 Answer

Mercedes 190E heater blowing just luke warm air


there should be an electric water pump exclusively for the heater. on these 201 body cars it should be under the hood, on the passenger side,near the fender well. when the heater is engadged, this pymp should turn on pushing the hot water into the heater core. if these are not working, it will obstruct the water flow.

Nov 28, 2009 | 1993 Mercedes-Benz 190

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