Question about 2001 Lexus RX 300

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No heat blower work fine some warm air not hot at all

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May need to change the thermostat,or a vent door is not opening.Also,make sure that the coolant level is full also.Check to see if it has a heater control valve,that is bad,should be inline with the heater hoses going to the heater core.Last but not least,the heater core could be stopped up,use a water hose to flush it out.I hope this was helpful.

Posted on Oct 06, 2009

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2 Answers

Heater not blowing hot air in cabin


Check the coolant level. Check for leaks. Next would be clogged heater core(doubt that 2004) next would be the water pump. Kind of doubt that also, 2004. But if you have leaks?

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How do I get the front heater to produce warm, hot heat from the blower? for 2003 kia sedona


If the heater hoses for the front heater are getting hot, it could be a blend door problem under the dash.

Dec 03, 2014 | 2003 Kia Sedona

1 Answer

How do I get the front heater to produce warm, hot heat from the blower? for 2003 kia sedona


First I would check your radiator fluid level, sometimes being low can have this effect. Usually the rear heaters sit at a lower level and so keep working. If that is fine, then you probably have an issue with the diversion door or controller that controls the hot/cold mixture.

Dec 03, 2014 | 2003 Kia Sedona

2 Answers

2005 Mitsubishi galant heat doesn't work. Blower works and air conditioning work but no heat comes out. Coolant is full. Just feels like outside air temp with heat on hot.


Your thermostat may be stuck open and your coolant isn't getting hot to warm the cab.Here's a link on how to replace,very easy to do.Don't let your pets near spilt coolant,will kill them.

Oct 11, 2013 | Cars & Trucks

1 Answer

Heater doesnt work


To troubleshoot this types of problem,click the link below :---
Car heater blowing warm, but not hot air?http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html

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Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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No heat on car? http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

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Heater blows intermittently and temp gauge goes erratic?

http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html

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Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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Heater/AC blower motor not working?

http://technoanswers.blogspot.in/2012/02/heaterac-blower-motor-not-working-on.html

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A/C, heater, defroster fan, not working? http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html Heater problem?

http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html

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This will help.Thanks.

Mar 27, 2012 | 1994 Volvo 960

1 Answer

Heater stopped putting out heat, blower works fine air conditioning works fine


What you are saying is when you turn knob to hot you don't get any heat.? Let's start with the basics. Make sure your cooling system is filled up with coolant. Then with the engine warmedup and the temp gauge on the dash indicating between H and C. Find your heater hoses under the hood and feel them. Are they BOTH very warm or hot? os is only 1 warm and the other cool? If both are warm/hot, and still not getting heat from your vents. You have a problem with either the temp controller or the blends doors under the dash. usually the blend doors and it requires removal of the dashboard to get to it. If the heater hoses are wrm and cold then you may have a plugged heater core or water pump not circulating properly.

Jan 14, 2010 | 2000 Jeep Grand Cherokee

1 Answer

My blower blows fine but....


Since your blower is working and it is a heat issue,thats where we'll start,First thing is have you checked the coolant level in the radiator when engine is cold,make sure it is filled to top,next verify you have coolant in reserve ,Start your van and get it up to normal operation temperature,If your heat gauge on the dash works correctly it should be 190 degrees,Now lift the hood and locate the two heater hoses going into the heater assembly at the fire wall,Both hoses should be hot to hold on to,if both are hot and no heat inside your problem will be the blend air door in heater assembly.
if neither hose is that hot you need to replace the thermostat in the engine to get it up to 195 degrees.
if one hose is hot and one is luke warm then the heater core is blocked and to blame. hope this helps you.

Dec 30, 2009 | 1994 Cadillac DeVille

2 Answers

Engine temp is fine - thermostat OK - no heat


The blend motor to go from cold to hot is located on the blower motor housing. They are usually mounted close to the blower motor.

Oct 02, 2009 | 2000 Buick LeSabre

1 Answer

Heat does work all the time


Make sure the radiator is full. If so have someone back flush the heater core for you. After this it gets complicated......

Nov 22, 2008 | 2005 Ford Taurus

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