Question about 2004 Pontiac Grand Prix

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Have very little heat from blower just luke warm

Have very little heat from blower just luke warm air at best blower is fine and just replaced thermastat. coolant level fine. could it be a heater control valve and if so where is it located? thanks

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You have a bad/stuck/ wrong thermostat

Posted on Feb 05, 2010

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1 Answer

Heater not blowing hot air


when you operates the heater button worm water of your engine's water jackets enter to the evaporator locates inside your A/C blower & air flows through it & air becoming worm. Therefore I proposed you to check your vent linkages for vent doors inside the blower unit.

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2003 vitara, heater not working properly, luke warm air on high,changed thermostat,drained radiator, still very little heat,


Check for head gasket replacement. Headgasket may be bad.

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Jan 21, 2013 | 2003 Suzuki Vitara

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Luke warm heat


Your blower is working properly with heat and air.The blend door could not be opening completely on heat to vents or the thermostat is stuck open,not heating coolant,here's how to check and replace the thermostat,remove,put thermostat in pot of water with temperature at 180 degees,it should open all the way and close all the way when removed from water.Here's the new part.

Jan 18, 2013 | 2003 Nissan Murano

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.

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1 Answer

No heat from heater, blower works ,fan works ,coolant good, pump good, luke warm heat, 1988


check the temp of the heater hose going into fire wall,make sure they are both the same temp,if they are replace the thermostat.
if one is hot and the other is not,the heater core is partially block and will need blowed out with air hose or replaced

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1 Answer

Luke warm heat


You may need to replace your thermostat. Also while you are at it flush and fill your cooling system.

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