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Ihave 2003 mercury grand marquis le heater bloew

Ihave 2003 mercury grand marquis le heater bloew blows but only cold air comes what is the problem neesd help

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  • ajoel122094 Nov 18, 2009

    thank you iwill try to find out you guys are great.

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  • Honda Master
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Check to see if both heater hoses are hot to the touch,after the engine is at normal operating temp.If they are,then the temp door actuator is bad.This is a little flat motor that opens,and closes,and adjust the temp door.It will be in the dash,most likely under the dash on top of the vent box.The dash will have to be removed ,and pulled back towards the seats to gain access to the actuator motor.I hope this was helpful,and if the heater hoses going into the fire wall,into the cabin,are luke warm,then remove the heater hoses and flush the heater core out,with a water hose.If this was helpful,at all,please let us know,thank you.

Posted on Nov 16, 2009

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