Question about Cars & Trucks
Sounds like clogged louvers. this usually happens when leaves and dirt from the road go down the breathes under the hood above the fire wall. most of these are hard to get to some you can run a vacuum down and get most of it out, alot of it gets between the doors in you ac switch overs and block them from going from closed to open and viser verser. This can be played with but best done by a professional mechanic. Stinks paying those high prices but in the long run if you know an honest mechanic he may cut you a break in the price is its not to much trouble to fix.
Posted on Jun 14, 2014
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Posted on Jan 02, 2017
SOURCE: a/c problem
You either have a bad control, or motor running the air direction door in the front HVAC unit, or a door that is stuck.
The front and rear units are totally separate.
The door directs where the air, cold or hot, should come out, whether it is panel vents, floor, defrost, or any combination of those.
This door and motor are located inside the heater box which usually requires a lot of the vehicle dash assembly to be taken apart to get to these parts.
Posted on Aug 28, 2008
SOURCE: 2000 expedition heat problem
first of all I would make sure the car has proper amount of coolant and you are right it is very possible you have an air pocket in the system also ask your self did you change the thermastat after you did the heater core when the car is cold make sure there is coolant at the cold mark on the reservior bottle because you might not have enough coolant then start the car and get it up to temp and if the coolant goes not go up to the hot mark when the car gets to temp you do not have enought coolant just keep adding coolant and you will see the bubble after the thermastat opens
Posted on Jan 12, 2009
Make sure the heater core is in the open position by using the shut off valve and turning it to open. next, you may have a malfunction in the direction door the directs the air flow in the dash. a lever may have become lose or separated. may be a bad servo motor not directing the door to move to the heater position. i would start by checking that shut off valve first on the heater core.
Posted on Mar 13, 2009
TRY JUMPING THE BLOWER MOTOR APPLY 12 VOLTS TO THE MOTOR IF IT STARTS THEN THE PROBLEM WOULD BE THE SWITCH IF IT DOES NOT START THEN THE MOTOR IS THE PROBLEM GOOD LUCK HOPE THIS HELPS
Posted on Jun 25, 2009
you have a vacuum loss to the ac control head, the motors that divert air are vacuum operated, if you loose vacuum the system goes to defrost for safety reasons, the vacuum comes from the engine, then goes o a plastic vacuum tank under the hook start there, it is a 3/16 id hose.
Posted on Aug 14, 2009
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