heat stuck on defrost
#1
heat stuck on defrost
So... My 99 ford ranger V6 3.0 L 2x4 had an issue with the heat only being on if the fan was on the highest setting. So i looking into it and heard its probably the resistor box. So i thought it was under my dash. I took out this white thing under my dash thinking it was the resistor box, it was actually the diverter to select which fan setting i wanted. So i put it back but no i only have defrost nothing works. i tryed watching the motor work and when i plug it in to watch to see if it moves when i switch settings it doesn't. When i plug it in it just trys to rotate completely one direct. If i dont have all gears in place the motor will just constantly run. Please someone help me?
Heres a picture of what i took out
Heres a picture of what i took out
#3
#4
#5
yeah i saw the white and black cable... but why the hell doesn't it randomly work, the only thing i did was take out that white box... the white box has a gear hooked up to something that like spins, seems like it would change where the air is coming out when u flip the switch... any ideas?
#7
"Resistor box" or blower motor resistor is under your hood in the hvac box to the lower right of the blower motor.
The box you have is the blend door actuator. It turns a door that that blends the air from the evaporator core (cold air) and the heater core (warm air) to give you the desired temperature.
The reason is goes to one side when turned on is because it is a servo style motor. It does this to know its movement range when first started up. The reason the motor keeps running when the gears are removed is because it has moved the rod to the desired position. This is a feed back system. When you turn the temperature **** it powers the motor until the actuator rod is in the current position (basing its readings off of a potentiometer.) When the rod gets to this position it cuts power to the motor.
The box you have is the blend door actuator. It turns a door that that blends the air from the evaporator core (cold air) and the heater core (warm air) to give you the desired temperature.
The reason is goes to one side when turned on is because it is a servo style motor. It does this to know its movement range when first started up. The reason the motor keeps running when the gears are removed is because it has moved the rod to the desired position. This is a feed back system. When you turn the temperature **** it powers the motor until the actuator rod is in the current position (basing its readings off of a potentiometer.) When the rod gets to this position it cuts power to the motor.
#11
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vsromero
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05-30-2012 03:36 AM