heat issue
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heat issue
so ive been having a heat problem with my 2000 durango, 4.7L, whenever i have the heat on it never really gets hot. it gets lukewarm at best, checked all my coolant lines and they are all good, even replaced the tstat for ****s and giggles, theres the coolant line going into the heater core is hot and the one coming out is hot. im thinking its possibly the blend air door, anyone have any other ideas on what it could be? and also where is the blend door located at under the dash on these....thanks
If I remember correctly the blend door is connected to the blower motor? Please tell me if I am wrong. If so, these are the instructions to removing the blower motor, which obviously following these will get you to the blower motor:
NOTE
Removal of the blower motor on these models requires that the A/C lines be disconnected. According to law, refrigerant must be captured and reused which requires the use of special equipment and training. This procedure MUST be performed by a certified MVAC technician. Or so Chilton says!
Disconnect the battery negative cable.
Remove the instrument panel.
Recover the refrigerant. See "Note" above.
Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
Disconnect the accumulator inlet tube.
Drain the cooling system.
Disconnect the heater hoses from the heater core tubes.
Remove the four nuts from the heater–A/C mounting studs on the engine compartment side of the dash panel.
Remove the nut that secures the heater–A/C housing mounting brace to the stud on the passenger compartment side of the dashboard.
Pull the housing rearward far enough for the mounting studs and evaporator condensate drain tube to clear the dash panel holes.
Remove the housing from the vehicle.
Remove the three screws that secure the motor to the housing.
Remove the wheel, if desired, by removing the clip from the motor shaft.
Installation is the reverse of removal. Note the following points:
When installing the wheel onto the shaft, be sure to line up the flats.
The ears of the retaining clip must be on the shaft flat.
Be sure the blower motor seal is in place.
NOTE
Removal of the blower motor on these models requires that the A/C lines be disconnected. According to law, refrigerant must be captured and reused which requires the use of special equipment and training. This procedure MUST be performed by a certified MVAC technician. Or so Chilton says!
Disconnect the battery negative cable.
Remove the instrument panel.
Recover the refrigerant. See "Note" above.
Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
Disconnect the accumulator inlet tube.
Drain the cooling system.
Disconnect the heater hoses from the heater core tubes.
Remove the four nuts from the heater–A/C mounting studs on the engine compartment side of the dash panel.
Remove the nut that secures the heater–A/C housing mounting brace to the stud on the passenger compartment side of the dashboard.
Pull the housing rearward far enough for the mounting studs and evaporator condensate drain tube to clear the dash panel holes.
Remove the housing from the vehicle.
Remove the three screws that secure the motor to the housing.
Remove the wheel, if desired, by removing the clip from the motor shaft.
Installation is the reverse of removal. Note the following points:
When installing the wheel onto the shaft, be sure to line up the flats.
The ears of the retaining clip must be on the shaft flat.
Be sure the blower motor seal is in place.
THE ULTI-MOD
Joined: Jan 2007
Posts: 19,797
Likes: 36
From: Union NJ
i dont think the blend door is connected to the blower motor, however it is in the dash so not at all easy to get to
EDIT: confirmed by the FSM, no connection btwn the blower motor and the blend door http://www.mediafire.com/?zaxjntgzj2m
from the FSM
follow the link above, dl the PDF and follow the removal/dissasembly instructions which begin on page 54
EDIT: confirmed by the FSM, no connection btwn the blower motor and the blend door http://www.mediafire.com/?zaxjntgzj2m
from the FSM
MECHANICAL PROBLEMS
Possible locations or causes of insufficient heat:
• An obstructed cowl air intake.
• Obstructed heater system outlets.
• A faulty, obstructed or improperly installed
blend-air door.
• The temperature control cable is not connected,
or is not routed or adjusted properly.
• A faulty blower system.
• A faulty heater-A/C control.
heater-A/C control panel, the following could require
service:
• A faulty heater-A/C control.
• The temperature control cable is not connected,
or is not routed or adjusted properly.
• A faulty, obstructed or improperly installed
Possible locations or causes of insufficient heat:
• An obstructed cowl air intake.
• Obstructed heater system outlets.
• A faulty, obstructed or improperly installed
blend-air door.
• The temperature control cable is not connected,
or is not routed or adjusted properly.
• A faulty blower system.
• A faulty heater-A/C control.
heater-A/C control panel, the following could require
service:
• A faulty heater-A/C control.
• The temperature control cable is not connected,
or is not routed or adjusted properly.
• A faulty, obstructed or improperly installed
Last edited by shrpshtr325; Jan 5, 2012 at 10:51 PM.
