My durango heater works as in the blower and stuff but the heat coming out is minimal and just enough heat to keep ya from freezing to death,, and really cold weather no chance its enough to keep the windows defrosted,, ya totally have to dress warm while ya drive in it
only time it has ever improved by 50 % is when a guy bled the air out of the radiator and bubbled the air all out and there was a alot in there and after it was better for about 10 miles maybe then back to barely enough
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Back flush out that is disconnected and connect mains hose to heater and power out keep revers flushing don't use Cir on alloy but u can get central heating flush that will work its called FERNOX system cleaner very good us this i system first run to work a few times then drain then reverse flush good luck iv used it very good
Check to make sure the coolant level is full.
Make sure the thermostat is working, you temp gauge will read low if it is not.
Most likely the heater core is plugged, very common on the durangos.
You can have a service done to the heater core called back flushing. It may not be a bad idea to flush the cooling system at the same time especially if it has never been done.
If you get more heat after the flush drive for a week or so and then have it flushed again. If the heat is now adequate you just saved yourself 5 or 6 hundred dollars. If the heat is still not good than you will need to replace the heater core.
It is located very near the blower motor,the blower motor keeps it cool,it has multi wires going to the connector on the blower resister,and mounts on the blower box,but actually goes inside the blower box
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.
The blowers ion the back have there own blower motor. The front has it's own. The resister controls the range the blower motor runs on,( low, medium, high). If the blower motor is not working it may be the motor itself. Was the fuse checked:?