Hi all, so I've been having this issue for a while on my 2000 wrangler, I'm not getting any airflow coming out of any of my vents only when it's teens and below outside otherwise the whole system works flawlessly. I can see and hear the fan spinning at all different speeds, I can see the actuators opening and closing, and I can feel heat coming through the vents. What could it be??? please any suggestions? I'm sick of being cold!! haha
I'm a bit confused by your description of symptoms. You say no air, but you feel tepid heat coming out of the vents?
If your engine temperature is normal, and the fan and actuator are working properly, I would suspect an obstructed heater core. At operating temperature, grasp the core input and output hoses. If there is a marked difference in warmth, coolant is not circulating properly.
When you change to mode (face, feet, etc.) can you hear the doors moving? If you can feel temperature change when you move the hot/cold dial then the blend door(s) works. But no flow from the vents would be a mode door problem. You also say the fan works fine at any speed?
Originally Posted by mrblaine
Being right has nothing to do with arrogance. It's only perceived that way by those that are wrong.
Yes I can feel tepid heat coming from vents, and I can hear the fan spinning at different rpms when selected. The weird thing is that it only does this when it's really cold outside when it's warmer it works fine.
well when its warmer... it dosent need to heat up air as much, when colder it takes more heat to heat up that colder air... kind alike summer your engine hits operating temp fast.. in -40 takes a few minutes more lol , so it sounds as heatercore is blocked up, can try reverse flushing, then last replaceing the heatercore..