I not sure if it does the same thing while using heat. Because I put it on defrost for heat anyway. All I know is it cannot make it blow in the same place. I move the air position switch to a setting and get something else or something new. My Jeep is haunted and I tired of driving a hot $30g Jeep.
When I can get it to work, I will run the jeep for a few minutes going down the road and set the fan to low and then set the air to regular air vent and let it set for a few seconds and then slowly move up to max cold air. Then set the fan to max. If it is not to hot out , it will work. Then most of the time if I am doing 70 plus on the freeway, it will cut out to defrost till I slow down.
2002 4.0 Sport, 5-spd, Dana44 w/ Detroit Electra Locker, 4.5" R.E.- L A Lift, Old Man EMU Shocks,TrailMaster steering Stab, 5 Hellcats 10x15s, Good Year MT/R 35x12.5s,Warner Frt bumper/grill guard, Warner 9500TI winch, Tomken Rear Bumper and Carrier, Tera 4to1, SYE + CV drshft, Tomken Rock Sliders, , KC Titanium Lites