help: fan blowing hot air 24/7...

[aznpoopy]

95 240sx

shit is blowing hot air 24/7
when i set it to hot, its scalding hot.
when i set it to cool, its noticeably hotter than ambient.

i checked the valve thinger on the heater hoses coming out the passenger side firewall. it moves when you move the slider. just to be sure, i also checked the motor down by the gas pedal. it's working as it should.

additionally, my A/C seems to have lost charged at the same time. it was working just a week ago. i recharged this ish not even a year ago.

there's an exhaust leak on piping under the manifold. i have a replacement part coming in, but could that be contributing to the problem? heating up some related hoses somewhere?

i also replaced the passenger side heater hose under the valve thinger. i bled the car using the jack the front up, fill from rad method. heater was on full hot with the fan going. do i still have air bubbles? would it cause this?

anyone have any ideas? im sweating my balls off here.

edit:
http://www.zilvia.net/f/showpost.php...00&postcount=3

reversed heater hoses = hot air 24/7. perhaps this is my problem?
i've been running it like this ever since i did a ka swap. is it possible its been on reverse this whole time? O_o