F250/F350/F450/F550 Super Duty Defrost stuck on? Quick 2 min fix. 

I don't think i could rock any other Diesel

I've never seen that problem before. But it wouldn't hurt to try. If it don't work it could be I. Your control panel or your air duct is not operating properly. That would be on the bottom of the dash on the passenger side. Let me know what happens.

I would have to look again, but I believe the red line goes to you controller.

It will be that same. Your defrost still runs one an air pump.

@@marshall32781 that other part the solenoid is only on 4wd though right I don't see one on mine?

@@nateoglesbee7341 it should be there. It's your air pump solenoid. 4x4 or non 4x4 your air controller runs on vacuum air. It should be in the right corner panel. With 2 wire plug.