Check your vacuum lines, this is what opens and closes the ducts. I had the same problem with mine. I just got it fixed a few days ago. The problem with mine was the compressor was leaking. Also i had the lines replaced, because they were sucked pretty much flat. To fix mine it was about $700. Wish i would have known that before I got it fixed.
You have a short in the cluster.
Your climate control in your 1998 Ford E250 Cargo Van blows cold air when in heat position and sometimes it blows warm air when in the cold position?
I hope you checked the fuse.
it could be your thermo stat
the blower control switch pulls out
Bad switch, bad wiring, ECM fault. If your jake brakes still work, you can rule out the accelerator position switch. The brake position switch might be reading that the brake is depressed when it isn't.
The fuse for the cruise control on a 1998 Nissan Sentra is at the Number 22 spot in the fuse box. This is a 10 Amp. fuse that also controls the horn and steering switch. if the horn still works, check the speed sensor on the transmission or the cruise control module on the carburetor.
Compressor not running? Check fuses, check switch
The a/c compressor runs off a relay switch. Look in your owner's manual to find the location of the switch and replace if necessary.
MaybeYou may have it on "auto" not off check all switches off You may have a faulty selector switch. Also some vehicles always blow heat even with the heater off.
The cast of The Wind Blows Towards Me Particularly - 1998 includes: Fadia Nadda
sounds like you need a new control switch or condenser