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Sounds Like The Themal Switch Is Stuck On Or The Fan Relay Is Stuck In The On Position ,
Try Removing The Fan Relay .
Listen To Hear a Clicking Sound When Plugging In And Out The Relay
If You Do Then Check The Thermal Sensor .
If You Unplug The Sensor And The Fan Goes Of With The Engine Cold Then That Is Your Fault
Hmmm, I would think if you are hearing that click that the blower relay is good. The switch seems to be working also from whatv you have posted. I would bet that the blower motor resistor or the wires to it have a problem. Check for an overheated crystalized wire, usually the highest speed wire, and if the wires and connections are good then the resistor needs replaced.
I have exactly the same problem. Keyfob will unlock the doors, but will only arm the alarm once the doors have been locked manually. Central locking button on driver side door no longer works, but I hear the clicking sound you're referring to. I took it to a mechanic, and he seemed pretty sure it was a bad master window / door lock switch. The price he quoted to replace it was $255 plus tax, and I could never bite the bullet and pay for the work, so I've just been living with the problem. Have you solved your situation yet?
Sounds like the AC relay/switch is sticking on sometimes. Locate and swap this relay. Look at your fuse box lids for location or search online for the exact location. You also might have a leak in the ac lines or the AC condenser clutch is not engaging to kick the ac on. You should feel a slight power loss or hear a slight stutter in the engine when pressing your AC switch. This means everything kicked on. It's a millisecond before the ECU realizes this and kicks up the idle to compensate.
The pontiacs have an issue with the ignition switch, I have a 2001 grand prix that did the same. The ac fan would only work on 5 and the headlights would go off if on 1-4 replace the switch and all is fine.
sounds like an "open circut to me. check for loose connections at the blower motor, blower motor resistor, and blower motor switch, you may have to tap each one several times to produce the railroad effect
Certain circuits go through the ignition switch and sometimes the points in the switch become gummed up with carbon. The easiest fix is to replace the ignition switch. The switch can, however, be disassembled and cleaned by a skilled mechanic (there are many small springs and parts that have to be assembled properly).