Pretty common problem. Usually caused by failure of the Totally Integrated Power Module. See this post on the fix
http://ricksfreeautorepairadvice.com/jeep-horn-blows-on-its-own/
http://ricksfreeautorepairadvice.com/jeep-horn-blows-on-its-own http://ricksfreeautorepairadvice.com/jeep-horn-blows-on-its-own
How to Fix Car Horn
Try this site to fix your problem
https://www.youtube.com/watch?v=vWDcT_4rgaw
SOURCE: 2005 Jeep Liberty Horn wont shut off
wiggle the horn on the colum if it stops then the spring on the horn pad has gone bad
SOURCE: Jeep Liberty Air Conditioner not blowing out air
out off freon. bad ac clutch. or bad switch on dash.
SOURCE: My 2003 jeep liberty only blows hot air. Even
have the gas checked out first before you start playing with it ,it should hold about 700grms of gas minimum
SOURCE: my 2003 jeep liberty's air conditioner blows hot
Probably, to be sure make sure the compressor is coming on. With the engine running turn on the ac and watch the rpms, they should drop for a second if the compressor is coming on. If so you just need to recharge, the refrigerant is R-134a, which you can get from your local parts store along with the kit needed to charge it. The kit will come with detailed instructions and is a pretty easy job.
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