MY AC IS BLOWING HOT AIR ONLY. also the ac light does not come on

If the ac light doesn't come on I suspect the switch is not getting power, check fuses and relays but keep in mind ac systems are complicated and need special tools to fix and really is beyond the scope of anyone at home because it needs pressure gauges and evacuation and leak detection tools. a wiring diagram would be the first thing to look at to see what fuses are in the circuit and electrical side of things is the simplest thing any of use can do at home. Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

I am hearing a noise soming from the back of my nissan 94 pick up 2.4L it seems it is coming from the gas tank. What di I do? The trusk is running great.