The front air conditioner on my 2003 dodge grand caravan has a small leak that the dealship says is under the dash. Can I just put a charge on the front unit the back unit blows cold air. Is this something I can do myself? The last time I took it to the dealship they charged me $300. to charge it.

The drain tube on fire wall plugged up find it blow air in it in small bursts the debris should come out

Well the hissing sound could be a vac leak or the freon flowing thru the system.
Someone needs to check the freon charge in the system with a gauge and the electrical circuit to the compressor clutch.

I suggest check drain clogged, this generally is located under dash carpet.

J, I am sending you some info to read but it appears that the most likely cause is the blower motor relay. Give the following notes a read and if you need some more help give me a buzz... Best of Luck..

1996 Chrysler Town & Country 3.3L, Vin R 1996 Dodge Grand Caravan ES 3.8L, Vin L 1996 Chrysler Town & Country LX 3.3L, Vin R 1996 Dodge Grand Caravan LE 3.8L, Vin L 1996 Dodge Caravan LE 3.8L, Vin L 1996 Dodge Grand Caravan SE 3.3L, GAS, Vin R, Eng Cfg V6 1996 Dodge Caravan Sport 3.3L 1996 Plymouth Grand Voyager SE 3.3L, GAS, Vin R, Eng Cfg V6 1996 Dodge Grand Caravan ES 3.3L, Vin R 1996 Plymouth Voyager Rallye 3.3L Customer Concern: Front blower does not work; no power to it. Fuse is OK. Tests/Procedures: 1. At the blower motor, there is a Dark Blue wire. This wire should have battery voltage whenever the key is in the "on" position. Power for the blower motor comes from the blower relay.

2. Access the front blower relay, it is located on the driver's side under the dash, near the junction block. There will be four wires going to it. The Dark Green wire should have battery voltage all the time. The Dark Blue wire is going to the motor. The Black/Orange wire should have battery voltage with the key in the "on" position. The Black wire should be grounded at all times. On this circuit, the relay is energized whenever the key is in the "on" position. Potential Causes: Front Blower Relay
Front Blower Relay Wiring
Heater Ventilation Air Conditioner (HVAC) Control Head
Tech Tips: The front blower relay is located under the dash, on the driver's side. It may be necessary to remove the junction block (fuse and relay box) in order to see it. Diagnostic Codes: None

Sounds like you need to replace the cabin air filter. Here is a link to a page that shows you that this filter is located up under the dash behind the glove box. You do not need to remove the glove box. Just look up under. You will see it. Visit this web site. Dodge Grand Caravan cabin air filter location From year 2001 2002 2003...

this is called condensation from the heat vaporator as the acc is cooling the car inside the heat is taken out from the inside of the car ice form s on the vaporator and the blower fan melts the ice

Should say accessories or Power ! Also may be burnt out itself!! Also look for a burnt out fuse!!SWAMPRATT200!1aaaeee!!!!

sounds like you have a refrigerant leak. you should charge the system up and check for leaks. all fittings, the condensor, the evaporator, and all the lines

i have a 2002 caravan and the turnsiginals are only working inside the dash nothing outside has new bulbs and still nothing anyone any ideas?

I have a 2002 Grand Caravan and it is located behind the glovebox. It may be in the same place.