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Re: 2003 dodge grand caravan ac recharge
You should be adding the 134a to the system the low pressure switch is doing its job by not allowing the compressor to kick on, it wont kick on until there is enough 134a in the system to be above the preset pressure for the low pressure switch.
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Hi, the low side port is located on suction side near compressor , it can be identified as the larger of the two lines from compressor. Using eye protection and gloves hook can to hose, hook hose up to port , open valves, crank engine , turn on AC.
This could be a few things. The freon could be low, one of the switches (high or low pressure) could be bad, or you could have a bad compressor clutch. You can test the clutch by checking for battery voltage and ground at the two pin connector with the A/C on if you have both power and ground, then the clutch is bad. You really should start by hooking up pressure gauges to the A/C ports to check the pressures, and these vary depending on ambient temperature and whether the A/C compressor is engaged or not. I am willing to bet that the freon is low though and may be just as simple as recharging the system.
Hope this helps. Good luck!
The 1998 Dodge Caravan ac should be charged at the low pressure service port. This port is located on the suction line near the compressor. The suction line can be identified by it's size, it being the larger of the two line connected to the compressor. You must purchase a recharge kit at your local part store, which should include charging hose with pressure gauge and a can of R134a freon. Gloves and eye protection should be worn during servicing.(freon can freeze your eyes and cause frost bite to your hands). Connect freon to charging hose, connect charging hose to low pressure service port, open valves and start engine, turn on ac. If compressor won't start it may be required to disconnect the low pressure switch and jump out the connector.
You need to have it leak tested and recharged. There's a low pressure switch that won't alow the compressor clutch to engage when there's a leak. If the compressor clutch was engaged without refrigerant and oil circulating it would seize. Don't be surprised if you need a new condenser. Don't use those leak sealer recharge kits as they can do more harm than good, and some AC shops won't touch a car after someone uses leak sealer. They claim there's a different mix of gases in the refrigerant (usually propane) and they can't recycle it, and they don't like customers complaining when the AC doesn't work when it was the leak sealer clogging things up.
Check the fuses/relay for the compressor. If good, bypass the pressure switch. If the compressor comes on, there is too little internal pressure. Have the system evacuated and recharged. If the compressor does not come on, it could be bad.