![]() However, even with an accumulator in the system, a small amount of liquid enters the compressor. ![]() Depending on the type of system in your car, the gas exits the evaporator and goes into either an accumulator in an orifice tube system or directly into the compressor in an expansion valve system. That’s not the way to do it!!! Here’s why AC compressors can’t compress liquidsĪs refrigerant flows through the evaporator in your dash, the heat causes the refrigerant to boil and change from a liquid to a gas. If want to jump a low pressure switch to add refrigerant to your car AC, think again. That can easily cost you well over $1,500 to repair. It can damage your compressor in a way that throws shrapnel throughout your AC system. But if you leave it connected too long to try and recharge the system, you risk serious and even catastrophic compressor damage. In other words, you can jump a low pressure switch in a car momentarily to make the AC compressor clutch engage for testing purposes ONLY. ![]() Low refrigerant charge = low or no oil circulation. The low pressure switch cuts off compressor specifically to prevent compressor damage due to oil starvation. That’s because the refrigerant carries the lubrication oil throughout the system. Would you knowingly drive your car with no oil in the the engine? Well, that’s what you’re doing if you ump a low pressure switch. R134a and R1234YF have different low pressure port types, so you should never use a recharge adapter to add the wrong type of refrigerant.Repair Topics > Air Conditioning Symptoms and Repair > Compressor Clutch > Jump a low pressure switch Jump a low pressure switch When it’s ok to jump a low pressure switch There’s only one reason to jump a low pressure switch You cannot add R1234YF refrigerant to a R134a system nor can you add R134a refrigerant to a R1234YF system. There is an AC sticker in the engine bay of your 20 that indicates if it requires R134a refrigerant or the newer R1234YF type to do a recharge. What type of refrigerant does a 2009 Dodge Ram 1500 use? Air conditioning systems can vary so it is critical that you check the sticker in the engine bay to determine your Ram 1500 refrigerant type. Typically the AC recharge kit you buy will have enough capacity to add enough freon to get the AC in your Ram 1500 to blow cold air. In addition to cooling, freon lubricates the compressor when it runs. When your compressor kicks on, add freon to the correct pressure. Once you find the 20 AC low pressure port cap, hook up the can of refrigerant to the low pressure port. How do you recharge AC in a 2009 Dodge Ram 1500? The low side AC port location is the first thing to find when you are looking for how to put freon in a car. If there is a problem with your compressor or evaporator, adding freon will not restore cooling. The A/C system in your Ram 1500 consists of a compressor that is belt-driven, an evaporator and freon. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a freon. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. When the air conditioner in your 2009 Dodge Ram 1500 starts blowing hot air, you likely have a freon leak.
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