I need some advice on adding freon to a dehumnidifier. Which side should I add it to, the low side or the high side? How do I tell one side from the other? Can I use 134a like I put in my car's airconditioner?
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Re: Can you add 134a freon to a Dehumidifier?
Why do you want to put gas into your dehumidifier????????. this only needs to be done if there has been a leak and in that case you need to cure the leak first. you should use a vac pump as well to clear the charging line of gas. ideally, you should degas the appliance first and charge with the correct amount of gas.. the type of gas you need should be on the rating plate and is not necessarily r134a. gas goes in on the low pressure side and for this you can use either the charging stub (piece of pipe which is blanked off) or the low pressure pipe which is the larger diameter pipe of the other two. any refrigeration needs the correct amount of the correct gas.
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If your system is blowing warm I would recommend having the system evacuated and check for leaks. Just adding Freon will not give you ice cold A/C. There are two valves, low side and high side. Usually the plastic caps are blue for low side, red cap for high side. If you use a commercial A/C machine to service the vehicle, both valves are connected to check pressures in the system and also to fill the system with the correct amount of Freon. The low side (blue) is located at the firewall near the dryer and the high side (red) is usually on the passenger side near the radiator.
Looks like low Freon. Not enough info. Cheap answer: Walmart has 134A Freon with a dye in it plus a special flash light. Make sure you hook up to the low side to add the Freon/dye. Suggest you do this at night for better visibility. I think it's a very slow leak as it starts out cold first. Fix the leak, don't just add Freon as it will just reoccur. .
Adding freon to a car requires connecting the low-side service valve first, followed by the high side, recovering the existing freon, evacuating the system of air and recharging the system with new freon. You can use R-134a refrigerant for 1998 Ford Explorer. You can get all parts necessary for Ford Explorer at one place at http://www.carpartswarehouse.com/carparts/Ford/A-C_Condenser.html
The system could be low on refrigerant. The A/C pressure switch will not let the compressor run if the system pressure is below 28psi or above 455psi to protect the compressor from damage. At low pressures not enough oil (mixed in with the refrigerant) will circulate, and at high pressures, the compressor seals will likely blow. You can get a set of A/C manifold gauges for R-134a and check the system pressures yourself or get a shop to check it and possibly add some R-134a. If the system pressure checks good, then the A/C pressure switch, the compressor clutch, or some relays will need to be checked.
freon is added to the low pressure side. The adaptor will only fit this connection, the high pressure connection is a larger connector. You shouldn't just add freon without checking the high pressure side - you can still overpressurize the system, and this will cause your compressor to kick-off on high pressure.
Get an r134a refrigerant add kit from Walmart or your local auto parts store.
You can even get a can of Arctic Freeze by Intermatics that has a hose and a gauge on it.
Connect the hose to the low side port. You can find this port on the 'thicker' piping that comes off of the compressor (versus the thinner piping that comes off the compressor which is the high pressure side).
Pressure should read 25 psi to 45 psi on the low pressure side when the compressor is running and the a/c is on.
Pressure should read 75 psi to 100 psi on a hot day when the car is off.
However, you'll want the a/c to be running when you add freon.
Press the button on the can to install more freon, if needed.
What I would try first is recharge the a/s system, your car came with R12 freon, that type of freon is impossible to get these days, so you will need a retro fit kit to convert it to 134A freon, the kit will have two 134a fittings that screw on to your R12 port, so that the 134a recharge hose will go on, the low side will be the one your add freon through, it will be the thinker hose of the two, the thin one is the high side stay away from that one, you will also need one can of freon (134a), if it works, it might work for a while till the freon leaks out again, then you will have to take it it for repair, but this way you know it's just a leak and every thing else works.Good luck, let me know if I can be of more help.