Who to added R22 freon to my a/c condenser unit and what hose on my gages need to be connected to hight pressure and lowe pressure

It could mean you are overcharged and that somone tried to resolve the real problem by adding refrigerant (R22).

Unplug the ac unit and let sit for 30 minutes to a hour..... Wear safety goggles and gloves... BE CAREFUL IF YOU ARE NOT LICENSED TO DO A/C SERVICING!
Buy a saddle valve and attatch it to the low line, suction line which should be connected to the compressor....
Buy a set of guages and attach the guage hose to the saddle valve and see if the pressure reads out correctly (the psi pressure level should be written on the side where the model number is and if it's low or empty, then continue with the refilling process...
Buy a jug of R22 ac freon and fill it to the correct low psi...
I recommend that you change the thermistor first to see if it's bad and causing the problem...
Be careful...
Be careful...
Be careful...
Be careful...
The lines are under pressure!


Hope this works out for you...

unless you are licensed to handle freon don't. there are some big fines for releasing freon. also if you are not experienced there are safety concerns!!! Is this a home hvac or car? Now with that said you have to add it on the suction side of the compressor.You will need to know the correct type of freon that goes in your unit which can be found on a tag on the unit. You will also need a set of ref. gages to monitor the low and high pressure sides of the unit. it also needs to be added to the outside unit service ports (Home). You need a set of ref scales so you know how much ref is being added. Too much ref and you start pumping liquid. Too little ref and it doesn't cool like it should. If its a car you still need the above equipment. still goes in the suction side.If you add to much ref you can lift the safety pressure valve and dump the freon in the car system. Each type of ref has a pressure you want to see on the suction side and hp side. since they differ with each type ref. you will have to look it up possibly on the internet. If suction pressure goes below 32 degrees you may freeze any condensate the unit makes and have another problem. Hope this helps you but its not as simple as hooking up a ref cylinder and just adding freon. their are many thing that can go wrong and damage equipment or hurt yourself.safety is the first priority.

If you have a set of gages all you have to do is hook up to the ports. Blue gage / line to the large tube. Red gage / line to the small tube. Hook up ports are usually right at the bottom of the unit where the tubes connect to the unit. On some, the ports are inside the unit in which case you have to remove the access panel in that location. First, clean the outside coil, you can use a water hose with not to much pressure and wash out any leaves, dirt, old grass clippings. Wash out the coil fins and pay attn. to the bottom area. The best way, to make sure your unit is full of freon, is to check the temp of the large line at the unit (while it is running w/ max load across inside coil) and check the saturated refrigerant pressure, looking for a differential of 15 to 20 dges. OR With a clean coil, running with about 225 psi on the red gage, you will want about 65 to 70 psi on the blue. These numbers are just for referencing only.You really need to check the temp. of the suction line and using a saturated R22 pressure to temp. chart. (found at any local refrigerant supply house) adjust pressures and temps until a desired temp. is achieved (15 - 20 ) called super heat at the compressor suction line. Hope this helps Fix Ya up.

After the ice melts and you turn on the unit and your fans work the problem is your unit is low on freon normally R22 you will need to have someone who is licensed to fill it and ck for leaks. If your fan does not run replace fan first if fan runs but low air flow thru condenser or evap coil clean coil first. good luck i believe your unit is low on freon more than likely.

the red hose connects to smaller line...usually 3/8's....the blue connects to larger that has black insulation. The yellow to tank of freon. The unit must be running to put in blue hose. If unit nit running put in red hose. Must be done by someone with EPA 68 license

You connect your blue hose to the low side (fat cool copper) The smaller lines is high side (hot side). Your yellow hose will connect to the jug.You want 70 PSI on the low side (no more 68.5psi is ideal) Your coils needs to be reasonably clean. If the compressor seems a bit loud you could clamp on an ammeter and check the amp draw. In fact you could charge the unit using an ammeter. Check the plate for total amp draw and reach for it. More sophisticated methods for checking sub-cooling and superheat are explained HERE
A cool from Professor Zarkalicousness:




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Problem number one.

condenser fan won't come on. solution check the capacitor if good ohm out the fan to see if it is bad. If bad replace fan motor with new one.

2. compressor will not come on. solution check the contactor to see if engaging this applies to problem 1 also. If engages check the capacitor on the herm side if it is bad replace. If good check compressor to see if the compressor is bad. Should it be bad replace compressor.

3. High head pressure not cooling properly dirty condenser coils. Clean coils. With hose and water.

4. Low head pressure frosting accruing on suction line. Check freon levels. Also check inside air filter for being dirty.

5. Condenser unit is failing to come on. solution check the power source check the contactor should the main power be bad check main breaker and replace any slow blow fuses that are bad. Should the contactor be bad check transformer to ensure 24 volts going to secondary side on contactor. Inspect the two wire going to outside unit condenser. replace any broken wire any bad transformer or bad contactor.

You will need gages and temp meter to add refrigerant plus R22. Flare cap on large is the suction low side line. Put low side gage on there. Start unit .Your suction pressure should read about 70 to 75 if the house is very warm. Add refrigerant until this pressure is reached. You need to read the temp of the large line. It should not be below about 54 degrees. Normally. If you have not done this before be very careful to much freon will damage compressor. You have a leak somewhere if you have to add gas. Make a note of how much you add and when. Gives a base line to go by. Rusty

Outside in the condensing unit you'll see the two copper pipes coming from the valves in the condensing unit. atach the hose from the high pressure gauge to the port in the smaller copper pipe (liquid line) and the other hose to the port of the other line (suction line) in there you check the low pressure (68psi) and if is low you can rechrge it, in the high side you should have no much more than 250psi .This pressures are for R22.