[bswitzer85]

Hi, my goodman ac is not cooling. THe suction and head pressure were both about 120. When i put refrigerant in my suction line it barely registers in my liquid line and vise versa. Am i supposed to put refrigerant in both lines? or just the suction. I am using vapor not liquid when charging. Could it be my metering device? :sweatdrop:

 

[user_12345a]

First thing -> see if the compressor is actually running. If you have a clamp ammeter, check the draw on the common wire going between compressor and contactor.

If it is running and the pressures remain equal, there's a mechanical failure. Even with no metering device, there would still be a pressure difference produced by the compressor pumping refrigerant around.

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answers to other questions:
Just suction with the machine on.

410a has to come out of the cylinder as a liquid and be flashed into a gas, as it's a blend.
r22 is one component and can come out of the cylinder as vapor.

hoses must be purged before adding or air gets into the system.

120 psi standing pressure leads me to believe it's a r22 unit unless it's cold outside.

Remember that if it's low on refrigerant, there's a leak and the solution isn't just to top it off.

 

[roughneck]

How do you know it’s low on refrigerant?
If so, where is the leak?
It doesn’t sound like the compressor is running.

 

[bswitzer85]

the compressor is running i can hear it, but i havnt checked the amp draw

 

[bswitzer85]

yes it is an r22. the leak was in the schrader and i fixed it. it got low and the lines got real hot, but i cant get it back up. when i put refrigerant in the suction side goes up but it take forever for it to register on the liquid line. is that normal?

 

[bswitzer85]

also its the same when i try to charge it through the high side. i charged it a lil after it cooled from the lines getting hot and they are not getting hot any more, but the suction line isnt getting cold at all

 

[user_12345a]

yes it is an r22. the leak was in the schrader and i fixed it. it got low and the lines got real hot, but i cant get it back up. when i put refrigerant in the suction side goes up but it take forever for it to register on the liquid line. is that normal?

this is not the time to try adding refrigerant. to add refrigerant, the suction pressure has to be below the pressure in the tank.

the standing pressure is determined by temperature. 120 psi r22 = 69F - what's the temperature outside?

the compressor likely isn't pumping properly if at all. is this a heatpump?

It's never done through the high side with the machine running, it may be best to study up on the theory a bit more or just call a tech.