York central AC not working right.?

If you aren't satisfied with the company servicing your a/c, then call someone else. A frozen coil is a symptom of low refrigerant charge, but it can also be caused by poor air flow.

Your system was installed last month and had a correct charge, then lost 3 lbs, then, the next day another 3 lbs., then the charge was fine ?

Then the compressor won't start ? Don't know if that is the correct chain of events.

Well, an under-charge will effect a compressor adversely and it will overheat and shut down. Or it will be damaged by liquid refrigerant if the system is over-charged.

Sounds like the compressor will have to have the compression ratio

tested to see if it has been damaged.

And, there is a leak because of the indoor coil is freezing. The leak will have to be found and repaired.

Is it possible that the repairmen allowed the 3 lbs. of refrigerant to escape when they were checking the system ?

a. If the charge took 30 minutes to show up as the correct low pressure, I would suspect that the refrigerant charge is not passing through the metering device and into the evaporator as designed. They should know in 2 minutes.

That could be because the metering device is restricted.

It could be that the charge they put in contained air via not purging their hoses on their gages. That can cause strange readings and low cooling.

b. The indoor fan blower motor has a run capacitor to help it operate and it may need to be replaced.

c.You can test your thermostat by Jumping it with an insulated wire, about 4 inches long. Remove the t-stat to view the subplate on the wall. Put the wire on R on one end and Y on the other. The outdoor and indoor units should start up. Remove wire. With R on one end and G on the other the indoor fan should start up.

If this works, then the t-stat is not working correctly. Maybe a loose wire connection.

if your Suction pressure was 0 then went back to normal you could have a restriction in the system causing refrigerant not to flow properly

and since Refrigerant gas coming back from Evaporator is what cools the Compressor motor your Compressor may have been of on thermal overload to protect the compressor from burning up if the compressor comes back on after sitting for an hour or two then it was more than likely offf on overload and the other post were Correct I would not let that AC tech or Company back in your yard that should have been repaired first trip out

Might be a bad breaker or it could be the unit has a blockage of some sort in the sealed system or both. It might be that a critter crawled into the contactor and screwed the whole works up.