Temp off air coming out of register 74 degrees suction line temp is 42 degrees but high side line isnt warm dont look like it is wanting to take freon either compressor is running new system low side is showing about 45 gsx130481ba my guess compaciator bad

The outside ambient temp has little effect on the suction pressure. The indoor temp is what will slightly effect the suction pressure. In the trade we say we want a 40 degree evap coil, this means approximately 125psi. This is when the indoor temp is around 74 to 78 degrees. The hotter the house, the higher the pressure. I like to see a 50 degree evaporator when the indoor temp is above 80. Charging by subcooling is the way to go!!

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the psi on your unit will fluctuate ...dirty filter will cause it to be lower'' high humidity will cause it to be higher,,, the perfect scenario is 95 outside, 75 inside with 50 percent humidity,,, then it should read 68 psi which is a 40 degree coil temp. only when these conditions are perfect will your psi be 68psi

You turn system on to cool setting and run temp down until outside unit comes on. Then you connect your suction side of your gauges to the suction side of your outdoor unit. Next you connect the liquid(high)side of your gauges to the liquid line on your outside unit(the little copper line). Connect the middle hose of your gauges to the 410a drum of refrigerant. Before opening the suction or low pressure side of the gauges you need to turn the drum upside down and turn drum of 410a on. Then you need a temp reading meter and clamp to read the temp of your liquid line(small line). While charging you want to make sure to release refrigerant slowly. The unit should call for a specified subcooling on unit plate. 7 to 10 degrees. You take the liquid line temp and subtract it from saturation temp on the high side of your gauges.(it'll be the pink numbers on the right side of your gauge.

Because you have a ductwork problem. Look for leaks in the supply lines or a dirty coil not allowing sufficient airflow.

Make sure the outside fan is running. Also check the high side pressure, I assume the 70# is the low side pressure, so you can tell what the compressor is doing. If the fan and compressor are both working, make sure there is good airflow through outdoor coil and check that it is clean. Let me know what you find.

Where are you connecting the gauges? It sounds like you have both gages on the high pressure side. You can't hook the suction gauge to the Big line on a heatpump because that is high pressure in the heating mode. There should be another tap that says low side or low pressure, that's where you hook the suction gauge. As for adding more refrigerant, I wouldn't do that until I measure the subcooling.
If you charge it in heating unless you weigh it in you want about 10° to 15° subcooling. Then this summer you need to check the subcooling at about 95° outdoor ambient then charge it to about 10° to 15° subcooling in the cooling mode and that should be the correct charge.

If your unit is running 24/7 you are either low on charge or the unit is to small for your house.
A 20° temperature difference is about normal for the room air vs the air coming out of the ducts, but the room air and the leaving air should keep getting colder and colder.
An air conditioner should cycle approximately 3 maybe 4 times in an hour if it's properly sized.
As for the thermostat thermometer they are very cheap and are more for reference than actual temperature, so if 78° is not comfortable, then you should set it lower but not rely on thermostat being accurate or what the thermometer is saying as long as it is consistent.
The air conditioner and thermostat can also be set below 78°, there's a lot of people set them at 72° and below with no problems.
the only thing is if you have real low humidity you'll need to watch indoor coil or the suction line (the big line) on your outdoor unit and make sure it doesn't freeze up on you.

the tracer is the same as the ESCORT, right?? TRY THIS--I WORK ON PLENTY OF ESCORTS--LOOK UNDER THE AIR CLEANER/CONE ASSEMBLY--THERE WILL BE A BLACK METAL BOX(FULL OF RELAYS) ONE OF WHICH IS THE A/C RELAY--TRY TAPPING ON IT WITH A LONG SCREWDRIVER OR SOMETHING SIMILAR WHILE U HAVE THE A/C ON. IF THE A/C SUDDENLY STARTS WORKING U NEED TO GET A NEW RELAY BOX(I THINK ITS CALLED A GEM MODULE) i do have a question- does the blower motor work?? how do u know the compressor is good??do you have 12 volts going to it??? this relay box is pretty common to go bad--u have to remove the air cleaner in order to get to it.get back to me.

I assume r-22 refrigerant by the pressure... you have a saturate temperature of approximately 41 degree and 71 degrees at the service port this equates to a 30 degree superheat. a condenser saturation temperature of 105 degrees and since the liquid line temp at the service valve is not given only the enterin indoor coil on the liquid line a 96 degree temperature this would equate to a subcooling temperatureof about nine degrees. You have too high of a superheat reading. verify that the bulb for the txv is correctly positioned and insulated. if it is then you need to remove the bulb from the suction line, hold it in your hand to warm it up and see if the superheat changes. you could also have issues with your ductwork. If the supply temperture is around 50-55 degrees then the unit is doing all it can.. Check the txv and the ductwork as the subcooling indicates that the condenser side is doing it's job, but the superheat readings indicate that you are starving the evaporator..

If it is very hot in the house the suction will be high but not that high. If you have a 13 seer inside and a 10 seer outside your suction can be that high if you don't lower fan speed. Does your unit coll ok. Another reason if it is not cooling well is bad valve in compressor but the compressor would going out on internal overload because of getting to hot. If you have TXV metering device it could be stuck open. Check sub cooling. Put a thermometer on the 3/8 line and measure the difference between that temp and the guage temp. Look at your pressure and the temp reading is nest to the pressure. The difference should be between 12 and 16 degrees. Measure Large line temp for superheat difference should be between. 12 and 16 degrees. Feed back please