Hello again, thanks for accepting. We can continue on the same dime so to speak
with the suction pressure in a vacuum there is not enough refrigerant flow to run the head pressure to normal levels... it should be running quite low...... unless... the system was grossly over charged with refrigerant to get the pressure up.
we can discuss all that and the many possible causes.
a blocked refrigerant metering device, feeding the evaporator
coil (the outside coil in heating mode, and the inside coil in cooling mode)...
...is almost certainly the cause. 99% chance of that.
Why the refrigerant metering device is clogged or not working is another issue.
There can be many causes for that.
I need to ask you a bunch of questions around that topic
- Had you changed the compressor recently?
- is the new drier the type made for heat pumps
- tell me about the flow arrow(s) on the drier
- tell me if the system had a refrigerant leak and had been running in a vacuum earlier before you did this work
- tell me how long you evacuated the system for and at what micron range.
Im looking for moisture in the system or a bad mix of POE and mineral oil that sometimes happens with compressor changes.
We can go from there, Phil