Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
I have a 410A york microchannel condenser that on start up instantly goes up to 700 psi. It is not overcharged because I am the only one who has worked on this unit, did not do install but system has not been touched since. Coil is not dirty, as I chemically cleaned it on the spot. I'm thinking its the txv? Is it possible one of the circuits in the condenser is blocked, its microchannel, and that could cause the pressure? How could I test txv vs blockage. Thank you! Michael.