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.
Mitsubishi Split Refrigerant Line Sweating Water?
I have multiple Mitsubishi mini splits that were installed throughout my house. Yesterday we discovered a leak in my stairwell which as you can see caused damage to the ceiling. I believe the leak has been there since at least Friday. My roof is also new but initially thought this was the issue. My roofer was here this morning but could find no evidence of any leak going into my house for the roof or my siding. There are however water stains (can’t tell how old they are) directly below one of my splits refrigerant lines where it was zip tied and this is directly above where the ceiling had the leak. The drain line went on a separate run directly out of my house and so it’s not possible this caused the leak. The refrigerant line is bone dry right now but it has been very hot and humid here the last few days and this is an unconditioned west facing location on the 3rd floor. I also checked a refrigerant line for a different unit that’s outside and it’s wet like a sponge when touching the insulation (last picture).
Is it possible the refrigerant line is the cause of the leak? If it is, what is the best fix? Is this the right kind of insulation for the piping and if now what should be used?
Thanks for your help.