Chosen Solution
Hi all, Running a new Samsung EVO 870 2TB SSD on the iMac 27" mid 2017 with a OWC in-Line Digital Thermal Sensor HDD Upgrade Cable and OWC NWTADPTADRV NewerTech AdaptaDrive. Running Monterey 12.6. Opened it all up, all went well but now the fan speed has been set at max and doesn’t slow or stop at all. Have tried majority of third party software that claims to allow fan speed control in these situations. Macs Fan Control, HDD Fan Control, as well as about 3 other popular ones. Safe mode doesn’t stop the fan.Diagnostic gives me PPF003 and PPF004 codes suggesting an error on the fan. Obviously!Fan still runs in recovery mode.Have reinstalled the old Macintosh HDD without the thermal sensor cable adapter (back to original) but the fan still runs like crazy. Wondering if it’s something I’ve done. Is it the logic board now playing up or is it OS based not allowing me to run a drive upgrade? Could it be a fan error (even though it’s running at full speed) and a simple replacement would work? Thanks in advance for all your guidance.
Did you follow to the letter this guide iMac 27" 2017 Hard Drive Replacement Did you use the proper tools? You may have damaged the display assembly and/or the cables
