Why are the Frozen Temperature panels not turning solid? The PCM inside is NOT below its phase change temperature of -21.5°C/-6.7°F. Make sure that the freezer temperature is always below -23°C/-9.4°F. Post navigationPrevious post: Why are the Fridge Temperature panels (PCM) not turning solid?Next post: Can a regular freezer be used to condition refrigerator temperature panels and store panels? Comment on this FAQ Cancel replyYou must be logged in to post a comment.