Editor's Note: An HE washer stands for "high efficiency washer". They are typically front loading washers that use much less water than conventional washing machines.
Yes, it's safe for HE washers. I have been using it for years. Homemade laundry detergent is really soap and doesn't suds at all. It keeps the washer and its lines clean--there is no build-up. If your water is extremely hard, you'll have to use more than the recommended amount.
I do not have an HE washer, but I did find these links. The answers do not seem really "clear" -- but it seems like those who have used it have had no issues. Read your manual for sure, and then decide whether you are willing to take a shot at it.
My repair guy who came once annually to look over my machines, when I lived in Maryland, was always full of useful tips and information for taking care of my appliances. If you have a repair person you trust, they might be the best to ask.
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