I have a Clack softener installed outside. I live in a part of Florida where it can be below freezing overnight for several hours. The spec for the Clack controller does not allow for an operating temperature below freezing. Is this something to be concerned about? What can I do? Also, should I protect it from rain? Everybody around here has them outside exposed.
Has it been damaged or is it working alright?
If you don't know if it is OK, use it for awhile and see.
If it is OK, keep doing what you have been doing to protect it from freezing.
If it isn't OK, you need to cover it up with like a tent using a good blanket or tarp etc..
Or build a building over it and heat it in some way.
Or, disconnect it from the plumbing and take the resin tank and control valve inside.
Then remember to uncover it, turn off the light in the building and vent the building so it doesn't get too hot in there, take it back outside and reconnect it etc. etc. and listen for future freeze warnings.
BTW, the Clack has UV protection but the tanks don't. And you can get an outdoor cover if you want to.