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Buderus 142-24 hot water issues
Unit is about 7 years old. Always had aquastat set to about 135* f so no scalding issues in past. Have DHW as an indirect using a Bradford-White SW250rl unit. Recently noticed DHW was unusually hot while showering and checked temp at faucet-170* f . Changed Aquastat to new Buderus unit and used copper shims to transmit tank temp back into sensor as directed.
Water temp is now down to about 150*f BUT dial on Buderus controls HAVE NEVER been accurate. Used to have it set to about 100, which gave my water about 135ish. Now have it set to 90*, which gives my about 150ish. Can't really go any lower.
Is there a way to recalibrate controls so the dial is closer to what actual temp in tank is?
I am planning on installing an anti scald valve ASAP but not really sure what has changed in the last few weeks to give me such issues.
Any insight is greatly appreciated.