Bloody Murphy's Law there mate!UPS guy just dropped off 2#s of calcium chloride, and a new heating element to replace the one I torched last week in the rims tube. MKll pump is so quiet i forgot when pre heating tun to shut it off after draining and with no water it gets fkn HOT! Lots of scrubbing and pbw and all is good. Now have a red warning light when pump is running. I should know better by now not to try and multitask