Triassic Posted December 18, 2020 Posted December 18, 2020 I've finally got my Willis powered under floor heating working. But!! The earth leakage device on the split fuse board trips randomly. I switch the pump and Willis heater on and it will happily work for 10 to 20 minutes then trips for no obvious reason. I’ve double checked all the wiring and swapped the earth leakage device. Has anyone experienced similar, what should I be checking/replacing next?
ProDave Posted December 18, 2020 Posted December 18, 2020 You need to do an insulation resistance check with a megger, most likely the immersion heater element is faulty. such faults often only show when the heater gets hot.
dpmiller Posted December 18, 2020 Posted December 18, 2020 generally the modern willis is a soldered-up unit, it's rare to see one that has a seperate shell and element.
Triassic Posted December 19, 2020 Author Posted December 19, 2020 17 hours ago, dpmiller said: generally the modern willis is a soldered-up unit, it's rare to see one that has a seperate shell and element. Yes they are! So no repair possible. Having checked the insulation resistance of the pump and the Willis I’ve concluded that the pump I may be at fault. Just off to get a new one.
Triassic Posted January 1, 2021 Author Posted January 1, 2021 (edited) Having done some tests I had an hunch it was the pump at fault, it was second hand! A new pump fitted and everything is now running a dream. Edited January 1, 2021 by Triassic
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