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aquastat repeat trip (burn out) - why?
I have a weil mclain oil boiler < 10 years old
Beckett Motor and now a honeywell aquastat board (we had a different digital board before - not sure of the brand).
Last week we lost power overnight. When it came back on, the furnace would not start.
Service guy came out identified that the digital aquastat was tripped. He identified it in about 10 seconds. He unplugged one of the wires. He identified that the wires are flimsy and he did not like that style. plugged if back in, it started up and then it tripped again.
He identified it as bad wires and "you cannot just replace the wires" so he installed the honeywell aquastat L7224 (universal model).
Three days later again no heat or hot water.
Comes out and says a circuit on the Honeywell aquastat board was bad.
Assumed a bad board and installs another Honeywell Aquastat L7224.
6 hours later, we are out again.
Something is causing too much juice to the aquastat board. I had the electric company check voltage coming to the house - no issue. Had an electrician friend check all of the connections from the panel to the boiler. Everything looks in good shape.
Any ideas on what could be burning out the aquastat?