My aquastat was behaving for 8 months. ( used ). Its a Honeywell L8148E . Monday she started to act up. When the circ pumps were on, and the boiler temp was low she would stay closed and keep power going to the stoker until my safety aquastat opened at its high temp setting.
Normal issue ? Or should I look deeper for a reason ?
New one, Also scavenged but nice is working well.