Hello It is an Eco Smart On Demand panel. When the oil boiler went into Latchup or Lockout mode, I switched this on for the hot water. See the fix here FHW oil burner went into Latchup or Lockout mode! I use wood pellets for heat. It worked fine for a couple days and then the water came out Luke warm. To prevent an emergency no hot water call I had to do something. Normally what needs to be done is one of the following in the following order: Flush the unit with descaler or vinegar Replace the flow valve Replace the heater elements Since the elements seam good and the flow valve was replaced about a year ago, I setup the flush bucket, connected the hoses and ran the descaler thru for 45 mins. That did the trick! It worked as a good backup for the oil hot water for 2 weeks. Has anyone done this?
