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Laars Endurance EBP175 Short Cycling

Nitram Member Posts: 2
I have 2 of these units installed in 2006. One works fine the other is now short cycling when calling for heat or DHW. I had a new pump (red one) inside unit replace and bled system. Prior to that it was kettling really bad. Now it just short cycles between 150 and 200 degrees. Have had a Laars recommend person come but could they did not even know how to bleed it properly then had Plummer come and change pump and bleed system But can’t seem to figure out short cycling
I can’t seem to get any help from Laars. Anyone have any suggestions


  • Ironman
    Ironman Member Posts: 7,216
    Is the circulator pumping in the right direction?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Nitram
    Nitram Member Posts: 2
    Yes circulator pump in right direct. I jumped internal zone valve and water flows thru zones yet it’s too short cycles