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System 2000 domestic hot water

Hi Larry, The system is not keeping up with hot water while taking a shower. After running the shower for 3or 4 minutes the water coos rather quickly. I suddenly have more shower water pressure but less duration of hot water. Thanks


  • Larry Weingarten
    Larry Weingarten Member Posts: 3,335
    Hi @grumpy47 , Have you tried a crossover test to see if the problem might be out in the plumbing somewhere?
    Yours, Larry
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    When is the last time the plate heat exchanger was properly flushed?

    There was an error rendering this rich post.

  • kcopp
    kcopp Member Posts: 4,441
    Dip tube failure...
    rick in Alaska
  • Roger
    Roger Member Posts: 333
    Thank you for your question, @grumpy47 .
    Very little heat is reaching your (likely) 40 gallon or larger storage tank. If you have a continuous call for hot water on the manager, it is not your tank thermostat. If you have a plate heat exchanger, it could be the domestic bronze circulator or possibly a fouled plate heat exchanger.
    Your heating pro can probably figure it out quickly.
    Hot water diagnostics start on p.18 in this hot water manual.
    Energy Kinetics, Inc.
    Larry Weingarten
  • grumpy47
    grumpy47 Member Posts: 5
    Thanks so much for your help. The system 2000 I have is great and has been so dependable. I have had it for 18 years with very little problems