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Honeywell aquastat/anticipator question

JohnKV Member Posts: 12
Had a new Honeywell L8148A installed to replace one under warranty that lasted only a few months. I noticed the directions say that the aquastat is designed to work with the thermostat anticipator set at .2 Amps. Prior to this it’s been at .8 Amps, could this be the cause of early aquastat failure? This is for a Burnham oil fired boiler going to cast iron rads.


  • Tim McElwain
    Tim McElwain Member Posts: 4,628
    What was wrong with the old relay?
  • Jamie Hall
    Jamie Hall Member Posts: 23,452
    No, the anticipator setting is a recommendation to the place o where to start adjusting the anticipator to give the desired results with regard to overshoot and swing. But... it assumes you do, in fact, have an anticipator on your thermostat. Not all do... so it's a guide to adjusting the thermostat.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • JohnKV
    JohnKV Member Posts: 12
    edited January 2020
    Tim, the first one had fried on the board near the switching relay, the second one stopped working but not sure why.
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    Sounds like you have an electrical/grounding/neutral issue.
    In 30 years I've never replaced a customers aquastat twice.
    The anticipator setting has nothing to do with it.

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