Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit


mameno Member Posts: 3
my circulating pump is not working its not getting voltage from my honeywell l8148e aquastat relay there is voltage going into the 18148e is this a common failure


  • kcopp
    kcopp Member Posts: 3,717
    it does happen.....
    The circuit is closed at TT?
  • mameno
    mameno Member Posts: 3
    HVACNUT Member Posts: 3,917
    TT are the terminals in the aquastat that the thermostat wires are connected to.
    Are you assuming there's no power (115v) th C1,C2, or are you checking with a meter?
    You can jump the TT terminals and see if the relay closes and the pump starts.
    Question, that is a high limit only aquastat, so, does the burner ignite when you raise the thermostat or jump TT?
  • newagedawn
    newagedawn Member Posts: 587
    and the answer was? lol homeowners
    "The bitter taste of a poor install lasts far longer than the JOY of the lowest price"
  • mameno
    mameno Member Posts: 3
    everything works the zone valves open the furnace cycles on and off just the ciculating pump doesnt work theres no power at the pump conections checking with a test light for household current
    HVACNUT Member Posts: 3,917
    The TT circuit closes from the end switches on the zone valves.
    B1,B2 is energized for the burner circuit.
    No power at C1,C2.
    You need a new aquastat.

    If you don't have a low water cutoff on the boiler, look into an aquastat for gas like the Hydrostat or Aquasmart with a built-in LWCO. You'll have to change the well also.
    Cost is compatible.
  • GW
    GW Member Posts: 4,096
    Yes we have that control on our service truck for that very reason, they do croak
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    [email protected]
Sign In or Register to comment.


It looks like you're new here. If you want to get involved, click one of these buttons!