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Aquastat Relay L8148E

Hello, I have the above mentioned relay and it only works if I push in the wiring harness from the RVGP-KS-7BKF damper, wondering if might be loose solder in the harness. Would it not start if there was a problem with the damper Anyone have any input or troubleshooting advice? thanks


  • Paul48
    Paul48 Member Posts: 4,469
    It's probably in the connector, and the boiler will not start unless it gets the signal that the damper is open.
  • Tim McElwain
    Tim McElwain Member Posts: 4,629
    edited January 2017
    There have been some problems with the connection for the damper on this relay. I have found pushing the harness in tightly and then placing tape across the harness to hold it in place seems to resolve the problem.
  • grovestreet449
    grovestreet449 Member Posts: 2
    Tim, have you ever replaced the wiring harness or tried to resolder the connections?