The relay works fine. I removed the horn and readjusted the horn works as design. I just don't like the horn sound.
old2065
Adjusting the tension screw on the "horn" (buzzer, really) is the other thing I should have suggested and it seems you have done so successfully. I'm glad you have it working consistently now. Many say the horn and motor sounds are part of the "charm" of the PW F3 "growlers." Installing new ERR boards may also adversely affect the value of the set, depending on its condition.