My LiftMaster garage door opener is 27 years old. I've replaced the drive gears once but otherwise it's been quite reliable. It's nominally 1/3 HP.
Recently it has started blowing its breaker intermittently. I think the rate is increasing. I removed the ~100W lightbulb but the trips continue. There are a few low wattage lights on the same breaker, including an outdoor "gaslight".
I once was looking at the lift when I hit the button, and saw a small flash as it tripped. At least once when it had tripped, I had to unplug the unit in order to reset the breaker. It worked normally when plugged back in.
I haven't opened it up yet but I'm just posting to see if anyone has previous experience that might explain all this. How about the limit settings? It occurs to me that it always fails fully closed.
Recently it has started blowing its breaker intermittently. I think the rate is increasing. I removed the ~100W lightbulb but the trips continue. There are a few low wattage lights on the same breaker, including an outdoor "gaslight".
I once was looking at the lift when I hit the button, and saw a small flash as it tripped. At least once when it had tripped, I had to unplug the unit in order to reset the breaker. It worked normally when plugged back in.
I haven't opened it up yet but I'm just posting to see if anyone has previous experience that might explain all this. How about the limit settings? It occurs to me that it always fails fully closed.