Transformer for the Overhead Door Legacy 850 (model #2029), Standard Drive 650 (model #1029) and Legacy 920 (model #7020H or #7020H-B) garage door openers. Replaced part number 38646RS
Epoxied, Stacked Lamination 120V
Parts Numbers: 39342, 39342R.S, 38646RS, 38646, 38646R.S
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I saw a headline on the web site saying "is your garage door opener humming?". Well it was. The advice was to change the transformer. I ordered the appropriate unit and was pleased to find very explicit and informative directions. The installation took less than 15 minutes and my opener no longer hums. BTW, the old transformer was VERY hot when took it out. I'm pretty sure this easy repair saved a costly event later.
I had a transformer buzzing, so I ordered a new one here. came quick and nicely packed. 5 screws and two plugs later, no buzz and a garage door that works.
This part works OK but original one only lasted 2 years. Not sure what to expect with replacement
Easy to replace previous transformer.