The LiftMaster 41C213 transformer and harness from North Shore Commercial Door is a one-piece transformer kit for residential screw drive garage door operators. This replacement transformer with harness is compatible with LiftMaster 3840 garage door operators and similar Chamberlain screw drive garage door openers. Check your garage door opener manual to confirm compatibility, or contact our staff for free tech support. The transformer, which relays current to the motor, is sometimes the culprit when the motor doesn't turn on.
- Transformer plus attached harness
- For residential screw drive garage door operators
- Check manual (or ask us) to confirm compatibility