How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Machinc Your Own Question
Machinc, General Contractor
Category: Home Improvement
Satisfied Customers: 945
Experience:  Has written home improvement articles since 2008. Earned South Carolina Residential Builders License in 1991.
Type Your Home Improvement Question Here...
Machinc is online now
A new question is answered every 9 seconds

I have a liftmaster on my house. After a storm in which lightning

Customer Question

I have a liftmaster on my house. After a storm in which lightning hit near the house, the remotes no longer work and I can't get it to program. The led comes on on the unit when the smart button is pressed but it doesn't set remotes. Help?
Submitted: 4 years ago.
Category: Home Improvement
Expert:  Machinc replied 4 years ago.
The circuit board in this units are highly
Sensitive to lightning damage.
The damage can be subtle or take out
the whole board. Sometimes you can smell
It or you can see a gray or black spot on the board.
Some diodes will blow their top off leaving
what looks like an open can.
If this damaged exists Replacing the circuit board is the only fix .
If you need me to I can help you go through
the flow chart in your manual to make sure this is the

David Machado
Expert:  Machinc replied 4 years ago.
If you don't have a manual I can find one on line.

David Machado
Expert:  MsBabyD replied 4 years ago.

First take the batteries out of both remotes and keep them out. Before you resit it . unplug the main, and wait 30 seconds and replug it in before resitting it.reset the main lift master. Make sure the screen clears. And please make sure you hold down the lift master reset bottom for 10 seconds. Then try it with out the hand remotes. Before or during a power outage it gives a surge. So it will knock out your main not your remotes. Also look at you electrical panel and see if it triggered a circuit to the off position.
See if this clears the screen and restarts the lift master. If it does then replace the batteries in the remotes and try them separately. Let me know if that work Also Let me know what happens.

Power storms normally trigger the intake of the electric and it just needs to be reset. There should be no burn marks on your circuit board from a lighting storm?

it should not knock out your remotes. Now if your remotes broke with out a power storm that is a different story.

Expert:  Machinc replied 4 years ago.
Ithe information I have given about lighting is correct.Circuit boards can suffer from indirect hits .That is not the only possibility but it is a very possible one since you have already worked with your remotes if resets don't clear the problemI would suspect the circuit board,Let me know how it goes.David Machado.
Expert:  Machinc replied 4 years ago.
I will continue to work with you on this problem
with your opener.

David Machado
Expert:  Machinc replied 4 years ago.

Liftmaster parts site

This is a site about lightning damage to circuit boards and surge protection.

Hope you find these helpful .

David Machado
Expert:  Machinc replied 4 years ago.
Just checking to see if the sites were helpful
in resolving your problem.

David Machado
Expert:  Machinc replied 4 years ago.
Just checking back to see if you
were able to use the suggested sites
to find the parts and repair your door lift.

David. Machado
Expert:  Machinc replied 4 years ago.
Wanted to make sure your question was answered.
If you need anything else please let me know.

David. Machado