How much does it cost to fix garage door safety sensors?

Short answer

Testing the garage door's auto-reverse costs nothing and takes 5 minutes. The cost comes when it fails: a garage door technician charges $100 to $200 to realign or replace the photo-eye safety sensors, or to adjust the opener's force setting so the door reverses when it meets resistance. A door that doesn't reverse can crush a child or a pet, and the fix is cheap next to that, so a failed test is a same-week call.

Cost breakdown

The DIY column is the test, which uses a scrap of wood or a roll of paper towels you already have. The pro column is the technician's visit, with the sensors if they need replacing.

What drives the cost

• Which part failed. A sensor knocked out of alignment is a quick adjustment at the low end. A sensor that's dead, or wiring that's been chewed or cut, is a replacement at the high end.
• The opener's age. An old opener without photo-eye sensors can't be made safe with an adjustment, and the fix is a new opener, which is a separate and larger cost.
• The force setting. If the sensors are fine but the door doesn't reverse on contact, the fix is a force adjustment on the opener, and a technician can do it in minutes.
• The call-out. A sensor fix on its own costs the full visit. Done during a tune-up already scheduled, it's often included.
• Doing it yourself. Realigning the sensors so their lights are solid, and cleaning the lenses, costs nothing and fixes the most common failure.

DIY vs. pro

The test is yours, every month: how often to test the garage door auto-reverse is once a month, and it's a board under the door and a hand wave through the sensor beam. It costs nothing and takes 5 minutes.

The first fix is also yours: check that both sensor lights are solid, wipe the lenses, and nudge a sensor until its light stops blinking. If that doesn't do it, or if the door closes on the board without reversing, call the technician for the $100 to $200 visit. Don't adjust the force setting yourself to make the door close, since that's the setting that decides how hard it pushes on whatever is under it.

FAQ

How much does it cost to replace garage door sensors?

$100 to $200 for a technician to replace or realign them, including the parts.

Does it cost anything to test the auto-reverse?

No. Put a board or a roll of paper towels under the door and close it. It should reverse on contact. Then wave a hand through the sensor beam while it's closing.

Can I realign garage door sensors myself?

Yes. Clean the lenses and adjust each sensor until its light is steady. That fixes most failures for free.

What if my opener has no safety sensors?

It's old enough that it should be replaced. A new opener includes the sensors and the auto-reverse, and it's a separate cost from the sensor fix.