What Moves Into a Garage Door in October, and What It Chews First

The last week of September rearranges Shelby County. Combines take the ground off around Anna and Botkins, the cover a field mouse lived in all summer goes out on a semi, and the nights turn cold enough that every warm structure with a seam in it gets looked over.

Your garage is that structure. The awkward part is that the pieces of a garage door an animal likes are the ones that leave you in the driveway in November pressing a button that does nothing.

Why do mice and wasps move into a garage in late September?

Mice move into a garage in late September because the field they were living in has come off. Harvest strips cover from hundreds of acres in a few days, the nights drop, and a garage offers heat, spilled food and a dozen seams at ground level. Wasps are running the opposite errand. Their colony is winding down and mated queens are looking for somewhere dry and still to sit out the winter.

Attached garages get the mice, because the shared wall with the house is warm and the dryer vent and the laundry door leak heat into a space nobody is standing in. Detached garages and farm outbuildings out toward Jackson Center and Fort Loramie get the field edge instead, which is worse, because the traffic arrives in one week rather than over a month. Birds come in a different way entirely, through an overhead door left open for an afternoon of unloading, and they are looking for a ledge, not a hole.

Almost all of this lands on the opener system rather than on the door panels, which makes it a garage door opener repair in Sidney problem more than a pest problem.

What does a chewed garage door sensor wire look like from the floor?

Look down each door jamb at the pair of thin wires running to the photo eyes. Chewed ones show curls of shaved insulation and droppings on the floor under the sensor bracket, a bright twist of bare copper where the jacket is gone, or a length pulled out of its staples and hanging. The door reverses with nothing anywhere near the beam.

That wire is low-voltage and soft, and it is stapled down the jamb at about shin height. Shin height is also where the broom, the softener salt and a leaning bike tire live, so nothing about the damage is in your line of sight. Where the jacket is gone, bare copper against the steel jamb or against its own partner conductor reads to the opener the same way a blocked beam does.

From the wall button you cannot tell them apart. A chewed conductor and a photo eye that got bumped out of alignment both give you a door that starts down, stops, comes back up, and blinks a light at you. The general path for that is already written up in why a garage door won’t close. Run it, and come back here if what you find at the bottom of the jamb is copper.

What gets into the opener’s motor head, and what does a nest do in there?

Mice go up. The motor head is warm, enclosed and quiet, with a light housing that holds heat after the bulb goes off, so a nest ends up on or beside the logic board, built from insulation, cardboard and whatever else was open in the garage. Nesting material and urine on a board is usually something you smell before anything fails.

The symptoms are indirect, which is why this one gets misdiagnosed. An opener that quits outright, trips a breaker, or smells hot when the light comes on. Lost remote range belongs on the list too, since the antenna wire hangs at the height something in the ceiling can reach, and lost range has its own checks to run first.

Before assuming something lives up there, run the five-minute opener triage. What it will not tell you to do is open the motor head, and neither will we. Inside that case is line voltage and a circuit board, over your head on a ladder.

What do wasps and birds build on the track and the opener rail?

Paper nests go into sheltered horizontal spots, which on a garage door means inside the horizontal track, on top of the opener rail, and in the corner where the track meets its back hanger. Mud daubers and swallows build higher and harder, at the top bracket and along the header above the opening. All of those spots are places something has to move through.

A roller that meets a dried mud nest does one of two things. It stops, or it climbs, and a door that binds part-way is one of the ordinary ways a door ends up off its track. The other consequence is the one people forget in October: a nest at the header sits directly over the spot where you stand when the door is going up, and cold mornings make a colony sluggish rather than gone. A warm afternoon brings it right back.

If the nest is live, it gets dealt with before any door work, not during it, and not by us. We are a garage door company. We are not going to open a toolbox under an occupied nest and neither should you.

Is the gap under the door how they get in?

Usually not. The bottom rubber is the most blamed and least guilty part of the building. A mouse has easier options: the joint where the block wall meets the slab, the worn sweep under the service door, a gable or soffit vent if it is a bird, and the overhead door itself standing wide open on a warm afternoon while somebody unloads a truck. A perfect seal changes very little of that traffic.

None of which means a bad seal is fine. It is a water and comfort problem worth solving on its own merits, on a different afternoon than this one.

Which of these is a repair call, and which is housekeeping?

The split is clean. Anything electrical and anything that moves is service work. Anything that is food, mess or storage is yours, and that is the half that keeps them from coming back next October.

Service work:

• a chewed sensor wire, or any gnawed jacket on the opener’s cord
• nesting material inside the motor head, and whatever the board looks like under it
• a track or rail with a nest in it, plus any roller or hinge damage behind it
• anything binding long enough that the door no longer runs the same both ways

Yours:

• sweeping the floor and the sill, worst in the weeks grain dust is blowing around
• seed corn, birdseed, grass seed and salt bags off the floor and into bins with lids
• pet food in a sealed container, not the paper bag it came in
• cleaning the rail and the top bracket once a nest is out

Which side you are on is the diagnosis line on the published price list, $80 to $120 for the service call, applied toward the repair if you go ahead. Copper at the jamb, a nest on the board or a rail the door is dragging on is garage door opener repair in Sidney work rather than housekeeping.

What shouldn’t you do to keep them out?

Keep expanding foam away from the track, the rollers and every piece of hardware, because it cures where it lands and a fouled roller costs more than the mouse ever did. Do not pack steel wool into the bottom seal, where it holds water against the rubber and rusts the panel it touches.

No bait and no poison inside the motor head or on the rail, where a dead mouse ends up over the car and the residue ends up on a board somebody has to replace. And never tape over a photo eye that keeps reversing, which converts a nuisance into a door with no safety system on it at all.

Two things do hold. The food goes in bins, and the seams they are actually using get closed: the wall-to-slab joint and the gap around the service door, done with material meant for the job rather than whatever was in the drawer.

Sound like your situation? The service page has our published ranges and what a visit involves: Garage door opener repair in Sidney.