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Garage Door Won't Close All the Way
in Plano, TX
A door that stops short of closing or bounces back up before it hits the floor is a safety and security problem. In Plano, this call comes in most often after a dry stretch of weather when dust from open fields in east Plano or construction sites gets into the sensor lenses. It also happens when the concrete floor settles slightly due to the shrinking clay soil underneath, which makes the bottom seal catch or the close limit setting become inaccurate.
Quick Answer
A garage door that won't close fully is usually caused by sensor obstruction, a limit switch set wrong, or a bent bottom seal catching on the floor. In Plano, dust and debris from the summer dry season clog sensor lenses regularly and trigger false obstruction readings. A technician checks the sensors, adjusts the close limit on the opener, and inspects the bottom seal. Call (361) 470-4268 if the door won't close at all, especially at night.
Telltale Signs
Warning Signs to Watch For
- Door closes to within 2 to 4 inches of the ground and then reverses
- Door closes fully only if you hold the wall button down the whole time
- The sensor light on one unit is blinking or off entirely
- Bottom of the door drags or catches on one side of the floor
- Door behaves differently in summer heat versus cooler months
Root Causes
What Causes Garage Door Won't Close All the Way?
Blocked or Dirty Safety Sensors
The two sensors at the bottom of the tracks send an invisible beam across the door opening. When dust, a cobweb, or a small object breaks that beam, the opener reads it as an obstruction and reverses the door. In Plano's dry summers, fine dust from surrounding construction settles on the sensor lenses every few weeks.
The Fix
Sensor Cleaning and Realignment
The technician wipes the lenses, checks that both sensors are aimed directly at each other, and secures any loose mounting brackets. This fix takes minutes and solves the problem most of the time.
Close Limit Setting Off
The close limit is a setting on the opener that tells it how far down to travel before stopping. When the concrete floor shifts slightly from Plano's clay soil movement, the door hits the floor before or after the opener expects it to, and the unit interprets that as a blockage. This is common in houses built in the 1980s where slabs have had decades to settle.
The Fix
Close Limit Adjustment
The technician turns the close limit adjustment screw on the opener unit in small increments until the door seats flush against the floor seal. No parts are needed for this adjustment in most cases.
Damaged Bottom Seal or Uneven Floor
The rubber bottom seal compresses against the floor when the door closes. If the seal is torn, cracked from years of UV exposure, or if the floor has an uneven spot, the door either won't compress it fully or the opener's force threshold is tripped before the door hits the floor. Both conditions trigger the auto-reverse.
The Fix
Bottom Seal Replacement
The technician slides out the old seal from the retainer channel and installs a new one sized to the door width. If the floor has a low spot, a threshold seal can be added to the floor itself to fill the gap.
Self-Diagnosis
Which Cause Applies to You?
Check the signs you're observing to narrow down the likely root cause before your inspection.
| What You're Seeing | Blocked or Dirty Safety Sensors | Close Limit Setting Off | Damaged Bottom Seal or Uneven Floor |
|---|---|---|---|
| One sensor light is blinking amber, the other is solid green | |||
| Door reverses consistently at the same height, a few inches off the floor | |||
| Bottom seal visibly cracked, torn, or missing a chunk | |||
| Door closes only when wall button is held down continuously | |||
| Problem got worse after a rainy season followed by a long dry spell |
Free Inspection
Get a Diagnosis in Plano
An on-site inspection is the only way to confirm which cause applies to your property. Free, no obligation.
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Serving Plano & surrounding areas
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