Opener brand
Linear garage door opener repair and MegaCode remote programming
We repair Linear garage door openers across the Portland metro and in Vancouver, WA, read their flash codes, realign their safety beams and pair MegaCode remotes and keypads, so a Linear your builder or a past installer chose keeps working.
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Linear in Portland-area garages
Linear is a Carlsbad, California access control and radio maker, now part of Nice North America, whose openers reach Portland-area garages through professional installers rather than store shelves. It has built that kind of equipment since 1961.
Manuals from a few years back carry the Nortek Security & Control name, so either owner may appear on your paperwork. Linear sells several head units without a rail so the installer can pair them with a belt or chain rail on site, which means a door company, a previous owner or the builder picked yours.
Linear is also a long-standing remote maker, and its MegaCode radio runs at 318 MHz, a frequency the big retail opener brands skip. That one detail explains why a hardware store remote so often refuses to pair, and it is the first thing we check on any Linear opener repair.
How to tell it is a Linear
The Linear name by the light lens, a model number such as LDO50 or LDCO850, and limit dials or LEARN buttons on the motor unit confirm one before you buy a remote.
- The Linear name on the housing beside the light lens; newer units may read Nice Linear or Linear Pro Access.
- A model number such as LDO33, LDO50, LSO50, LCO75, LDCO801, LDCO850 or LDCO863B on the motor label.
- On the AC units, two round dials on the housing set the open and close limits; on the DC units, UP, DOWN and LEARN buttons with red and green lights sit on the back.
- On an LDCO850, a receiving safety beam eye that shows green for power and a steady red light when the beam is lined up.
- A three-button visor remote running on a CR2032 coin cell, the style Linear packs with its LDCO openers.
Linear models we see on service calls
Linear's manual library and product pages list these residential operators, grouped here from the Nice-branded units to the AC models with limit dials.
| Model | Years sold | Notes |
|---|---|---|
| Nice Linear 621, 661 and 861 | Current | Newer DC units under the Nice name. The 661 switches between chain and belt, comes with a backup battery installed and LED lighting, and links to the Nice G.O. app through a Wi-Fi and Bluetooth wall station. |
| LDCO841 and LDCO863B | Not published; check the label | Smart DC operators with strong LED lighting; Linear rates the LDCO863B at 4,100 lumens. |
| LDCO850 and LDCO852 | Manual dated 2019 | Smart Wi-Fi DC openers on a belt or chain rail, run through the Linear PRO Access app. Limits are electronic, and a backup battery can sit in a box inside the housing. |
| LDCO801 | Current | A single-light DC operator with MegaCode radio and optional battery backup, sold without a rail for 7, 8 or 10 foot doors, with a three-button visor remote. |
| LDO33, LDO50 and LSO50 | Not published | AC operators rated 1/3 or 1/2 HP with interchangeable belt or chain drive on a T or I rail. Limits are set with dials, and the LSO50 adds dual lights and vibration isolation hangers. |
Known Linear issues and the fix
Many Linear faults show up as light flashes, coded below as the LDCO850 manual lists them, so each problem starts with what the opener is telling you.
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Three flashes, and the door goes back up
On an LDCO850, three flashes means the safety beam was blocked or out of line. We clear the path, realign the eyes until the receiver's red light holds steady, check the wire for staples or shorts, and rerun the reversal test. Garage Door Safety Sensor Repair, from $129
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Two flashes, and nothing runs the door
Two flashes points to shorted wall station wires, often a staple driven through the cable or a frayed run. We find the short, replace the wire and test the wall station. Garage Door Opener Repair, from $149
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Four or seven flashes, and the door reverses or stops
Four means the opener sensed too much force; seven means its encoder reported an error. Both often trace to a binding door, so we check rollers, hinges and springs before resetting limits, and replace the encoder or board if the fault returns. Garage Door Opener Repair, from $149
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A new remote will not learn the opener
Linear receivers expect MegaCode at 318 MHz, so remotes tuned to other brands' frequencies are ignored. We match a MegaCode or Linear-compatible remote and program it at the LEARN button while the red light is on. Garage Door Remotes, Keypads and Smart Controls, from $89
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The wall station light is red and the app shows offline
On LDCO850 wall stations, red means no Wi-Fi connection, yellow an update and green connected. After a router or password change, holding the Wi-Fi Link button for ten seconds resets the station so we can relink it. Garage Door Remotes, Keypads and Smart Controls, from $89
Why other remotes will not pair with a Linear opener
Frequency is the reason: Linear's MegaCode radio uses 318 MHz, while most home-center remotes are built for the 315 and 390 MHz systems Chamberlain and Genie use, so the Linear receiver ignores them.
Universal remotes that list Linear MegaCode will work, and holding LEARN for ten seconds on an LDCO850 erases every stored remote and keypad code, the step to take after a remote goes missing. Some newer car owners, Rivian drivers among them, report trouble teaching built-in buttons to a Linear, so we check the car maker's notes first.
Linear parts and upkeep for a pro-installed opener
Linear publishes installation manuals, user manuals and replacement parts lists for its residential operators, so the model number on the motor label is enough to find the right part.
We carry remotes and safety beams that fit Linear units and order model-specific boards, encoders and backup batteries. Linear asks for a tension check every six months: the spring in a belt traveler should measure about an inch, and a chain turnbuckle should sit just above the rail.
Linear openers in newer Clark County and Washington County homes
A Linear can arrive with the house when a builder's door installer picks the opener, so owners in 1990s and 2000s subdivisions around Vancouver and Hillsboro may meet the brand only when a remote dies.
An AC unit like the LDO50 is usually worth fixing when the fault is a trolley, sensor or remote. When its board or motor fails, we price that repair beside a new opener, Linear or another brand, so you can choose.
Linear questions
What do the flashing lights on a Linear LDCO850 opener mean?
They are diagnostic codes, and the flash count names the fault. On the LDCO850, two flashes mean shorted wall station wires, three a blocked safety beam, four too much force, five a remote used in vacation mode, six limits set too close together, and seven an encoder error. Count the flashes before you call, because the number narrows the repair.
Why does my Linear remote close the door but not open it?
Vacation lock is probably on. On Linear LDCO850 wall stations, the lock button stops remotes from opening a closed door while still letting them close it, and the opener flashes and beeps five times when someone tries. Press the wall station's lock button again to turn it off.
Who makes Linear garage door openers now?
Nice North America makes them now and counts Linear among its brands. Linear has been based in Carlsbad, California since 1961, and manuals printed a few years ago carry the Nortek Security & Control name. Newer models are branded Nice Linear, such as the 621, 661 and 861, while LDO and LDCO units carry Linear alone.
Why does my Linear remote only work close to the garage?
A weak remote battery or a damaged antenna wire on the opener is the usual cause. Many Linear remotes run on a CR2032 coin cell, so replace that first. Linear's manual warns that cutting the short antenna wire on the back of the opener weakens range, so make sure it hangs free and straight. If range stays short with a fresh battery, the receiver may be failing.
Can a Linear opener run on battery during a power outage?
Some Linear openers can, including the Nice Linear 661, which ships with a backup battery installed. The LDCO801 offers one as an option, and LDCO850 units hold a battery box inside the housing. Two beeps with the door open mean the battery is low, and four mean it no longer holds a charge and needs replacing.
Related pages
Linear calls near you
Linear work has taken us to Beaumont-Wilshire, Damascus and Boring, Hazel Dell and the rest of the metro, and the posted price is the same at every address.
Other brands we work on
Ready to get the door moving again?
Call with the symptom, or text a photo of the door and the opener, and we will name the part and the posted price before anyone drives out.