Linear / Nice garage door opener help
Model-specific 1–6 and 1–7 diagnostic generations, battery-alarm beeps, MegaCode 318 MHz compatibility and exact-model support.
Linear / Nice model hubs
LDO33
Nice/Linear identifies LDO33 as a 1/3 HP residential operator compatible with belt or chain rails, with a built-in MegaCode receiver, obstacle-sensing beams and a self-diagnostic system that can indicate six trouble conditions.
Open model hub →Linear / Nice modelLDCO800
Nice/Linear documents LDCO800 as an 800 N DC operator with variable-speed operation, built-in MegaCode receiver, self-diagnostic/self-adjusting operation, optional battery backup and belt or chain rail support.
Open model hub →Linear / Nice modelLDCO852
Nice/Linear identifies LDCO852 as a smart 800 N DC garage-door operator with Wi-Fi/app control, integrated battery backup, 2,000-lumen dual LED lighting, built-in MegaCode receiver and an included MTR3 remote.
Open model hub →Linear / Nice modelLDO50
Nice/Linear's LDO33/LDO50 datasheet identifies LDO50 as the 1/2 HP member of the belt/chain LDO family. The official manuals library groups LDO33 and LDO50 under the same manuals, including the six-condition courtesy-light troubleshooting table.
Open model hub →Linear / Nice modelLDCO850
Nice/Linear identifies LDCO850 as an 800 N smart DC operator with Wi-Fi/app control, a single LED light panel, integrated battery backup, built-in MegaCode radio and a self-diagnostic system. Its homeowner manual separates 1–7 door-operation flashes/beeps from 2/4/5 battery alarm beeps.
Open model hub →Linear / Nice troubleshooting guides
Linear MegaCode 318 MHz Remote Compatibility: MTR3, MTS3, MCT-3 and Receiver Clues
Use the MegaCode receiver format—not case shape—to decide whether a current Linear remote belongs in the compatibility path.
Linear LDCO800 Remote Compatibility: MegaCode, MTR3 and External-Receiver Checks
The LDCO800 has a built-in MegaCode receiver, but an add-on receiver can still change which remote actually controls the door.
Linear LDO33 / LDO50 Flash Codes 1–6: Courtesy-Light Diagnostic Guide
Decode the shared six-condition LDO33/LDO50 courtesy-light table without importing LDCO800 or later LDCO850/852 meanings.
Linear LDCO800 Flash Codes 1–7: Exact Lamp-Flash Troubleshooting
Read the LDCO800 seven-condition lamp table correctly, including the model family's seventh-flash encoder/limit branch.
Linear LDCO850 / LDCO852 Trouble Codes: Door Flashes vs Battery Beeps
Separate the 1–7 door-operation flash/beep table from the 2/4/5 battery-alarm beep table before diagnosing these smart DC openers.