The LiftMaster 001A3982 Operator Cover for Damp Environment is a genuine factory accessory designed to help protect LiftMaster commercial door operators from moisture and humidity in challenging locations. Built for compatibility with LiftMaster J, H, GH, MJ, MH, DHJ, and DJ models, this replacement cover creates an added shield over the operator’s drive and control components to help reduce exposure to splashing water, condensation, and corrosive mist. It’s a practical upgrade for commercial and industrial applications such as car washes, wash-down bays, agricultural buildings, parking facilities, and other damp or humid environments where extended reliability is critical.
This cover installs over the operator head using standard mounting practices and does not change the unit’s electrical specifications or programming; the operator continues to run at its original voltage and frequency. For best results, have a qualified technician perform the installation, ensure all conduit entries are properly sealed, and maintain clearances for service access and ventilation. The 001A3982 is not intended for submersion or high-pressure spray and should be paired with proper site sealing practices per local codes. Choose this OEM LiftMaster damp-environment cover when you need a dependable, moisture-resistant protective shroud for J/H/GH/MJ/MH/DHJ/DJ commercial door operators.
| Operator Series | Specific Model Numbers | Mounting Style |
|---|---|---|
| MAXUM 700 | JDC7S1BMC, JDC7S4BMC, RJDC7S1, JHDC7S1, TDC7S1 | Wall/Trolley Mount |
| MAXUM 1200 | JDC12S1BMC, JDC12S4BMC, RJDC12S1, JHDC12S1, TDC12S1 | Wall/Trolley Mount |
| H Series | H, MH, H501L5, H751L5, H101L5 | Wall-Mount Hoist |
| J Series | J, MJ, J501L5, J751L5, J101L5 | Wall-Mount Jackshaft |
| GH Series | GH, GH501L5, GH751L5, GH101L5 | Gearhead Hoist |

