LiftMaster K41-0575-000 TECHNA Control Board Service Kit Details
The LiftMaster K41-0575-000 is a matched electronic board service kit for select LiftMaster TECHNA DC barrier gate operators. It includes the main control board and motor drive board used to manage operator programming, access-control inputs, safety-device monitoring, motor movement, battery charging, diagnostics, and communication between the major operator components.
LiftMaster service guidance specifies using K41-0575-000 when replacing either the TECHNA main control board or motor drive board. Both boards should be replaced together so their firmware versions remain compatible.
Compatible With
- LiftMaster PBG24DCW TECHNA Parking Barrier Gate Operator
- LiftMaster PBG24DCG TECHNA Parking Barrier Gate Operator
- LiftMaster CBG24DCW TECHNA Commercial Barrier Gate Operator
- LiftMaster CBG24DCG TECHNA Commercial Barrier Gate Operator
- LiftMaster IBG24DCW TECHNA Industrial Barrier Gate Operator
- LiftMaster IBG24DCG TECHNA Industrial Barrier Gate Operator
- Select PBG24DC, CBG24DC, and IBG24DC configurations when K41-0575-000 appears in the current LiftMaster repair parts documentation
Included Board Assemblies
- LiftMaster K41-0431-000 TECHNA main control board
- LiftMaster K41-0434-000 TECHNA motor drive board
The kit is supplied as a matched service set. Do not replace only one board from the kit or combine a new board with an older board unless current LiftMaster service documentation specifically approves the firmware combination.
What the Main Control Board Does
- Manages the operator's opening and closing logic
- Provides menu-based programming and diagnostic display functions
- Processes monitored entrapment-protection inputs
- Processes open, close, stop, exit, shadow, and fire department inputs
- Controls the primary programmable relay and accessory power outputs
- Communicates with the motor drive board and optional expansion equipment
- Stores operator configuration, limits, diagnostic events, and adjustable settings
- Supports the TECHNA connectivity and access-control functions provided by the complete operator system
What the Motor Drive Board Does
- Controls the TECHNA 24V DC brushless motor
- Manages motor direction, speed, current, and drive operation
- Communicates motor status and fault information to the main control board
- Works with the limit system encoder for controlled arm positioning
- Supports soft-start and soft-stop operation
- Provides battery charging through the compatible TECHNA power system
Important Firmware and Compatibility Warning
The main control board and motor drive board must use compatible firmware. TECHNA diagnostic code 32, VER MISMATCH, indicates that the boards have incompatible major firmware versions or that the motor drive board is not communicating correctly.
K41-0575-000 includes both boards so they can be replaced as a matched set. Do not substitute a separately sourced K41-0431-000 or K41-0434-000 board without confirming its firmware compatibility and current LiftMaster service requirements.
Features and Specifications
| Specification | Details |
| Brand | LiftMaster |
| Service Kit Part Number | K41-0575-000 |
| Product Type | Matched main control and motor drive board service kit |
| Main Control Board | K41-0431-000 |
| Motor Drive Board | K41-0434-000 |
| Operator Platform | LiftMaster TECHNA barrier gate operators |
| Compatible Model Families | Select PBG24DC, CBG24DC, and IBG24DC operators |
| Motor System | TECHNA 24V DC brushless motor drive platform |
| Firmware Requirement | Main and motor drive board firmware versions must be compatible |
| Replacement Procedure | Replace both boards at the same time |
| Programming Required | Operator configuration, limits, settings, and connected equipment must be checked after installation |
| Motor Included | No |
| Limit Encoder Included | No |
| Expansion Board Included | No |
| Wire Harnesses Included | Confirm package contents before ordering |
| Installation | Professional commercial gate service recommended |
Parts Not Included With This Board Kit
Similar Boards That Are Not Automatically Interchangeable
| Part or Operator Family | Important Difference |
| K41-0431-000 Main Control Board | Individual main board number; current service guidance calls for the matched K41-0575-000 board set |
| K41-0434-000 Motor Drive Board | Individual drive board number; firmware must match the main control board |
| K1D8387-1CC Expansion Board | Optional input, relay, and loop-detector board rather than the main or motor drive board |
| K41-0072-000 Relay Adapter Board | Separate auxiliary relay assembly |
| Legacy BG, Mega Arm, and Mega Sprint Boards | Different operator platforms, wiring, firmware, inputs, motor controls, and mounting arrangements |
Problems That May Resemble a Failed Board
- The barrier arm does not open or close
- The display is blank or repeatedly restarts
- The motor does not run or reports a motor drive fault
- The operator reports a firmware version mismatch
- The operator loses its limits or configuration
- The batteries do not charge correctly
- The operator reports an encoder or product ID fault
- Accessories, safety devices, or communication equipment stop responding
These symptoms do not automatically confirm that both boards have failed. Similar problems may be caused by low battery voltage, failed batteries, transformer or rectifier faults, damaged harnesses, poor grounding, a defective motor, encoder failure, incorrect product ID harness, water intrusion, accessory shorts, or mechanical binding.
Diagnostic Codes Commonly Associated With Board Service
- Code 8 - NO CONFIG: Operator configuration is missing or corrupted
- Code 14 - NO LIMITS: Open and close limits are not stored
- Code 31 - CTRL BOARD: Main control board internal error
- Code 32 - VER MISMATCH: Main and motor drive board firmware versions are incompatible
- Code 36 - ID MISMATCH: Current product ID does not match the stored product ID
- Code 47 - MOTOR DRIVE: Motor drive board fault
- Code 49 - MOTOR COMM: Communication fault between the main and motor drive boards
- Code 95 - DRIVE TEMP: Motor drive board temperature is too high
- Code 96 - DRIVE CURR: Motor drive board current is too high
Review the complete event log and follow current LiftMaster diagnostic procedures before replacing the boards. A code may identify a wiring, power, motor, encoder, or mechanical problem rather than a defective circuit board.
Before Ordering Checklist
- Read the complete operator model from the cabinet label.
- Confirm that the operator belongs to the LiftMaster TECHNA family.
- Verify whether the model is PBG24DC, CBG24DC, or IBG24DC.
- Check the W or G model suffix.
- Confirm K41-0575-000 in the current LiftMaster parts diagram.
- Record all diagnostic codes and event-log entries.
- Check incoming power, battery voltage, charging operation, and grounding.
- Inspect the board-to-board harness and all connectors.
- Check the motor, encoder, product ID harness, and gear reducer.
- Inspect for corrosion, water intrusion, insects, overheating, or impact damage.
- Confirm that both K41-0431-000 and K41-0434-000 boards are included.
- Do not order by board appearance alone.
Programming and Setup After Replacement
A replacement main control board may not contain the previous operator configuration. The technician should be prepared to verify or reprogram the product configuration, arm length, handing, limits, reversal force, speed, timer-to-close, power-fail behavior, LEDs, buzzer, paired-operator communication, network settings, remote controls, and accessory functions as applicable.
If the operator reports NO LIMITS or ID MISMATCH after board replacement, follow the current LiftMaster limit and product configuration procedures. Do not operate the barrier arm until its configuration and travel limits have been properly established.
Installation and Safety Notes
Turn both the AC power switch and battery switch to the OFF position before opening or servicing the operator. Confirm that all power has been removed before disconnecting boards or wiring.
Label and photograph every connector before removing the original boards. Inspect each plug for bent pins, corrosion, overheated terminals, damaged insulation, or incorrect field wiring before connecting the replacement boards.
After installation, verify limits, arm balance, speed, force, battery charging, motor operation, event codes, access-control inputs, communication functions, and all required monitored entrapment-protection devices.
Do not bypass photo eyes, safety edges, vehicle detection, fire access, emergency access, warning devices, stop circuits, or other operator safety functions during testing.
Technician Note
A failed board may be the result of another problem. Water intrusion, reversed battery wiring, a shorted accessory, damaged motor wiring, failed encoder, incorrect grounding, excessive motor current, or a binding mechanical assembly can damage the replacement boards if the original cause is not corrected.
Professional Advisory
Internal TECHNA electrical service involves AC input power, battery current, sensitive electronic assemblies, moving mechanical components, and stored spring energy. Diagnosis and replacement should be completed by a qualified commercial gate technician familiar with LiftMaster TECHNA programming and safety requirements.
Local pickup in Hialeah Gardens, Florida may be available after current inventory and package contents are confirmed.
Product Questions and Answers
Which LiftMaster operators use the K41-0575-000 board service kit?
The kit is used with select TECHNA PBG24DCW, PBG24DCG, CBG24DCW, CBG24DCG, IBG24DCW, and IBG24DCG barrier gate operators. Confirm the current parts diagram before ordering.
Which circuit boards are included with K41-0575-000?
The service kit includes the K41-0431-000 main control board and K41-0434-000 motor drive board.
Do both TECHNA boards need to be replaced together?
Yes. LiftMaster service guidance specifies replacing both boards at the same time so the main control and motor drive board firmware versions remain compatible.
Does K41-0575-000 include the motor, encoder, or wire harnesses?
No. The motor, limit system encoder, gear reducer, wire harness kit, expansion board, relay adapter board, batteries, and other operator components are separate unless specifically stated in the package listing.
Does a VER MISMATCH diagnostic code mean I need this kit?
Code 32 indicates incompatible board firmware or a motor drive communication problem. Check board power, connections, harnesses, and reported firmware versions before replacing the matched board set.
Will the gate operator require programming after board replacement?
Yes. The operator configuration, product ID, arm settings, limits, force, speed, timer, accessories, remote controls, and communication settings should be checked and programmed as required.
What should be tested before ordering new TECHNA boards?
Check the event log, incoming power, batteries, charging circuit, grounding, board harnesses, motor, encoder, product ID harness, accessories, and mechanical operation before condemning the boards.
Who should install the K41-0575-000 service kit?
A qualified commercial gate technician should install and program the kit because service involves AC power, battery current, motor controls, firmware compatibility, limits, and monitored safety devices.
