Genie fault code

Genie code H003

The platform up #1 valve circuit is shorted to battery positive. Everything is locked out except platform down. [src]

Stop: machine locked out

Source: Genie Service and Repair Manual, GS-30/32/46/47, Part No. 1272217GT Rev E1 (October 2023), page 169. Applies to Genie GS slab scissor lifts with SmartLink: GS-1530/1532, GS-1930/1932, GS-2032/2632/3232, GS-2046/2646/3246, GS-4047.

Likely causes

The manual lists 3 causes:

  1. Short in the platform up #1 harness.
  2. Shorted platform up #1 coil.
  3. Ground control (GCON) ECM.

How to fix it

Work through these in order, as the manual's troubleshooting chart does:

  1. Check the device on the faulted circuit (coil, horn, alarm, etc.) for a short or open circuit; replace it if it tests bad.
  2. If the device is good, check the harness and connector between the ground controls and the device; repair or replace them if bad.
  3. If the harness is also good, check the ground control (GCON) ECM and replace it if it tests bad.

Call a technician: Right away. Genie says to tag a damaged or malfunctioning machine and take it out of service, and to repair it before use.

Did this fix it?

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Sources

  1. Genie Service and Repair Manual, GS-30/32/46/47, Part No. 1272217GT Rev E1 (October 2023) (retrieved November 3, 2026)