Wellington's popular cable car is out of action today because of an operating system fault.
Problems were discovered during regular overnight testing on Wednesday, Wellington City Council said.
Further testing is being carried out, with help from the overseas manufacturer.
The @WellyCableCar will remain closed today 21/06/2019. Free bus replacement services will be running from 7am to 7pm every 20 minutes.— Wellington City Council (@WgtnCC) June 20, 2019
Wellington Cable Car chief executive Simon Fleisher said the problem related to acceleration and braking.
However, the brakes had not failed, he said.
"We have found just some minor discrepancies both in terms of acceleration and the acceleration speeds and also braking distances.
"So we just want to make sure that... we align with our certified standards under the Railways Act," he said.
The cable car should get the green light to go again this weekend.