Emergency services were alerted around 8pm last night after a "small electrical fire" broke out in the building. Smoke was seen coming from the cable which supplies power to one of the tower's two lifts.
But the crew of HMS Bangor, which is moored on the River Clyde near the centre, rushed to the scene and managed to put out the flames before the fire service arrived.
A spokesman for Scottish Fire and Rescue said there was no major damage, but the lift would have to be checked by electrical engineers before it could be safely operated again. The tower has two lifts, so the facility could open today with just one in use.
The latest drama comes four days after the 417ft structure reopened following years of problems and delays, including fixing issues with its lifts.
Around £1.8 million had been spent refurbishing the tourist attraction over the past four years after lift failures led to an incident in 2005 when 10 people were trapped for several hours. Additional maintenance problems resulted in closures, with the tower eventually shut in 2010.
The £10 million tower, first opened in 2001, is the only structure in the world capable of rotating 360 degrees into the prevailing wind.