Late last week a Russian astronaut trainee, working at Johnson Space Center, smelled smoke in his spacesuit and felt heat on his neck during a test in a pressure chamber.
NASA feels the problem will be cleared up and is examining CO2 scrub cans, which have not functioned properly in the past, said NASA spokesman Lynette Madison at Johnson Space Center.
"There is no evidence of a combustion source," said Madison. "They feel like this is going to be cleared up and there won't be any issue for the spacewalks." Late today, Mission Control radioed to tell the crew they expect to clear the spacesuits soon.
From Flame Trench here.
A fire in a spacesuit would be fatal to the astronaut. The Oxygen would ignite and instantly kill the occupant of the spacesuit.