 Story highlights NASA says the space station and crew were never in any danger 
 
 A cooling pump shut down after hitting a temperature limit 
 
 An emergency spacewalk could be necessary, but it's too soon to tell 
 
 NASA scaled back operations on the International Space Station on Wednesday after discovering a problem with a cooling system. Shutdown mode 
 
 One of the station's two external cooling loops, known as Loop-A, shut down when it reached a pre-set temperature limit on Wednesday, Byerly told NBC News. Teams worked to get the cooling loop back up and running, NASA said. Mission managers are trying to determine whether a software fix can get the valve working again, or whether a spacewalk will be required. The station and crew aboard were never in any danger, NASA said. NASA said Thursday that there has been no decision on the spacewalk, and it may be a couple of days before the decision is made, according to Kenny Todd, the ISS mission management team chairman. The situation doesn't represent a life-threatening emergency, but it has required a cutback in normal operations on the orbiting outpost, NASA spokesman Josh Byerly said. As a result, the station's six-person crew had to prioritize life support systems, electrical systems and science experiments — including the freezers that preserve scientific samples.
– NASA is reporting a glitch with one of the two cooling pumps on the International Space Station, but it says none of the six crew members are in danger, reports CNN. The crew shut down some non-essential electrical systems as a precaution while they figure what went wrong and how to fix it. Best case, it's a software glitch and a relatively easy repair. Otherwise, a spacewalk will be necessary, reports NBC News. It will likely take days or perhaps weeks to sort it all out. "They're fine for the near future," says a NASA spokesman.