I don't know - had no time to look before leaving for work this afternoon. SO, obviously check that first when I get home. If cooler fan is not working - we have our culprit, try to get it to work first. If not, hopefully the 2500K is not damaged so when I put the new cooler on it works properly. Should have trouble shot this first- but figured he had already done that. Whats that old saying about "assuming things"...LOL