The chiller is a arctica 1/10 hp and I have a 34 gallon red sea max and it's about a year old and I bought it used off of the owner o my lfs but I can't get in contact with him cuz he's on vacation till Sunday
Can you check to see if it's pushing our cold water. If not, then it might need a recharge. If it is, then is underpowered. A 1/10 hp should be plenty to cool your tank. I would guess its simply not working.