Loft House: On arrival I found the air handler located in the barn area mezzanine. Went through the system and found the that the emergency water safety switch was tripped due to a clogged drain line. While looking through the system, I found that the blower wheel is completely caked over blocking all the fins and spacing. Will be recommending to have the drain cleared and the blower wheel cleaned. Spoke with homeowner, and he has approved the drain line cleaning at this time, but wants to hold off on the blower wheel for the time being. Completed the drain line cleaning, flushed and treated primary drain and removed standing water from the overflow emergency water safety switch. Reset system and verified operation. Everything is working at this time.