B767 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 38; Flight Crew Total 3068; Flight Crew Type 38
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Weather
Reported to work at XA25 local. Had a return to the gate due to mechanical problem. Maintenance could not fix the problem before our Crew Critical Off time. We were reassigned to go to hotel and get 9 hours of rest and return the next day. I got to Hotel at XG30 and noticed my room was Hot. I called the Front Desk and was informed that only heating was available to all rooms and was told to open a window. I could not get the proper rest I needed as my room was hot and also my body was set to fly all night. I called the Crew Desk at XA15 local and reported Fatigued as I only had 1 solid hour of sleep at this point and was not going to be fit for duty.
[Report narrative contained no additional information.]
B767 First Officer reported calling in fatigued after cancellation the previous day; being unable to rest due to no air conditioning at the hotel and changed circadian rhythm.