ISLAMABAD   - The air conditioning system at leading hospital of federal capital, Pakistan Institute of Medical Sciences (PIMS) has gone out of order for the last four days causing severe problems to patient and attendants. Hospital sources said that air conditioning system of PIMS has not been working resultantly the patients of complex surgeries could not be provided required temperature.Doctors said that required temperature was extremely necessary for some operated patients otherwise injures can further deteriorate.On the other hand, PIMS administration was of the opinion to that AC machinery at the hospital has become obsolete but due to lack of funds it could not be revamped.