All detectors show nominal performance with very low and very stable leakage currents.
Apparently, the Chandra thermal control has changed several times in the course of the mission resulting in a net temperature increase of 7 degrees between July 1999 and February 2000. This is still in the allowed temperature range. This is not a temperature effect, but a high particle flux effect. This is due to the front detector being exposed to high intensity, low energy particles, whereas the detectors further down in the stack are better shielded. Leakage currents for detector A exceed yellow high and red high limits, for B only yellow high limits inside the radiation belts.