I've tried several of the hotels in Ya'an, but I have settled on the Ya'an Sage.
The staff is friendly and always available, the wifi works well enough to skype home or download a small movie, the sheets are clean, and most importantly... The A/C blows cold.
The only downfall is that thier vacuum seems to be eternally broken.
Centrally located and only a 5 minute walk to catch the buses to Bifengxia gorge or the panda base.