Multiple equilibria and asymmetric climates are found in an atmospheric GCM coupled to an upper mixed layer ocean with thermodynamic sea ice on an aquaplanet. The model is run in a configuration close to that employed in the Budyko-Sellers type energy balance models. All externally specified fields are constant over the year, zonally symmetric and symmetric about the equator. The amplitude of a specified ocean heat transport is varied and within a certain range a number of distinctly different stationary states are found: An ice-covered planet, a cold climate, a present-day-like climate and an ice-free warm climate. Asymmetric states with large sea ice extents in one hemisphere and none in the other are also found. This work can be considered a step towards understanding why many simpler climate models exhibit multiple equilibria while more comprehensive AGCMs tend not to.