We investigate undoped amorphous hydrogenated silicon with spin‐dependent photoconductivity (SDPC). In addition to recombination via single carriers in tail states and dangling bonds, a broad resonance is observed, attributed to recombination of excitonic states. A study of the influence of light‐induced degradation on the different recombination processes in a‐Si:H is presented. The experiments are well described by existing theories, which assume exciton‐like states to be the electronic precursor for metastable defects.