The thermoluminescence (TL) sensitivities of 58 chondrules separated from the Dhajala (H3.8) chondrite have been measured in order to investigate the cause of the 105-fold variation in the TL sensitivity of ordinary chondrites. The TL sensitivities of the individual chondrites range over nearly two orders of magnitude, from 0.002 to 0.12 (where 4 mg of bulk Dhajala powder=1), with no correlation with chondrule mass, cross-sectional area or diameter. Some chondrules have TL per unit mass ten times that of bulk Dhajala powder and mass-TL balance arguments suggest that these chondrules are a major TL carrier. The composition of 15 chondrules was also determined and it was found that high TL chondrules tend to have Ca contents at the upper end of the range observed. These observations are consistent with the TL sensitivity variation in ordinary chondrites, which is related to metamorphism, being caused by the devitrification of glass to produce feldspar and with feldspar being the dominant TL phosphor in Dhajala. That chondrules are an important TL carrier would also be consistent with primary feldspar as the TL phosphor, but petrologic observations probably make this appear unlikely.