Sorry but I find this confusing. You say the a couple of bedrooms are cold in your rented home. That suggests that the furnace works. So why isn't any heat getting to these rooms? Or is heat getting to these rooms but they are drafty or badly insulated.
Anyway, this is covered by the Health and Safety codes, 17920.3 (6). Notify the local health dept. They'll probably send someone over to check out your problem.

