Ask a landlord-tenant lawyer and get answers ASAP
Thank you for your question. I look forward to working with you to provide you the information you are seeking for educational purposes only.
If the premises is not habitable, you need to give the landlord written notice that the premises is not habitable due to lack of hot water and you demand they pay for you to stay elsewhere until the water is back on or you demand a reduction in rent. If the landlord refuses, you cannot just deduct it, you would need to actually sue in small claims court for the money due for the breach of the warranty of habitability.
Please do not forget to leave positive feedback by clicking on the 5 stars at the top of your page, as the experts are not employees of the site and get no credit for spending time with customers unless they leave positive feedback. Thank you.