How to potty train my 10 yr old...?

dog. She's only a 20 lb yorkie/schnauzer and she is as stubborn as a mule. Took 2 years to train her when she was a pup. We just moved into a rental home and she began peeing in the bathroom, only at night and she has started peeing in the office room, during the day, which unfortunately is carpeted. I need advice as to what to do. We began shutting her in the bathroom at night and when we leave but i don't like doing this because she hates it. The new home is 5 degrees warmer than the previous house and she drinks water way more than before. Turning the heat down is not possible as we live in a condo.