Today I came to Miriam and Joesph’s Charleswood home because the furnace and ac system stopped working. Upon inspection of the wireless thermostat I found it wasn’t not connected to the equipment interface module. Upon inspection of the equipment interface module I found it had no power. The furnace has power but a blown fuse. I replaced the fuse and tested the system and it blew again. I disconnected the ac from the control board and checked the ac system outside. Upon further diagnostics I found the ac contactor had failed and was causing a short that blew the fuse on the furnace control board. The systems have not been maintained and are out of warranty. I have signed up Jo and Miriam for a member ship and reinstated the warranty as long as the annual checks and tune ups are done.