Getting 170 code. The sensor (3 prong) plugs into the small board, then that plugs into the main board. looking at the display, no lights are on and the display just says 170. When I unplug the sensor and small board, the lights come on the display.
I just replaced the sensor last year. Lesson learned not to be a tight wad and buy a "like new" off eBay. Wanted to run in by the pros before I bought another one. -- new this time-