This was helpful, thanks. Unfortunately the number of flashes says control unit failure in the manual. So likely needs replaced I'm guessing. Anyone have a hook up on garage door openers?
Also, back to the furnace, it's been working again since I cleaned the sensor and replaced the filter, however my wife pointed out that the heat doesn't feel as 'warm' as it usually did. Like the air coming out is definitely warmer than the air temp in the house but not as warm or hot or strong as it used to, when set at the same temp. Is there anything I can look into on that?