York furnace
 

My furnace will not turn on. The diagnostic fault code does not have a code for: slow blinking red light. The light is suppose to be a steady green.

Turn off power to the furnace at the service switch and turn it back on again.
Post back here with the results.

We did and no change. Thank you so much for your reply to my problem.

Do you have single digit or double digit fault codes
Sometimes they are hard to make out.
Start by checking all your limit switches and for power to the ignitor.