fireman57
Captain
- Joined
- Aug 24, 2004
- Messages
- 3,811
I have this tempstar furnace, model number N8MPN100F-1481 manufactured in May of 2006 that the heat is not working on. The AC is fine. I replaced the circuit board in May of this year and it is still under warranty. I am getting the 3 flash code of the pressure switch being open whenit should be closed. The code is P 10. I unplugged the P1-10 plug and plugged it back in and it kicked on but only blew cool air. I unplugged it and plugged it back in again and it is back to the 3 flash code of the pressure switch. Is there an easy fix to this or do believe it is a problem in the circuit board again. Thanks.