Is the blower coming on? If not, i would start with the blower. You would need to check for voltage going into the blower. If you do, and blower is not coming on, then the blower is bad. IF the blower is on, then check the tubing coming to/from the blower for breaks or disconnected. Also, may be a bad blower vacuum switch. You can jump this after a call for heat has been established to see if it fires. You should only attempt this if the blower is working.
Answers & Comments
Is the blower coming on? If not, i would start with the blower. You would need to check for voltage going into the blower. If you do, and blower is not coming on, then the blower is bad. IF the blower is on, then check the tubing coming to/from the blower for breaks or disconnected. Also, may be a bad blower vacuum switch. You can jump this after a call for heat has been established to see if it fires. You should only attempt this if the blower is working.