how its going.. i finally figure out my problem and its the duovalve stuck close. first i tried like you said disconnecting the wire still no heat. so i took off the hoses and connected the wire and waited a few minutes and i tried blowing in it and got nothing. its stuck closed i even went to a junk yard they had one with the same problem as mine stuck close. i think i have to buy one new are do you know a way i can unstick the valve thanks for the help.