I have a Carrier 58MCA that is not working. I replaced the flame sensor last December and it was fine all winter. Now it's cold again and I have no heat. The board again flashes 34 after it lights the burners for about 10 seconds. I checked the flame sensor and getting a dead .000 reading on DCmv between the hot end of the sensor and the ground end where the installation screw goes. Here are my questions:
1.) Why am I going through flame sensors?
2.)How can I bypass the sensor to get a little heat in the house over the weekend? I will stay with the furnace while it's running to avoid catastrophe 8)
3.) Is a $25 aftermarket replacement equivalent to the $65 Carrier replacement?
4.) Anyone need cold beer? You could store it here for a few hours til I get this worked out.
Thank you very much for your help.