I have a Armstrong ultra 80 111 furnace that mane burners will not ignite. Induction fan comes on pilot lights and stays lite for 90 seconds but mane burners will not ignite . Thermostat works properly. Blower motor works when put on fan. Back at the start of winter hade same problem. Removed door in front of burners and it worked fine until two days ago. Wondering if it mite be gas valve.
- posted
10 years ago