York forced air heater with electronic ignition troubleshooting
I have a York forced air gas fired heating system with I guess a direct ignition instead of a standing pilot light. When the system comes on, the blower comes on and then a couple of seconds later the gas valve clicks and some gas goes through but no ignition. Then the gas valve clicks again but still no ignition and the blower continues to run blowing cold air. I checked all electrical connections and everything is tight . I don't see anything trying to ignite. The gas line goes through the gas valve then through 4 tubes with a thermocouple maybe on the left side and I guess a hot service ignitor on the right side. Can anybody help me with this? Thanks Mark