I have a Trane furnace and the third out of three burners doesn't want to come on. The surface ignitor will light, the gas to the first two burners kicks on, but the third burner that that shoots flames into the flame sensor doesn't come on and then the furnace will shut off in a couple seconds and then will try to repeat this for a few times. Sometimes it will eventually light, but sometimes it won't.
Do I just need to take the burners apart and give it a good cleaning? I'm a self admitted cheapskate and like to do the work myself to save money but when it comes to anything that has to do with gas, sometimes I'll fork over the money to hire a technician. Is this something that's easy enough to do myself or just go ahead and get a hvac guy out? I've done many home repairs successfully with the help of youtube but this particular one I'm having a hard time finding a detailed video that goes through steps.