Hello Experts,
I have a crazy problem that has me baffled and hope somebody can assist me. I have replaced the porcelain flame sensor, still is cycling before it starts if it starts? Sometimes I have to shut the power off and back on for it to cycle a few times before starting. The air filter is ok and I have checked duct work for any obstructions and all is ok. Here is the peculiar thing-I noticed when it tries to start three baffles out of four will light first then the fourth baffle where the flame sensor is will not light as fast as the first three baffles (burners). Sometimes it will cycle three four five times before it lights and each time the same process, other times it will not light and I have to shut it down and turn it back on in order to restart the process and it usually lights second or third try then. Do any of you experts have any ideas to assist me with the problem? I would appreciate any feedback. Thank You Robb In Michigan.

 

The burners have crosslighters which carry the flame from one burner to the next. In the case of burners which look like small jet airplanes, the 'wings' are the crosslighters. Remove each of the burners & clean the slots in the 'wings' with a thin piece of metal. (I've found a feeler gauge blade to work well.) Then blow them out well with compressed air. You could also have a gas pressure issue. If the cleaning doesn't help, get someone to check the gas pressure.