I have a Goodman high efficiency gas furnace which is about 8 years old. It seems to be working fine.
I had it cleaned by a technician today. He observed that the flame stays on for a couple of seconds after the power is shut off and that this is dangerous and needs to be rectified. He recommends a replacing the control panel at around $450 for parts and labour. Is he correct?
Frankly I don't see the harm of a two second delay for the flame to shut off.