I have a Miller Furnace in a Mobile Home that continually kicks on and off each time only running for less than a minute before eventually running longer to provide heat! I believe that both the burner and blower are kicking on and off, and I'm pretty sure that the thermostat is ok? The repair man replaced the blower motor with a larger one thinking that would solve the problem but it has not! Is there maybe a problem with these furnaces, apparently I'm not the only one having this problem! Any solutions would be greatly appreciated! If you have one, please email me at email@example.com
Sounds like he made a guess about the blower motor and he guessed wrong. I would hire someone else if I were you. This problem is common and there are a variety of reasons for it. Hire someone who has some real diagnostic skills. Your repairman hay have actually created another problem by putting in a larger blower motor.