I have a goodman furnace about 8 years old model number is gmp100-3. the problem i'am having is it wants to keep running and starts up while blower is going in the winter during running tries to ignite while still running.could you give me some idea what this problem could be.thank you:confused:

I really do not know what you are saying exactly but a dirty flame sensor and shorted thermostat wires can sometimes cause your situation.