I have a carrier model 58sta110-22 furnace in my house. It runs for a few hours and then stops. The blinking light shows either a #13 or #33 error code both of which are limit circuit faults. I have replaced the flame sensor as directed by an HVAC guy and it did not help. The furnace and house are only 3 years old
He told me if that did not work then replace the circuit board. before i go out and buy a circuit board i was wondering if anyone can verify that is what the problem is.
I am tired of paying HVAC guys $80 a pop to give me an opnion which then happens to be wrong.(I have nothing against HVAC guys, just dont like throwing away money, Incidently I plan on taking an HVAC class this summer)
Can anyone help me?