Guide :Sport & Outdoor - Others : Yankees Bedding MLB Comforter
York high effenciency furnace not firing all the time
I have a York high efficiency furnace that is not firing all the the time. The unit is about 4 to 5 years old & has been doing this for a few months now and getting progressively worse. (model # GM9S08B12DH11G) The trouble code light inside is blinking a rapid red, indicating a Twinning Error, Incorrect 24V Phasing.