This is a brand new heat kit HKR-15C and goodman air handler MBR1200AA. I do not have a heat pump or A/C. After installation, everything came on, except on the heat strip only 1 coil is heating. Had an electrician test every wire and he said everything is getting power appropriately. Is it just a faulty heat strip or or is something hooked up wrong? The installation instructions were followed exactly.