Inspected furnace, found failed transformer. Advised customer of findings and replaced transformer. Started furnace to check for possible faults: in heat mode, it takes a few moments before inducer kicks in, pressure switch and open limit codes flash during that time. Outdoor unit contactor pulls in when call for a/c. No 240v to outside disconnect box. Customer just had electrical panel replaced and will contact his electrician. Static refrigerant pressure 146, outside ambient air temp 51*F, controls & wiring ok, coil has coating of dust (customer will take care of). Furnace online at this time.