Thepropane tank emptied before delivery truck came. After it was refilled, the draft inducer motor ran but the igniter won't come on. York 90 plus furnace control box (WHITE ROGERS 50a50-209) light blinks 3 times. I checked tubes and pressure switch on diaphram. There was a little water in drain tubes. Could igniters be bad? If so how do I check them?
( I had run out of gas 2 years ago and the draft inducer motor had to be replaced, but it is still working now.)

Draft inducer has nothing to do with propane. What is 3 blink code, it is on the control board on older White Roger boards.