My daughter electric furnace needs a sequencer. She has a Radco furnace with (I belive)a warren 3 coil 15kw total heaters. The bad seq part no is 15sh4 309706. I have schearched the internet for the part number but unable to locate the part. I went to a heating company and they gave a supco q103 part num 15sh2 309573
h1-20 c4-110. I installed the new part but only the heater will come on but no fan.
The old seq has this set of numbers on the top
15sh4 h24v 309706
1-2 h1-20 c 40-90
3-4 h30-90 c1-30
19737
Can any one tell me what I'm doing wrong or do I have the is wrong part number?

Make sure you have the blower motor wire hooked in on M2 with the power feeding it on M1. M3 and M4 5 kw, M5 and M6 10kw, M7 and M8 15 kw.