Product review (5 stars): gas valve coil kit simple fix
This has worked great.  Our dryer would ignite but wouldn't maintain heat.  I was able to find this problem on ehow and then ordered this part which was very cheap.  The instalation was super easy, just 2 bolts to loosen and drop the new parts in to place, then hook the wires back up. We are back into business and drying cloths.  We are very happy and saved a large bill from the Repairman who charges $200 to just come out.  Our dryer is older and we had thought of even buying a new one.  This little part for now has put all that on hold.