Michael G Chesterfield , NH January 12, 2015 Appliance: Amana Gas Dryer ALG643RBW Amana Dryer Alg643rbw / Palg643rbw: Dryer not heating up. How to replace Dryer Gas Valve Coil Kit. I think the gas valves, the two contact coil (No Ohms reading) so I changed them both and for good measure I change the flame sensor as well. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes