How to check the igniter (continuity?)

If there is power to the ignitor and it does not glow the ignitor is bad. If it does glow,place a clamp on amp meter over one wire of the ignitor and turn the circuit on. If the ignitor reads less than 3 amps,replace the ignitor.
If the ignitor glows and registers 3 amps or more you must check the flame sensor for correct operation. If the ignitor and flame sensor are both good,replace the gas valve coils.