I believe it is my "cartridge heater" otherwise know as an ignitor. If it is bad and I throw an ohm meter across it, should it be open? Any idea what a normal reading should be? If I did my math right.. P=V^2/R.. so for a 400 watt ignitor I should read around 36 ohms.. anyone find a cartridge heater from Grainger that works for the Mini A? $150 is steep.