Hello, I have a Onan Cummins Home Stand-by Generator Model 20GSBB-6714. I believe the Engine Oil Heater needs replacement. The power circuit for the current heater is 120VAC and currently draws 0.7 ampere current. I have the circuit on a Ground Fault Interrupter Circuit (GFCI) Breaker rated 20 ampere. The GFCI has been tripping OFF in a short time upon energizing circuit. I can not find any information on a replacement part number from Cummins, nor can I find any pictures of the heater. I think that this may be a screw-in block heater, but not sure. Can anyone advise if the tripping OFF is due to the GFCI Breaker or does the circuit need a standard breaker? Does anyone have any information to provide me. I am in need of the part # and where to purchase OEM part. Thanks.