If you have 120 vac going into the board and @ where the heating element connects; the board is good. If you have an Ohm meter you can disconnect power remove the heating element connections from the board and test the element. Normally you should have about 44 ohms. If it is infinite, then the element is open. If it tests good, run a power cord to the ref. power cord off another receptacle. the receptacle could be breaking down under load; unless you tested with a load already. Good luck and keep us posted.
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Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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