NORDYNE G4 624631-B Relaced but give continuous light. We had 5 lights but after reversing the jumpers it fixed that. Demand was set on thermostat when replaced board but didn'tknow therm was shut off and the house was locked up. Like a dummy I hit the wrong jumper. He finally came home, put on demand, took right off. So the board took care of the problem and I apreciate all the info on this subject. All that knowhow was there to tap into. Thanks for this! I wished you all a Merry Christmas, now it's a Happy New Year we have heat after one of the coldest winters in Va. In years. Elwin