I have a 2001 Sundance Altamar 850 that one of the main relays cuts off 3 seconds after power on (K4,K5 or K6). It had been making what I thought was bearing noise from the circ pump for a few days, now no heat or circulation. I've pulled one leg of the circ pump, both hi and low of the main, heater, O2, and light, with no effect. The panel shows intitally 107 deg (it's low 30's today) and then shows ------ Any suggestions? Thanks.