My mobile home furnace quit. My son is moving into it, not staying overnight yet. On Dec 12, he opened up to move some stuff; furnace not working. Thermostat (lever-type, non-digital) would tell furnace to start up. Furnace made clickety-click noises (technical term!) but would not light. Had the status indicator flashing three times. Called a local HVAC company, man showed me that the igniter was not glowing. He replaced the igniter, furnace worked fine after two hesitations. Next morning, same problem; no light-off. Another man came out yesterday, Dec 13, said Ignition Module locked out. He turned off power at thermostat and waited to reset system. It worked okay. Said I should get info on the diagnostic flash codes. Got them off Net today, after latest shutdown, now being described next. This morning, Dec 14, same problem. Sometime during the night the furnace kicks off, does not come back on. Why it kicks off, I don't know. It was 26 degrees at 0730 this morning in the high desert. I want all-night operation, even if we are not there. I had the thermostat at 68, worried about the water pipes.