we have an ~15 year old luxair gas furnace. I've found that around 30%
of the time it does not start in the AM.
When it works, the wall thermostat triggers, the furnace becomes very
hot, the blower starts and everything is fine.
When it doesn't work, the thermostat triggers, the furnace becomes warm
and stays warm, the blower does not start. After an hour or more, the
furnace gets very hot, the blower starts etc.
I belive this only happens with the first AM trigger. If the furnace
goes off and comes on again later in the day everything is fine.
We'll have the HVAC guys in next week, but can anyone diagnose this
problem in the meantime?