atwood 7920-II FURNACE ONT IGNITE, fan comes on,no clicking then shuts off,
i changed sail switch,temperature control switch and circuit board ,still wont ignite ,help whats net to try
Forum Discussion
Sounds like it’s likely the igniter or the flame sensor. Another remote possibility is the high-limit thermostat.
You have probably already spent more than it would have cost to have a Tech diagnose the problem. It’s time to stop throwing parts at it and use a multimeter and find the problem - then apply the fix. The sequence of operation should be in the Owner’s Manual. Use it along with a multimeter to find what is happening and where the hang up is.
