On Dec 1, 1:35 pm, DerbyDad03 wrote:

Does the blower come on? If the filter is so dirty that it is
restricting air flow, you could have an over heating problem and the
furnace may be protecting itself by shutting down.

Sorry about the tardy reply! Cleaning the filter immediately cleared
up the problem.

They _really_ need to have an indication like this. It would have
saved me buying the new thermostat...

Maury