Honeywell T8000C Owner's Manual page 16

Troubleshooting Guide (continued).
Symptom
System on indicator
or is lit, but no warm or
cool air is coming from the registers.
System on indicator
is flashing
Wait a couple minutes after seeing the flame or snowflake
and then check the registers.
Minimum off timer is in effect. Wait five minutes until the
minimum off timer is complete. See p[age 13 for minimum
off-timing description.
16
Action
69-1437EF