Honeywell ENERGYPRO T8665D - Manual (Page 47)

47 69-1538
System on
indicator—
for heat;
for cool—
is lit, but no warm
or cool air is
coming from the
registers.
Heating/cooling equipment
turns on the fan when the
equipment has reached the
preset time or temperature.
Wait a minute after seeing the
or and then check the registers.
Heat Pump Fault
Monitor LED is
lighted.
The heat pump signaled the
thermostat to indicate a
problem.
Move the System switch to Em. Ht setting
(heat pump only). See Heat pump
Operating Instructions or call your local
heat pump dealer or Energy Utility for
assistance.
Table 3. Troubleshooting. (Continued)
Symptom Possible Cause Action