Pepco Web-Programmable Thermostat Homeowner's Manual page 21

Troubleshooting
No Cool
Possible Cause
System switch not set to COOL.
Outdoor unit disconnect or breaker tripped.
Cooling system requires service or thermostat requires
replacement.
Multi-stage Air Conditioner or Heat Pump:
Second, Third, or Fourth Stage Won't Come On
Possible Cause
Your thermostat is designed to determine the optimum
time to activate the second stage. Simply raising the
temperature in heating or lowering it in cooling will not
always force the thermostat to bring the second stage
on quickly. There is a time delay of 0 to 30 minutes
depending on the performance of the first stage of
the system.
Pepco Web-Programmable Thermostat Homeowner's Manual
Corrective Action
Press SYSTEM button to select COOL and press
to lower the temperature setpoint below room
temperature.
Verify the outdoor unit disconnect or breaker has not
been tripped.
To diagnose this condition:
Press SYSTEM button to select COOL and press
to lower the temperature setpoint below room
temperature. Within a few seconds the thermostat
should make a soft click sound. This sound usually
indicates the thermostat is operating properly.
If the thermostat does not click after being reset,
contact your installing contractor for a replacement
thermostat. If the thermostat clicks, contact the furnace
manufacturer or HVAC contractor for a service visit to
verify the cooling is operating correctly.
Corrective Action
Wait for the second, third, or fourth stage to come on.
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