25
TROUblESHOOTINg
DISplAY IS blANK
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling
system is on .
• Make sure furnace door is closed securely.
• If thermostat is battery powered, make sure fresh AA
alkaline batteries are correctly installed.
TEmpERATURE SETTINgS DO NOT CHANgE
Make sure heating and cooling temperatures are set to
acceptable ranges:
•
Heat:
45° to 90°F (7° to 32°C).
•
Cool:
50° to 99°F (10° to 37°C).
HEATINg SYSTEm DOES NOT RESpOND
(“HEATINg” AppEARS ON SCREEN)
• Check for 24 VAC at the equipment on the secondary
side of the transformer between power and
common. If voltage is not present, check the heating
equipment to find the cause of the problem.
• Check for 24 VAC between the heat terminal (W)
and the transformer common. If 24 VAC is present,
the thermostat is functional. Check the heating
equipment to find the cause of the problem.
• Check for loose or broken wires between the
thermostat and the heating equipment.
61000652D 8400 Tstat Install.indd 25
7/9/13 9:03 AM
