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Pub. No. 12-5027-01
69-1615
Troubleshooting Guide (continued)
(continued)
Symptom Possible Cause Action
Heating does not come
on.
No power to the thermostat.
System selection is not set to Heat.
Heating setpoint is below room
temperature.
Check that setpoint is above room temperature.
Check if the circuit breaker is tripped—reset the circuit breaker.
Check if the fuse is blown—replace the fuse.
Check if the system switch at the equipment is in the Off
position—set to On position.
If 24 Vac is present, proceed with troubleshooting.
Wait five minutes for the system to respond (thermostat displays
Wait).
Set system selection to Heat.
Cooling does not come
on.
No power to the thermostat.
System selection is not set to Cool.
Cooling setpoint is above room
temperature.
Check that setpoint is below room temperature.
Check if the circuit breaker is tripped—reset the circuit breaker.
Check if the fuse is blown—replace the fuse.
Check if the system switch at the equipment is in the Off
position—set to On position.
If 24 Vac is present, proceed with troubleshooting.
Wait five minutes for the system to respond (thermostat displays
Wait).
Set system selection to Cool.