21
Pub. No. 22-5183-01
69-1228—1
Troubleshooting
(Contiuned)
Symptom
Possible Cause
Action
Heating will not
come on.
No power to the
thermostat.
System selection is
not set to Heat.
Heating setpoint is
below room
temperature.
Check that the setpoint is above room
temperature–reset temperature or wait for
room temperature to fall.
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 Heat position.
Wait five minutes for the system to respond.
Cooling will not
come on.
No power to the
thermostat.
System selection is
not set to Cool.
Cooling setpoint is
above room
temperature.
Check that the setpoint is below room
temperature–reset temperature or wait for
room temperature to rise.
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 Cool position.
Wait five minutes for the system to respond.
