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Heating does not come on. Check that the System switch is set to Heat.
Make sure the heating setpoint is above the room temperature.
Check the system fuse or circuit breaker and replace or reset, if
necessary.
Make sure the System switch is in the On position; set it to On if it is in
the Off position.
If temperature setting is higher than the current temperature and the
display says HEAT, contact Honeywell Consumer Services at 1-800-
468-1502.
Cooling does not come on. Check that the System switch is set to Cool.
Make sure the cooling setpoint is below the room temperature.
Check the system fuse or circuit breaker and replace or reset, if
necessary.
Make sure the System switch at the air conditioner is in the On
position; set it to On if it is in the Off position.
If... Then...