Honeywell 69-1490 Owner's Manual page 4

Then set the SYSTEM switch:
Cool: Normal setting for months when your home
needs cooling (air conditioning). Digital display
shows a snowflake
Off: Both heating and cooling are off.
Heat: Normal setting for months when your home
needs heating. Digital display shows a flame
when heating is on.
Em. Ht.: (Not available on all models.) Switch to this
setting when your home needs heat, but your
equipment has failed or is not working properly.
69-1490
SYSTEM
Cool Off Heat Em.Ht.
SYSTEM
SWITCH
4
when cooling is on.
M10274