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69-1284—2
STEP 7. CUSTOMIZE YOUR THERMOSTAT
Your Honeywell CT3550 thermostat comes preset to the most commonly used settings. The settings are:
— Gas or oil forced air furnace.
— Smart Response technology on.
— Temperature °F.
— 12-hour clock format.
You can change any or all of these settings.
IMPORTANT
Always press the keys with your fingertip or a similar blunt tool. Sharp instruments like pens and pencil
points can damage the keyboard.
❑
Press and hold down
,
, and
, simultaneously until the screen shows.
You now can change any of these settings.
Fan Operation (Feature Number 2)
Fan operation options are:
— 0 = Gas or oil furnace. Furnace controls fan operation during heating (preset).
— 1 = Electric furnace or single stage heat pump. Thermostat controls fan operation during heating.
To change fan operation:
❑
Press
once.
❑
Press Time
to move to next feature or
to return to main display.
System Type (Feature Number 4)
System type options are:
— 1 = Gravity or steam system.
— 3 = Hot water, high efficiency furnace (90% or better), or single stage heat pump.
— 6 = Gas or oil forced air furnace (preset).
— 9 = Electric furnace.
M13347
FEATURE
NUMBER
OPTION
Run
Program
M13348
