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23 69-1631—1
CUSTOMER ASSISTANCE
Visit us on the Web at www.honeywell.com/yourhome or call Honeywell Customer Care at 1-800-468-1502.
Before you call, please have the following information available:
— Thermostat model number and serial code (located under the battery cover).
— Type of heating/cooling system (hot water, warm air, oil, gas, etc.).
— Number of wires connected to the thermostat.
NOTICE: This equipment is a Class B digital apparatus, that complies with Canadian Radio Interference Regulations, CRC c.1374.
Heating does not come on • Check that the System switch is set to Heat.
• Check the system fuse or circuit breaker and replace or reset if necessary.
• Check for correct wiring and good connections.
• If display is blank or displays “bAt Lo,” install fresh batteries.
• Allow time for the furnace to heat up and the fan to come on before
checking for heat at the register.
• If temperature setting is higher than current room temperature and
SYSTEM ON arrow is displayed, thermostat is operating correctly. Contact
heating contractor for assistance.
Cooling does not come on • Check that the System switch is set to Cool.
• Check the system fuse or circuit breaker and replace or reset if necessary.
• Check for correct wiring and good connections.
• If display is blank or says “bAt Lo,” install fresh batteries.
• The thermostat has a built-in time delay on cooling. Allow 5-10 minutes
after changing setting before air conditioner starts.
• If temperature setting is lower than room temperature and SYSTEM ON
arrow is displayed, thermostat is operating correctly. Contact ac contractor.
The house is too warm or too cool • Press RUN PROGRAM to check the current temperature setting.
• If desired, change the temperature setting.
Furnace cycles too often or system
cycle length is too short or too long
• Adjust the screws on the back of the thermostat.
The thermostat current setting does
not match the display temperature to
within plus or minus 1°
• Plug the wiring hole in the wall behind the mounting plate with insulation to
prevent drafts that might adversely affect thermostat operation.
• Be aware that it is normal for the current setting and the displayed room
temperature to differ on occasion.
• During recovery from setback or setup, setting and displayed room
temperatures can differ for up to 30 minutes after recovery period.
If... Then...