Honeywell THR872CUK User Manual

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The Holiday feature maintains a constant energy-saving temperature 
while you are away for an extended time (up to 99 days).

1  Press the HOLIDAY button.

2  Press + or - to select the number of days you will be away (up to 

99 days), then press OK to save.

3  Press the p or q buttons to set the temperature during your 

absence, then press OK to save and exit.

To cancel the Holiday mode at any time, press the HOLIDAY button 
again.

10.

0

°

10.

0

°

10.

0

°

MON  27/12/10

SUN 09/01/11

SUN 09/01/11

RETURN DATE OK?

RETURN DATE OK?

TEMP OK?

DAYS

DAYS

DAYS

Set number of days, then press 

1

14

14

Set temperature, then press 

•  Optimum Start: This is an energy-efficient feature that adjusts the start time of your heating system. For 

example, on cold days your heating system will start earlier to ensure that your home is warm when you 
wake in the morning. On warmer days, heating will begin later to save energy costs. (See page 29 to turn 
on this feature.)

•  Summer/winter time change: The thermostat automatically changes the clock time to correspond with 

changes to and from daylight savings time. (See page 28 to turn off this feature.)

•  Temperature offset: In some cases, the thermostat must be installed in a location that does not 

accurately control temperature for optimum comfort in other rooms. You can set the thermostat to 
compensate for this by adjusting the offset (see page 29).

•  Proportional band width: If your heating system is oversized for your home, you can compensate by 

increasing the width of the control proportional band up to 3°C (see page 29).

•  Cycle rate and minimum boiler on/off time: Adjusting these features can help your climate control 

system work more efficiently for increased comfort and economy. See page 31 to find recommended 
settings for your system.