When Cool On is flashing, this means the compressor protection is engaged(see section 1.7).
System switch
Use the System switch to place the system in one of the following modes.
Use the Fan switch to select the fan operation.
Temperature setting
Press the
Built-in compressor protection
Your thermostat has a feature that helps prevent damage to the compressor of your air conditioning system. Because damage can occur if the compressor is restarted too soon after shutdown, this feature forces the compressor to wait five minutes before restarting. During the wait time, the message Cool On flashes on the screen. When the safe wait time has elapsed, the message stops flashing and the compressor turns on.
Press the Run button to follow the programmed schedule. You can have up to four periods in one day. Each period can be programmed with a different temperature setting.
Wake | Morning temperature |
Leave | Daytime temperature |
Return | Evening temperature |
Sleep | Night temperature |
To program a period, you need to set its start time and its two temperature settings (one when the thermostat is in cooling mode and another one when it is in heating mode). The same period and settings are repeated every day.
For maximum energy savings without sacrificing comfort, you can program the schedule such that the temperature is at an economical level when you sleep or are away during the day and at a comfortable level when you are awake and at home.
Period | Start time | Heat | Cool |
Wake | 6:00 a.m. | 70 °F (21 °C) | 75 °F (24 °C) |
Leave | 8:00 a.m. | 62 °F (16.5 °C) | 83 °F (28.5 °C) |
Return | 6:00 p.m. | 70 °F (21 °C) | 75 °F (24 °C) |
Sleep | 10:00 p.m. | 62 °F (16.5 °C) | 78 °F (25.5 °C) |
To temporarily ignore the programmed schedule, press
NOTE: Pressing
To change the setpoint temperature, press either button more than once. Press the Run button if you wish to cancel the temporary setting before the beginning of the next period.
Permanent override of schedule
To permanently ignore the programmed schedule, press
Press the Run button if you wish to cancel the override and resume the programmed schedule. The word Hold will disappear and the thermostat will be set to the temperature programmed for the current period.
Set the System switch to Off before removing the batteries. Otherwise, the heating/cooling system could remain activated even when batteries are removed.
Install two fresh AAA batteries when Lo Batt (low batteries) flashes on the screen. The icon appears for 60 days before the batteries are depleted. Replace batteries once a year, or when you will be away for more than a month. Most settings are stored in non-volatile (permanent) memory. Only the clock must be set if the thermostat was without batteries.
The screen is blank.
Temperature settings cannot be changed.
Cool On is flashing.
HI appears on the screen.
LO appears on the screen.
E1 appears on the screen.
E2 appears on the screen.
Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If at any time during the warranty period, the product is determined to be defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option).
If the product is defective,
Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr N, Golden Valley, MN 55422, or whether a replacement product can be sent to you.
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage that occurred while the product was in the possession of a consumer.
Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE-YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.
If you have any questions concerning this warranty, please write Honeywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V4Z9.
If you have any questions regarding your thermostat, please go to http://yourhome.honeywell.com, or call Honeywell Customer Care toll-free at 1-800-468-1502.
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