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What timers are available on the HONEYWELL T8602 thermostat to help remember maintenance tasks?
Your HONEYWELL T8602 thermostat has up to three timers to help you remember when to change or clean the furnace air filter, whole-house humidifier pad, or ultraviolet air treatment system UV lamp. The available timers and their measurement methods depend on the type of thermostat system you have.
| Timer Measurement | Type of Thermostat | |
|---|---|---|
| Manual System Switches (Heat, Off, Cool) | Pushbutton System Keys (Heat, Off, Cool) | |
| Calendar days in any mode. | Furnace air filter and UV lamp timers | UV lamp timer |
| Calendar days in Heat mode only. | Humidifier pad timer | Humidifier pad timer |
| System run time in any mode. | — | Furnace air filter timer |
How do I view or reset the timer settings on my HONEYWELL T8602 thermostat?
When the thermostat activates a timer, the thermostat flashes “Filter” until the timer resets. To view or reset the timer:
1. Reset the timer by pressing the i key until the expired timer is displayed.
2. Press the Time ▲ key to reset the timer.
3. Press the Run Program key.
NOTE: You can view the number of days remaining at any time by pressing the i key three or four times. If more than one timer is active, all active timers show sequentially when pressing the i key several times.
What are the installer setup options for the timers on the HONEYWELL T8602?
For instructions on entering Installer Setup mode, see the product installation instructions (installers only). The following table provides the Installer Setup instructions for the timers.
| Selection | Installer Setup Number | Factory Setting | Other Choices | ||
|---|---|---|---|---|---|
| Display | Description | Display | Description | ||
| Furnace air filter timer (pushbutton System keys) | 43 | 2 | 30 days (System run time) | 0, 1, 3, 4 | 0 – off 1 – 10 days 3 – 60 days 4 – 120 days (Time is counted when heat, cool or fan is running) |
| Furnace air filter timer (manual System switches) | 43 | 2 | 90 days (calendar days) | 0, 1, 3, 4 | 0 – off 1 – 30 days 3 – 180 days 4 – 365 days (Time is counted by calendar days in any mode.) |
| Humidifier pad monitor | 44 | 0 | Off | 1, 2, 3 | 1 – 90 days 2 – 180 days 3 – 365 days (Time is counted by calendar days in heat mode.) |
| Ultraviolet air treatment (UV) system lamp monitor | 45 | 0 | Off | 1 | 1 – 365 days (Time is counted by calendar days in any mode.) |
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